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Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Loads & Dynamics Engineer to own and execute structural loads, vibration, and dynamic analyses for complex mechanical systems associated for Kaleidos, the world's first portable microreactor and supporting hardware. You will play a critical role in ensuring structural integrity and survivability across all phases of the product lifecycle, including manufacturing, transportation, handling, deployment, and operational environments. This role requires a hands-on engineer who is comfortable working in ambiguous, fast-paced environments and collaborating closely with structures, mechanical design, thermal, nuclear, and test teams. Responsibilities & Duties: Develop and own static, dynamic, and transient loads for reactor systems, support structures, and transport configurations. Perform structural dynamics analyses, including modal, random vibration, shock, sine vibration, and fatigue assessments. Implement explicit dynamics simulations to model nonlinear reactor response under transient seismic and transportation event cases. Define and analyze transportation and handling environments, including shock and vibration from road, rail, air, or sea transport. Generate load cases and environments to support structural sizing, design margins, and verification plans. Conduct finite element analyses (FEA) using tools such as ANSYS, Abaqus, or similar tools. Collaborate with design engineers to influence hardware architecture, material selection, and joint design. Support test planning and correlation, including shaker tests, modal surveys, and structural verification testing. Develop and maintain analysis documentation, reports, and requirements for internal reviews and regulatory interfaces. Contribute to failure investigations, root cause analyses, and design improvements Help establish best practices for loads, dynamics, and structural verification within a growing engineering organization. Required Qualifications & Skills: Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, Structural Engineering, or a related field. 2+ years of experience in loads, dynamics, or structural analysis for complex mechanical systems. Strong fundamentals in structural mechanics, dynamics, and vibration. Experience with finite element modeling and analysis of metallic and composite structures. Proficiency with industry-standard FEA tools (e.g., ANSYS, Abaqus, Nastran). Familiarity with design allowables, safety factors, and margin-of-safety methodologies. Ability to work cross-functionally and communicate analysis results clearly to both technical and non-technical stakeholders. Desired Qualifications & Skills: Experience in aerospace, launch, defense, nuclear, or heavy industrial hardware environments. Dynamics modeling software experience (LD-Dyna, Abaqus explicit, or other). Background in shock and vibration testing and test-article correlation. Knowledge of fatigue, fracture mechanics, and bolted joint analysis. Experience defining or interpreting environmental specifications and requirements. Master’s degree or PhD in a relevant engineering discipline. Familiarity with nuclear, spaceflight, or safety-critical system requirements. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $106,500 - $146,475

Job DescriptionSpace Systems Integration (SSI) is a fast-growing engineering company that provides aerospace solutions to a variety of government and commercial customers. Our employees are forward-thinking, self-directed individuals who are committed to solving our customers’ technical challenges. SSI is seeking a Senior RF Systems Engineer for a role in El Segundo, CA. Senior RF Systems Engineer will have in-depth knowledge of digital signal processing, signals, remote sensing, mission analyses, and system engineering. You will provide subject matter expertise to support customer decisions with respect to contractors’ development of spaceborne RF signal processing payloads, ground processing systems, and overall mission capabilities. Role and Responsibilities include: • Responsible for acting as primary technical oversight for the development, build, verification and deployment of Space RF payloads, providing Government leadership, as needed, recommend course corrections to the payload design and build through delivery., • Requirements generation., • Evaluation and compliance assessments to generated requirements and requirements flow down., • Concept design evaluation and analysis of alternatives., • Assessments of Critical Technology Elements (CTE), Technology Readiness Assessments (TRAs) and Manufacturing Readiness Assessments (MRAs)., • Concept of Operations (CONOPS) development., • Provide technical oversight of payload integration process onto candidate spacecraft., • Provide technical oversight of transition to operations to include the development, operator training, payload initialization and checkout, and on-orbit operations., • Responsible for assessing proposed payload design updates and understanding all performance and spacecraft impacts due to these updates., • Responsible for performing assessments of risk reduction plans associated with improving the maturity of payload design and hardware., • Responsible for working with contacts at prime and subcontractors to ensure work is on schedule and progressing.Required Qualifications:, • Bachelor's degree in electrical engineering or a technical field such as Physics, Math, or Aerospace Engineering with 14 years or more of experience in relevant field or Master's degree in electrical engineering or a technical field such as Physics, Math, or Aerospace Engineering with 12 years or more of experience., • Experience with spaceborne RF payloads, signal processing, signals, mission data processing., • Ability to analyze, discover and find solutions for technical issues in relevant technology., • Working knowledge of orbital mechanics and environmental effects on spaceborne RF payloads., • Experience applying Systems Engineering principals to the execution of payload development, build and I&T onto spacecraft., • Good communication skills to peers and customer leadership., • Active TS clearance with in-scope T5/SSBI is required, along with SCI eligibility and participation in Continuous Evaluation., • Must meet all requirements for SCI and SAP access and be willing to undergo a polygraph examination., • Travel is 10%.Desired Qualifications:, • 16 years or more of experience with RF payloads., • Experience with integration & test of spaceborne RF payloads onto spacecraft., • Familiarity with DoW acquisition processes., • Experience as a project manager on space payload program or IPT., • Ability to generate link budgets for end-to-end space to ground Comm systems and/or RF Payloads. Target salary range: $190,000 - $220,000. The estimate displayed represents the typical salary range and bonus potential for this position based on experience and other factors. We offer medical/dental/vision benefits and 401k contribution. Space Systems Integration provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, or any other characteristic protected by federal, state, or local laws. #ssi #weknowhowtobuildit #spacejobs

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role We are seeking a Senior Test Engineer to design and implement mission-critical procedures for reactor operators managing our groundbreaking nuclear microreactor technology. This role offers a rare opportunity to bridge engineering, operations, and human factors in a highly technical and fast-paced environment. You will collaborate with a multidisciplinary team to translate complex hardware and software designs into clear, executable, and DOE or NRC compliant procedures. Your work will ensure that Reactor Operators (ROs) and Senior Reactor Operators (SROs) can efficiently and safely execute test, commissioning, and operational activities. This position goes beyond traditional systems engineering - you will also gain hands-on experience as a Reactor Operator (RO), directly influencing the development of operational software, procedures, and future reactor designs. Responsibilities & Duties: Qualify as an operator to gain firsthand experience, ensuring procedures align with real-world execution. Collaborate closely with engineers to improve operator interfaces, procedural workflows, and software tools. Support testing and iterative improvements of digital twin scenarios, operator systems, and human-machine interfaces. Ensure compliance with DOE and NRC standards, maintaining strict formatting, clarity, and usability in procedural documentation. Develop and refine operational procedures that integrate both software and hardware-in-the-loop testing. Required Qualifications & Skills: 6-7+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing. Proficiency in managing or optimizing complex hardware and software processes for testing and operations. Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations. Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime). Desired Qualifications & Skills: Prior experience working as an operator in nuclear environments (e.g., nuclear energy, naval reactors, or radiation-controlled facilities), with familiarity in safety protocols, regulatory compliance, and high-reliability operations 2+ years of full-time nuclear operations experience. Licensed as Senior Reactor Operator or Naval equivalent. Hands-on experience in developing technical procedures, human factors engineering, or operational interface design. Prior operations background such as mission control room operator. Proficiency in Python, UNIX, for procedure testing within the simulator environments. Experience with human factors and user-centered instructions for operational workflows. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Willingness to travel 50% - 60% of the time as needed for projects. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133.5K - $184.8K

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a talented Principal Power Systems Engineer to lead the design, modeling, and validation of electrical power systems supporting our nuclear microreactor platform. You will play a critical role in defining how power is generated, conditioned, controlled, and delivered to customers across grid-connected, islanded, and rapidly deployable environments. In this role, you will own power system studies from early architecture tradeoffs through detailed modeling, testing, and system validation. You’ll collaborate closely with electrical design, controls, turbomachinery, nuclear, thermal, and software teams to ensure safe, stable, and reliable power delivery under a wide range of operating and contingency conditions. This role is central to commercializing Earth’s first mass-produced portable nuclear reactors. Responsibilities & Duties: Own power system architectural design for microreactor-based power generation systems operating in grid-connected and islanded modes. Develop single-line diagrams of the power system for single- or multiple-reactor configurations. Develop FMEAs to identify system behavior during component/system failures and identify redundancy paths. Evaluate system behavior during disturbances such as load steps, faults, breaker operations, and loss-of-generation events. Size energy storage systems for reactor cold start and variable load demands. Own synchronization of multiple reactors in a microgrid and multiple reactors tied to grid. Collaborate cross-functionally with the power conversion team to understand generator requirements and design power systems that can integrate seamlessly. Participate in software-in-the-loop (SIL), hardware-in-the-loop (HIL), and system-level testing to validate/verify system performance. Support system checkouts, commissioning, and testing of all power requirements Regulatory compliance of power systems, including testing methods to verify power quality. Required Qualifications & Skills: B.S. in Electrical Engineering with an emphasis in power systems or control systems. 5+ years of experience designing power systems for generation, microgrids, or mission-critical power systems. Experience with sizing and integrating high-voltage battery systems with power electronics. Strong experience with power system modeling and simulation tools (e.g., PSCAD, ETAP, PSS®E, Simulink, or equivalent). Solid understanding of inverters, grid converters, DC/DC converters, rotating generation, and power system control modes (grid-forming, grid-following, droop control). Experience in analyzing system stability, protection behavior, and fault response in complex electrical systems. Ability to clearly communicate technical concepts and results to cross-functional teams. Desired Qualifications & Skills: M.S. in Electrical Engineering or related discipline. Experience in power electronics development for high-power, medium-voltage equipment, including transformers, switchgear, inverters, active rectifiers, DC/DC converters, and generator controls. Experience with islanded power systems supporting critical loads. Familiarity with interconnection requirements, grid codes, and relevant IEEE or utility standards. Experience in modeling dynamic loads and fast-changing electrical demand. Exposure to nuclear, aerospace, defense, or other highly regulated industries. Experience mentoring junior engineers or leading technical efforts on complex programs. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at Radiant’s El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $200,500 - $314,475

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role The Senior Power Electronics Engineer will play a pivotal role in the design and development of the power electronics of our nuclear-driven high-speed generator. Responsibilities include but are not limited to the design of high-voltage and high-speed generator drives, DC-DC converters for high-voltage batteries, and standalone and grid-tied inverters. You'll join the Power Conversion and Electrical Systems team responsible for converting mechanical energy generated from a nuclear reactor to electrical energy to deliver to customers. You will own power electronics design, analysis, simulation, and component selection. You will partner cross-functionally with top industry engineers at Radiant, as well as vendors and partner organizations, including government agencies. Your efforts will be instrumental in bringing the first nuclear microreactor to market. Responsibilities & Duties: Design power electronic systems to convert AC and DC power sources into stable grid compatible voltages and frequencies. Take ownership and configure our systems active rectifiers, inverters, dc/dc converters. Apply EMI/EMC strategies to the system design, selection of line filters, capacitors, grounding and isolation. Utilize expertise in design and validation of gate drivers, power stages, magnetics, and controls. Conduct modeling and detailed simulation of inverters. Own the design and build a fully functioning inverter autonomously. Perform circuit formal analysis, e.g., de-rating and worst-case circuit analysis. Optimize loss, efficiency, and conduct thermal analysis of the inverter. Required Qualifications & Skills: Bachelor's degree in Electrical Engineering, specializing in power electronics. 6+ years of design experience designing high voltage and high-power electronics. Expert with high voltage power semiconductor selection (Si/SiC/GaN, IGBT, Diodes, MOSFETs), gate driver, and protection circuit design. Strong experience in high voltage (HV) power electronics design (+800V) including AC/DC inverters, and DC/DC converters. Strong understanding of different PWM switching techniques, DPWM, ZCS, ZVS. Proficiency with at least one of the common power electronics tools such as PLECS, PSCAD, dSPICE, PSIM, or Simplorer. Expertise in EMI/EMC filter design for stability, noise rejection, and surviving threat signals. Solid understanding of capacitor and super-capacitor design and selection, such as electrolytic, film, ceramic, and tantalum. Desired Qualifications & Skills: 8+ years of design experience designing high voltage and high-power electronics. Experience in magnetics design including transformers and inductors for high-frequency power conversion applications. Familiarity with functional safety standards (IEC 61508 or equivalent) and fault-tolerant design practices; background in aerospace, defense, or nuclear applications a plus. Startup experience or ability to work in a fast-paced development environment. Demonstrated experience in embedded programming with C/C++. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $158,000 - $219,450

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Systems Engineer to develop, maintain, and govern engineering design standards, requirements, and verification methodologies for the mass production of nuclear reactors. This role bridges systems engineering, design, analysis, manufacturing, and operations. As a Systems Engineer, you will be responsible for ensuring that hardware and concepts of operation meet requirements and are designed in accordance with Radiant standards. In short, you’ll be the glue between our analysis, test, certification, and design teams, helping to connect the technical dots and solve problems across our reactor designs. Responsibilities & Duties: Develop, own, and continuously improve design criteria, standards, and requirements for reactor core, structures, fluid systems, electronics, and shielding. Provide critical peer review and approval of hardware designs during design reviews; confirm acceptance and qualification test campaigns. Engage with Engineering to drive optimized designs while shepherding them through the design review process, verification testing, and part release. Guide engineers through the Radiant design process and ensure design criteria/requirements are being followed for reactor design, manufacturing, and test activities. Collaborate with responsible engineers throughout the entire design process, ensuring design criteria are properly considered in the development of hardware. Required Qualifications & Skills: Bachelor’s degree in engineering (mechanical, aerospace, systems, or related). 2+ years of experience in engineering design, analysis, or systems engineering. Experience in manufacturing or production environments. Excellent communication and documentation skills. Desired Qualifications & Skills: Advanced degree in an engineering discipline. Experience with requirements management tools (e.g., DOORS, Jama, Flow). Strong understanding of the system design process including interface control and tradeoffs. Familiarity with structural, thermal, and fluid systems. 5+ years professional experience in an engineering role (design, analysis, test, or manufacturing. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133,500 - $190,050

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Principal Turbomachinery Engineer to serve as the Responsible Engineer for the turbomachinery within our nuclear-driven power generation system. This role owns the mechanical design, integrity, and performance of the core rotating assembly at the heart of our 1MW closed-loop Brayton cycle. You will define and drive the mechanical architecture of high-speed rotating hardware operating at extreme temperatures, pressures, and rotational speeds. As a deeply technical individual contributor, you will set direction for rotor dynamics, structures, bearings, seals, and system integration while working closely with electrical, thermal, and manufacturing teams. This is a hands-on, high-ownership role focused on technical excellence, sound engineering judgment, and delivering reliable, production-ready turbomachinery. Responsibilities & Duties: Technical Ownership & System Architecture Serve as Responsible Engineer for the turbomachinery mechanical system. Own the mechanical architecture and design strategy for high-speed rotating assemblies (up to ~30 krpm). Lead rotor dynamics, structural integrity, and life analysis for rotating components and assemblies. Define and flow down requirements from system-level constraints including thermal, structural, and operational environments. Make key technical decisions on rotor layout, shafting, bearings, seals, materials, and clearances. Ensure designs meet performance, reliability, safety, and regulatory requirements. Establish and uphold standards for mechanical design rigor, analysis quality, and documentation. Mechanical Design & Analysis Lead detailed design of turbomachinery components including rotors, shafts, housings, and support structures. Test and validate rotordynamic systems, driving model correlation, risk reduction, and performance verification. Perform and review structural and thermal analysis to ensure integrity under high-speed and high-temperature operation. Define tolerances, fits, stack-ups, and alignment strategies for precision rotating assemblies. Partner with electrical engineering on alternator rotor integration, including electromagnetic and structural coupling. Cross-Functional Integration Partner closely with turbomachinery aero, motor design, thermal, manufacturing, and test teams. Ensure seamless integration between turbine, compressor, and alternator subsystems. Drive clear interface definitions across mechanical, electrical, and thermal boundaries. Collaborate with manufacturing to ensure designs are producible, inspectable, and scalable. Engage with suppliers on technically critical components and design decisions. Prototyping, Testing & Validation Support assembly, integration, and test of turbomachinery hardware. Define validation strategies including spin testing, thermal testing, and system-level operation. Lead root cause analysis and drive design iteration for test failures or performance gaps. Remain hands-on in hardware bring-up, troubleshooting, and refinement. Technical Influence Act as a subject matter expert in turbomachinery mechanical design and rotating systems. Provide technical guidance and design reviews across the team without direct people management responsibility. Influence engineering direction through deep expertise, data-driven decisions, and strong judgment. Contribute to technical roadmap, risk identification, and mitigation strategies. Required Qualifications & Skills: B.S. in Mechanical Engineering or related field. 8+ years of experience designing high-speed rotating machinery (turbines, compressors, or similar systems). Deep expertise in structural analysis and mechanical design of turbomachinery. Experience with bearings, seals, and high-speed shafting design. Expert-level proficiency with analysis tools (e.g., ANSYS) and advanced use of NX and Teamcenter for complex design, simulation, and product lifecycle management. Strong understanding of tolerancing, GD&T, and precision mechanical assembly. Experience owning hardware through design, build, and test cycles. Hands-on experience with assembly, integration, and troubleshooting of turbomachinery. Strong system-level thinking and mechanical intuition. Excellent engineering judgment and decision-making capability. Ability to influence without authority across cross-functional teams. Clear communicator capable of articulating complex technical concepts. High ownership mindset and accountability for hardware outcomes. Ability to operate effectively in a fast-paced, first-of-a-kind development environment. Desired Qualifications & Skills: 10+ years of turbomachinery or rotating equipment experience. M.S. or Ph.D. in Mechanical Engineering. Experience with closed-loop Brayton cycle systems or similar energy systems. Familiarity with high-temperature materials and extreme environment design. Experience integrating mechanical systems with high-speed electric machines. Prior experience as a Responsible Engineer for complex hardware. Experience scaling hardware from prototype to production. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $200,500 - $314,475

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Certification Engineer to develop, maintain, and govern engineering design standards, requirements, and verification methodologies for the mass production of nuclear reactors. This role bridges systems engineering, design, analysis, manufacturing, and operations. As a Certification Engineer, you will be responsible for ensuring that hardware and concepts of operation meet requirements and are designed in accordance with Radiant standards. In short, you’ll be the glue between our analysis, test, certification, and design teams, helping to connect the technical dots and solve problems across our reactor designs. Responsibilities: Develop, own, and continuously improve design criteria, standards, and requirements for reactor core, structures, fluid systems, electronics, and shielding. Provide critical peer review and approval of hardware designs during design reviews; confirm acceptance and qualification test campaigns. Engage with Engineering to drive optimized designs while shepherding them through the design review process, verification testing, and part release. Guide engineers through the Radiant design process and ensure design criteria/requirements are being followed for reactor design, manufacturing, and test activities. Collaborate with responsible engineers throughout the entire design process, ensuring design criteria are properly considered in the development of hardware. Required Skills and Qualifications: Undergraduate degree in engineering. 2+ years of full-time experience with engineering problem solving in design, analysis, or test of systems. Experience with complex hardware and processes related to manufacturing, integration, testing or operations. Applied understanding of requirement derivation, negotiation and verification or experience with the product design process especially as it relates to defining systems, interfaces and specifications. Desired Skills and Qualifications: Advanced degree in an engineering discipline. Experience with requirements management tools (e.g., DOORS, Jama, Flow). Strong understanding of the system design process including interface control and tradeoffs. Familiarity with structural, thermal, and fluid systems. 5+ years professional experience in an engineering role (design, analysis, test, or manufacturing. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133,500 - $190,050

Job Description Senior Video Test Engineer Broadata Communications, Inc. (BCI) - Torrance, CA On-site Company Overview Broadata Communications, Inc. (BCI) is a privately held California-based corporation. BCI is a leading and innovative company specializing in the development of market-driven products for the transmission of digital multimedia (video, audio, and data) over fiber. Our clients are world leaders in their industries, spanning entertainment, broadcast, medical, professional audio/video, house of worship, education, government, military, and transportation sectors. We are ISO 13485 and ISO 9001 certified, with a strong commitment to quality, innovation, and continuous improvement. Summary We are seeking a hands-on, detail-oriented, Senior Video Test Engineer to lead product-level and system-level validation and verification activities for BCI's high-performance digital multimedia products. This role focuses on developing senior-level test strategies, executing formal V&V testing, troubleshooting complex hardware, firmware, and software issues, improving test processes, and supporting product release, sustaining engineering, customer issue investigation, and regulatory compliance activities. The ideal candidate has strong experience with high-speed video interfaces, medical or professional AV products, embedded systems, test automation, root cause analysis, and formal engineering documentation. This position requires the ability to work independently, mentor junior engineers, drive test execution with minimal supervision, and communicate technical findings clearly to engineering, management, customers, and external partners. This is a hands-on role based in Torrance, CA, and is not a remote or hybrid position. We offer a fast-paced, high impact and stimulating environment with opportunities for professional growth within BCI. Veterans welcome! Key Responsibilities • Lead verification, validation, troubleshooting, and testing activities for the release and maintenance of BCI and third-party hardware, firmware, and software used in high-performance digital multimedia products., • Develop product-level and system-level V&V strategies, test plans, test protocols, test reports, and acceptance criteria for new products, sustaining products, engineering changes, EOL component replacement, and customer-driven product updates., • Design, develop, and execute formal validation and verification testing, including interoperability, video performance, audio performance, environmental, accelerated life cycle, regression, reliability, and safety-related testing pursuant to applicable compliance requirements, including IEC 60601-related validation., • Lead high-speed video interface testing and troubleshooting for HDMI, DisplayPort, DVI, SDI, SDVoE, composite video, streaming video, color space, timing, synchronization, EDID, HDCP, and 4K60 video systems., • Develop and improve automated test systems, scripts, fixtures, test jigs, demo systems, and lab setups to increase test coverage, repeatability, and efficiency., • Perform advanced failure analysis by reviewing failure reports, reproducing complex failure modes, designing experiments, collecting objective data, and systematically localizing root cause across hardware, firmware, software, signal integrity, power, thermal, and interoperability domains., • Support customer RMA investigations, field issue analysis, failure reproduction, corrective action verification, and engineering documentation required for internal and external communication., • Review firmware and system behavior during testing, including watchdog behavior, event logging, task scheduler operation, status polling, video lock status, thermal status, link recovery, reboot/recovery behavior, and long-duration stability., • Generate and review accurate and thorough technical documentation, including firmware/software requirements, design specifications, test protocols, test reports, test methods, process documents, user manuals, datasheets, and engineering change documentation., • Provide technical guidance and mentorship to junior test engineers and technicians on test setup, debugging methodology, documentation quality, and formal V&V execution., • Work cross-functionally with hardware, firmware, software, mechanical, quality, manufacturing, and external ODM/vendor teams to resolve issues and support product release schedules., • Contribute to project schedules, task breakdowns, resource planning, risk identification, and test execution priorities., • Maintain and improve lab organization, including common and dedicated lab benches, test equipment, mechanical tools, 3D printers, electronics tools, cables, fixtures, ESD controls, and engineering samples., • Support continuous improvement of BCI's engineering processes, V&V templates, troubleshooting procedures, test automation, lab standards, and quality system documentation.Job responsibilities within our organization are dynamic. This may not be a complete list of duties. Other responsibilities and duties may be assigned by your supervisor or upper management. Education & Experience • B.S. in Electrical Engineering, Computer Engineering, or a related technical field. M.S. degree preferred., • 7+ years of experience in testing, validating, troubleshooting, or designing multimedia hardware, embedded systems, video products, or high-speed digital systems., • Strong hands-on experience with formal verification and validation of hardware, firmware, and software products, preferably in medical device, professional AV, broadcast, defense, or other regulated/high-reliability industries., • Experience creating and executing formal V&V documentation, including test plans, test protocols, test reports, traceability, acceptance criteria, and objective evidence., • Strong understanding of high-speed video interfaces and protocols, including HDMI, DisplayPort, DVI, SDI, SDVoE, streaming, composite video, color spaces, video timings, synchronization, EDID, HDCP, and 4K60 systems., • Hands-on experience using multimedia test equipment such as Quantum Data, Audio Precision, PHABRIX, HDMI/DP analyzers, SDI analyzers, pattern generators, and video/audio measurement equipment., • Hands-on experience using standard lab equipment such as oscilloscopes, logic analyzers, signal analyzers, signal generators, spectrum analyzers, power supplies, electronic loads, thermal chambers, and data acquisition tools., • Experience with medical or regulatory test support is strongly preferred, including IEC 60601, IEC 60601-1-2, IEC 61000-4-x immunity testing, ESD, EMC/EMI, environmental testing, and safety-related validation., • Strong experience with Python scripting for test automation, data collection, log parsing, result analysis, and automated regression testing., • Experience with bug tracking, bug scrubbing, issue prioritization, corrective action verification, and engineering change validation., • Experience with printed circuit board assembly testing, cable harness production, ESD control, soldering, rework, fixture design, and mechanical/electronic assembly., • Experience with multidisciplinary bring-up and debugging, including hardware, firmware, FPGA/SoC, processor, memory, power, thermal, signal integrity, and network-related issues., • Working knowledge of PC setup, Windows/Linux environments, Ethernet/IP network configuration, firmware update tools, serial communication, logs, and embedded system debug interfaces., • Hands-on, demonstrable experience and working knowledge of most or all of the following:, • High-speed video interfaces and protocols from composite video to 4K60, including HDMI, DP, DVI, SDI, SDVoE, streaming, color spaces, timing, synchronization, and interoperability testing., • Multimedia test equipment such as Quantum Data, Audio Precision, PHABRIX, HDMI/DP analyzers, SDI analyzers, pattern generators, and video/audio measurement tools., • Standard lab equipment such as oscilloscopes, logic analyzers, signal analyzers, signal generators, spectrum analyzers, thermal chambers, power supplies, and data acquisition tools., • Python-based automation for complex test scripts, log parsing, regression testing, data collection, and test result reporting., • Bug tracking, bug scrubbing, defect prioritization, corrective action verification, and release readiness review., • Building test units, cable harnesses, fixtures, automated jigs, and demo systems using mechanical and electronic assembly., • Multidisciplinary bring-up and debugging techniques across hardware, firmware, software, FPGA/SoC, networking, power, thermal, and signal integrity domains., • PC Windows/Linux setup, Ethernet/IP network configuration, serial communication, firmware update tools, and embedded debug interfaces.Skills & Abilities, • Strong Electrical Engineering background with the ability to read, understand, review, and troubleshoot multimedia PCB schematics, block diagrams, cabling diagrams, and system architectures., • Ability to understand and debug systems involving FPGA/SoC/processors, embedded firmware, memory systems, power subsystems, high-speed serial interfaces, and video/audio processing chains., • Senior-level troubleshooting capability with the ability to isolate complex system failures using structured methods such as 5-Why, fishbone/Ishikawa analysis, fault tree analysis, controlled experiments, and objective data review., • Ability to independently define test strategy, identify test gaps, create risk-based test coverage, and drive V&V execution from planning through final release., • Strong technical communication skills with the ability to write customer-ready documentation, technical reports, root cause summaries, test reports, and management-level status updates., • Ability to mentor junior engineers and technicians while also remaining hands-on with lab setup, soldering, assembly, firmware loading, test execution, and failure reproduction., • Ability to work with minimal supervision, prioritize multiple projects, manage aggressive deadlines, and escalate risks clearly and early., • Strong ownership mindset, attention to detail, and commitment to product quality, reliability, process discipline, and continuous improvement., • Ability to work effectively with cross-functional engineering teams, quality teams, production teams, customers, vendors, and external development partners., • Highly self-motivated and willing to learn new technologies, tools, standards, and product domains as BCI's product portfolio continues to evolve.Physical Job Requirements The employee in the position will be required to occasionally move throughout the facilities, including climbing stairs, when necessary. Occasional bending and reaching in an office environment, including opening and closing file cabinets drawers with light grasping. Type on a standard keyboard (laptop or desktop). Use standard computer display screens. Use standard push-button phones and must speak clearly and be understood by others. Sit or stand in a standard upright position for a minimum of one hour, but up to 12 hours a day. Be able to lift and carry weight unassisted not exceeding 50 lbs. Compensation and Benefits • Salary Range: $120,000 - $160,000 (based on experience and qualifications), • Medical, vision and dental insurance, • 401(k) with company match (100% of the first 4% in eligible compensation), • Flexible Spending Account, • 2 weeks paid vacation, • 1 Week sick pay, • 10 company holidays, • Group life insurance Powered by JazzHR lF89VXnnaN

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role We are seeking a Senior Reactor Systems Engineer to design and implement mission-critical procedures for reactor operators managing our groundbreaking nuclear microreactor technology. This role offers a rare opportunity to bridge engineering, operations, and human factors in a highly technical and fast-paced environment. You will collaborate with a multidisciplinary team to translate complex hardware and software designs into clear, executable, and DOE or NRC compliant procedures. Your work will ensure that Reactor Operators (ROs) and Senior Reactor Operators (SROs) can efficiently and safely execute test, commissioning, and operational activities. This position goes beyond traditional systems engineering - you will also gain hands-on experience as a Reactor Operator (RO), directly influencing the development of operational software, procedures, and future reactor designs. Responsibilities & Duties: Qualify as an operator to gain firsthand experience, ensuring procedures align with real-world execution. Collaborate closely with engineers to improve operator interfaces, procedural workflows, and software tools. Support testing and iterative improvements of digital twin scenarios, operator systems, and human-machine interfaces. Ensure compliance with DOE and NRC standards, maintaining strict formatting, clarity, and usability in procedural documentation. Develop and refine operational procedures that integrate both software and hardware-in-the-loop testing. Required Qualifications & Skills: 6-7+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing. Proficiency in managing or optimizing complex hardware and software processes for testing and operations. Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations. Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime). Desired Qualifications & Skills: Prior experience working as an operator in nuclear environments (e.g., nuclear energy, naval reactors, or radiation-controlled facilities), with familiarity in safety protocols, regulatory compliance, and high-reliability operations 2+ years of full-time nuclear operations experience. Licensed as Senior Reactor Operator or Naval equivalent. Hands-on experience in developing technical procedures, human factors engineering, or operational interface design. Prior operations background such as mission control room operator. Proficiency in Python, UNIX, for procedure testing within the simulator environments. Experience with human factors and user-centered instructions for operational workflows. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Willingness to travel 50% - 60% of the time as needed for projects. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133.5K - $184.8K

Job Description Associate Test Engineer Broadata Communications, Inc. (BCI) – Torrance, CA On-site Company Overview Broadata Communications, Inc. (BCI) is a privately held California-based corporation. BCI is a leading and innovative company specializing in the development of market-driven products for the transmission of digital multimedia (video, audio, and data) over fiber. Our clients are world leaders in their industries, spanning entertainment, broadcast, medical, professional audio/video, house of worship, education, government, military, and transportation sectors. We are ISO 13485 and ISO 9001 certified, with a strong commitment to quality, innovation, and continuous improvement. Summary We are seeking a detail-oriented Associate Test Engineer. This role focuses on performing integration testing, validation and verification of new and existing products, while developing and maintaining the company’s processes, specifications, and procedures for product development, troubleshooting, and testing. This is a hands-on role based in Torrance, CA, and is not a remote or hybrid position. We offer a fast-paced, high impact and stimulating environment with opportunities for professional growth within BCI. Veterans welcome! Key Responsibilities • Assist with the development verification, validation, troubleshooting, and testing for the release and maintenance of BCI and third-party hardware, firmware and software used in high-performance digital multimedia products., • Assist with the design, develop and execute product and system test plans to create formal validation and verification, documentation, methods, and processes, design and build fixtures, automated test jigs, scripts, and demo and test systems., • Assist with the development and perform formal validation and verification testing, including interoperability, safety, environmental, accelerated life cycle testing, pursuant to compliance certification to 60601., • Document and analyze test results, including product hardware, firmware, & software verification and validation, using both manual and automated testing as needed., • Conduct product failure resolution by analyzing failure reports, devising, and executing experiments to reproduce one or more failure modes, and systematically localizing root cause(s)., • Generate and review accurate and thorough technical content, including software/firmware requirements, design specifications, and test protocols., • Generate internal and external documentation such as datasheets, user manuals, test methods and processes, etc., • Contribute input to schedules and task breakdowns., • Contribute to organization of common and dedicated lab work benches, storage, mechanical tools, 3D printers, and electronics tools and supplies.Job responsibilities within our organization are dynamic. This may not be a complete list of duties. Other responsibilities and duties may be assigned by your supervisor or upper management. Education & Experience • B.S. in Electrical Engineering or a related field., • 1-3 years of experience designing and/or testing multimedia hardware and systems., • Basic electrical circuit and mechanical design knowledge sufficient for design of test fixtures including basic wiring and computer interfacing., • Experience executing test plans to create formal validation and verification documentation for multimedia hardware, firmware & software products., • Hands-on, demonstrable experience and working knowledge of most or all of the following:, • Experience with printed circuit board assembly and testing, cable harness production, and ESD control., • Multimedia test equipment such as Quantum Data, Audio Precision, PHABRIX, • Standard lab equipment such as oscilloscopes, logic analyzers, signal analyzers, signal generators, spectrum analyzers, etc., • Basic Python to understand and modify complex scripts and write simple scripts, • Experience with bug scrubbing, bug tracking, and bug tracking software, • Building test units, harnesses, and jigs using mechanical and electronic assembly, • Multidisciplinary bring-up and debugging techniques and approaches, • PC (Windows/Linux) and Ethernet network/ IP network setup and configuration, • High speed video interfaces and protocols (composite to 4K60, HDMI/DP/DVI, SDI, SDVOE, streaming, color spaces, standards and temperatures, and timing & synchronization)Skills & Abilities, • Solid Electrical Engineering background with the ability to read, understand, create, and edit multimedia PCB schematics, familiarity with basic FPGA/SoC/processors, memory systems, power subsystems including linear and switching topologies, and serial interfaces., • Strong team player who can work collaboratively with a diverse team to identify root cause of complex system problems, for both internally reported failures as well as customer RMAs, using Ishikawa/fishbone analysis to find effective, practical solutions quickly., • Detail-oriented effective communicator with excellent customer-ready documentation and communication skills and ability to develop, use, and socialize document templates to streamline processes., • Ability to provide completion time estimates for a given set of test requirements., • Ability to be hands-on with soldering, assembly, and testing., • Ability to work with very little supervision, prioritize between multiple tasks, meet aggressive deadlines, and work extended hours (as needed)., • Highly responsible and committed to thrive in an energetic, fast-paced, evolving, high growth environment while adhering to aggressive deadlines, and coordinating cross-functional teams., • Strong self-motivation and attitude for personal career growth, willingness to self-learn, and work in new technology domains.Compensation & Benefits, • Salary: $75,000 - $100,000 annual base salary (based on experience and qualification), • Medical, vision and dental insurance, • 401(k) with company match (100% of the first 4% in eligible compensation), • Flexible Spending Account, • 2 weeks paid vacation, • 1 Week sick pay, • 10 company holidays, • Group life insurance Powered by JazzHR x3DjWSrEU6

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Lead Test Engineer, Power Generation to own the strategy, execution, and team leadership for testing the power generation system including turbomachinery, heat exchangers, controls, and primary cooling systems. This role is ideal for a hands-on technical leader who enjoys building test infrastructure, running complex hardware, and mentoring engineers and technicians while remaining deeply involved in day-to-day testing. You will lead testing development for our high-speed machinery and own creating our test site from the ground up. This test infrastructure will be used to iterate quickly on our designs evaluating vibration, performance, thermal behavior, and system reliability in development and transition into acceptance testing for production units. This role works closely with mechanical design, analysis, manufacturing, and operations teams to ensure turbomachinery designs are validated, robust, and production-ready. Responsibilities & Duties: Test Site & Infrastructure Development Lead requirements definition, design, and implementation of Radiant’s test site. Design, build, commission, and maintain test rigs, fixtures, instrumentation, and support systems for turbomachinery, heat exchangers, controls, and primary cooling systems. Establish operating procedures, safety controls, and facility readiness for high-speed, high-energy, and high-temperature test environments. Test Strategy, Planning & Technical Ownership Own and lead the turbomachinery test strategy across development, qualification, and production acceptance phases. Define test objectives, plans, success criteria, instrumentation strategies, and data requirements for high-speed rotating machinery and supporting thermal-fluid systems. Serve as the technical authority for vibration, rotordynamic, and bearing-related testing. Translate analytical predictions (critical speeds, stability margins, transient response) into targeted test campaigns that validate design assumptions and retire risk. Balance test coverage, technical risk, schedule, and hardware availability to enable rapid iteration while maintaining safety and rigor. Test Execution & Data Analysis Plan and execute development, qualification, and acceptance tests including startup/shutdown, transient, off-design, and endurance testing. Operate test hardware hands-on with a strong emphasis on repeatability, data quality, and safety. Analyze test data to assess vibration behavior, rotordynamic stability, bearing performance, thermal response, and overall system performance. Compare test results against analytical predictions and work with design teams to resolve discrepancies. Collaborate with mechanical engineers to conduct root cause investigations, identify anomalies or failures, and implement corrective actions supported by test evidence. Technical Leadership & Team Development Provide technical leadership and mentorship to test engineers and technicians. Act as a player-coach: remain hands-on while scaling testing capability, throughput, and organizational maturity. Support hiring, onboarding, and technical development of turbomachinery test personnel. Develop work estimates, test schedules, and status updates for program leadership. Review and approve test procedures, reports, and data packages. Establish standards for test documentation, data management, and knowledge capture. Help mature Radiant’s turbomachinery test processes, labs, and safety culture over time. Cross-Functional Collaboration Partner closely with turbomachinery mechanical engineers to ensure designs are testable and adequately validated. Review component and system-level design documentation with an eye toward test coverage, instrumentation, and risk. Collaborate with thermal, manufacturing, quality, and operations teams to support prototype, first-article, and production hardware testing. Represent testing in design reviews, test readiness reviews, and technical leadership discussions. Required Qualifications & Skills: Bachelor’s or Master’s degree in Mechanical Engineering or a related field, or equivalent experience. 8+ years of experience in testing, development, or validation of turbomachinery, rotating equipment, or complex mechanical systems. Hands-on experience testing high-speed rotating machinery and high-temperature hardware. Experience correlating test results with analytical predictions and design intent. Demonstrated technical leadership and ability to drive complex test efforts to completion. Strong written, verbal, and organizational skills. Desired Qualifications & Skills: Prior experience leading or mentoring test engineers or technicians. Experience with power generation or other high-reliability power generation systems. Strong understanding of rotordynamics, vibration, and bearing behavior as applied to real hardware testing. Familiarity with rotordynamic analysis tools (e.g., XLrotor, Dyrobes, or equivalent) from a test correlation or validation perspective. Familiarity with relevant industry standards (API, ASME, ISO). Startup or fast-paced hardware development experience. Prior nuclear experience is not required. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $158,000 - $247,275

Job DescriptionAbout Us At Arbor Energy & Resources Corporation ("Arbor Energy"), we're creating technology to power our lives while protecting the planet that sustains them. Our advanced power systems deliver clean, reliable baseload electricity with zero operating emissions—modular, fuel-flexible, and engineered for the realities of today's energy demand. At the core is a supercritical CO₂ turbine with integrated carbon capture, designed to bring carbon-neutral power online quickly at meaningful scale. Our team includes aerospace engineers, combustion experts, and systems thinkers with a shared goal: to build technology worthy of the world we want to live in. While many of us began our journeys looking to the stars, we're applying that expertise here at home to deliver dependable, emission-free baseload power and a future of lasting abundance. If you share our values and are drawn to rigorous work with lasting impact, we'd love to learn more about you. Come build what the future will run on. Steward our planet: We build for tomorrow, ensuring every bolt we tighten and every hand we lend leaves our environment stronger than we found it. Lead with Love: We champion the success of our people, partners, and planet, nurturing excellence through camaraderie and rigor. Explore the Uncharted: We embrace the unknown with curiosity, using courage and discipline to transform uncertainty into opportunity. Role Overview We're seeking a Network and Systems Engineer to own the deployment, performance, and scalability of our network infrastructure across current operations and upcoming facility expansions. You'll architect and execute network solutions, manage enterprise identity across Azure and Google Workspace, and serve as the technical authority on all infrastructure and security decisions. This is a hands-on role that requires both strategic thinking and tactical execution. The ideal candidate thrives in fast-paced, hardware-focused environments and operates with a high degree of autonomy. This is an onsite opportunity in our El Segundo, CA office. Responsibilities Network Architecture & Infrastructure • Design and execute enterprise and mission-critical network architectures across offices, test facilities, and remote environments, with deep hands-on expertise in routing protocols (BGP, OSPF), L2/L3 design, VPC/VDC, Spanning Tree, VRF, VTP, VLANs, VPNs, site-to-site connectivity, and secure tunneling architectures., • Lead end-to-end infrastructure buildout for our new headquarters and manufacturing facilities — scoping, installing, and validating physical cabling, switches, firewalls, and wireless security appliances in collaboration with contractors., • Implement QoS policies to prioritize critical data streams; monitor performance, proactively identify bottlenecks, and resolve complex connectivity issues., • Design and maintain scalable, resilient network infrastructure capable of supporting high-throughput automated operations as we scale. MSP Governance & Enterprise Systems Oversight • Serve as the primary technical authority and escalation path for our outsourced IT partner, holding them accountable to SLAs covering tier-1/tier-2 helpdesk, device procurement, provisioning, and end-user onboarding — this role owns the outcomes, not the tickets., • Define, audit, and enforce configuration standards across enterprise systems managed by the MSP: Windows Server, Linux (RHEL, Ubuntu, CentOS), Active Directory, DNS/DHCP, hybrid cloud, and virtualization platforms (VMware / Hyper-V)., • Govern identity and access management across Azure AD / Entra ID and Google Workspace, including SSO and MFA policies — you don't need to be a deep cloud sysadmin, but you need to own the standards and hold the MSP to them., • Oversee infrastructure lifecycle management: backup and DR strategies, endpoint policies, patching routines, and server provisioning — directing execution through the MSP rather than doing it yourself. OT, Data Pipelines & AI Infrastructure • Support secure integration of edge automation hardware, PLCs, SCADA, and data acquisition systems with backend infrastructure, maintaining strict isolation between corporate and testing environments., • Partner with software and systems teams on data ingestion pipelines, telemetry infrastructure, and real-time monitoring dashboards., • Design network containment and isolation layers for AI tools and automated workflows to ensure data security and audibility. Security & Compliance • Partner with external compliance advisors and the MSP to implement and maintain network-level controls for NIST 800-171 and CMMC within a Zero Trust framework., • Manage transport-layer security and encryption standards (TLS, OpenSSL, SHA-256); coordinate system hardening and vulnerability assessments through the outsourced security team., • Develop and own security policies for endpoint management, VPN access, and data protection — setting the standard, not necessarily executing every control.Requirements, • 8+ years of experience in IT systems engineering or infrastructure roles, • Deep expertise in network protocols and fundamentals: TCP/IP, VLANs, BGP, OSPF, MPLS, routing, switching, firewalls, • Strong understanding of networking design models (L2/L3, VPC, VDC, Datacenter Zones, Spanning Tree, VRF, VTP, VLANs, and cabling), • Hands-on experience with at least one major cloud platform (AWS, Azure, or GCP), • Proven experience managing Windows Server, Linux (RHEL, Ubuntu, CentOS), and Active Directory environments, • Strong knowledge of systems security, access control, hardening, and encryption protocols, • Experience with identity and access management frameworks (Azure AD, Entra ID, Google Workspace, SSO/MFA), • Proficiency in scripting and automation using PowerShell, Bash, Python, or similar, • Ability to work independently, make high-impact technical decisions, and lead projects from planning through execution, • Strong documentation habits and ability to communicate technical concepts clearly to non-technical stakeholdersPreferred Qualifications, • Familiarity with IEEE 1588 Precision Time Protocol (PTP) and experience designing or supporting time-synchronized network architectures for data acquisition, telemetry, industrial control, or distributed systems environments is preferred., • Experience with real-time data acquisition systems, time-series databases (QuestDB, InfluxDB), or industrial control environments, • Familiarity with edge automation hardware (Opto22, PLCs) or industrial networking protocols, • Background in regulated or compliance-driven environments (defense, aerospace, critical infrastructure), • Experience with monitoring and observability tools (Grafana, Prometheus, Datadog), • Certifications such as CCNP, CCIE, Network+, MCSE, Security+, or relevant industry credentials, • Familiarity with NIST frameworks (800-171, 800-53) or CMMC standards, • Experience with IaC tools like Terraform, Ansible, or similar configuration management platformsCompensation & Benefits, • Pre-IPO stock options, • Medical, dental, and vision insurance (Arbor covers 90% for employees), • Basic life insurance fully covered, • Health savings account (HSA) with matching, • Flexible savings account (FSA), • Unlimited PTO, • 12+ company holidays, including Earth Day!, • 401(k), • Commuter benefits, • Annual learning and development stipend, • And more! Base Pay: $140,000 - $165,000 USD/year. The salary is subject to the applicant's skills, qualifications, experience, and geographic location. Our Commitment Arbor Energy is proud to be an equal opportunity employer. We evaluate qualified applicants without regard to race, religion, national origin, gender identity or expression, sexual orientation, age, marital or veteran status, disability, or any other protected characteristic under applicable law. Solving global energy challenges requires a wide range of perspectives and experiences, and we are committed to building a team that reflects the world we serve. Our hiring process is designed to be accessible, fair, and focused on the work that matters most for this role. Reasonable accommodations are available throughout the hiring process and employment—please let us know if you need one.

Job DescriptionDescriptionAs a Test Hardware Engineer at Impulse, you will design, build, deploy, and support the common electrical test hardware that powers our test infrastructure. You will create standardized, reusable building blocks for test engineers, including rack-mounted DAQ and control units, mobile DAQ systems, test carts, rack-mounted pressure controllers, thermal chamber support hardware, power distribution assemblies, and electrical interface boxes. In this role, you will collaborate closely with test operations, software automation engineers, IT, and other cross-functional teams to ensure rapid, reliable deployment of test assets. Responsibilities • Design, implement, and maintain common electrical test hardware platforms for DAQ, controls, instrumentation, power distribution, networking, and computer-integrated test assets., • Create and maintain electrical schematics, wiring diagrams, panel layouts, cable designs, bills of materials, assembly instructions, checkout procedures, and operating documentation., • Develop standardized hardware architectures that allow test engineers to quickly assemble safe, reliable, maintainable, and reusable test systems., • Participate in the full hardware lifecycle-from requirements and design through procurement, fabrication, integration, commissioning, deployment, maintenance, and improvement., • Work closely with software automation engineers during design, deployment, integration, checkout, and troubleshooting of standard test assets., • Coordinate with IT and the test automation engineers to define, image, configure, and maintain computers used in standard test assets., • Diagnose and resolve issues across electrical hardware, software interfaces, networking, and test infrastructure with resourceful, hands-on problem-solving. Minimum Qualifications • Bachelor's degree in electrical, aerospace, mechanical, or related engineering discipline., • 2+ years of hands-on experience designing, building, integrating, or operating electrical test hardware, laboratory equipment, industrial automation systems, or similar engineering hardware., • Experience creating and maintaining electrical schematics, wiring diagrams, bills of materials, and assembly documentation., • Experience with EPLAN or similar electrical design tools., • Working knowledge of data acquisition, instrumentation, sensors, controls, wiring, power supplies, networking, and electrical system integration., • Hands-on experience with hardware checkout, commissioning, troubleshooting, and operation in a fast-paced environment. Preferred Skills and Experience • 4+ years of hands-on experience designing, building, integrating, or operating electrical test hardware, laboratory equipment, industrial automation systems, or similar engineering hardware., • Strong EPLAN experience, including project structure, device tagging, terminal blocks, wire numbering, panel layouts, reports, and drawing release workflows., • Experience designing modular or reusable test hardware platforms rather than one-off test equipment., • Experience with NI, Beckhoff, ifm, PLCs, real-time control systems, IO-Link devices, Ethernet/IP devices, EtherCAT devices, or other industrial automation hardware., • Experience designing low-voltage electrical systems, cable harnesses, grounding schemes, interlocks, and general E-stop or safety circuits., • Experience wiring, integrating, and troubleshooting power supplies, signal conditioning hardware, network switches, DAQ chassis, controllers, remote I/O, and industrial electrical components., • Mechanical design experience for test hardware, including enclosures, carts, racks, brackets, sheet metal, and serviceable assemblies., • Experience with Teamcenter, PLM systems, engineering release workflows, technician training, or configuration-controlled hardware documentation. Travel · Occasional travel to test sites to support new test asset bring-up, onsite debugging, and coordination with test teams. Travel is planned and infrequent, focused on high-impact activities. Additional Information: Compensation bands are determined by role, level, location, and alignment with market data. Individual level and base pay is determined on a case-by-case basis and may vary based on job-related skills, education, experience, technical capabilities and internal equity. In addition to base salary, for full-time hires, you may also be eligible for long-term incentives, in the form of stock options, and access to medical, vision & dental coverage as well as access to a 401(k) retirement plan. Impulse Space’s spacecraft manufacturing business is subject to U.S. export regulations including the International Traffic in Arms Regulations (ITAR) and Export Administration Regulations (EAR). This position requires applicants to be either U.S. Persons (i.e., U.S. citizen, U.S. national, lawful permanent U.S. resident (green card holder), an individual granted asylum in the U.S., or an individual admitted in U.S. refugee status) or persons eligible to obtain an export license from the U.S. Departments of State, Commerce, or other applicable U.S. government agencies. Learn more about the ITAR here. Impulse Space is an Equal Opportunity Employer; employment with Impulse Space is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Staff Loads & Dynamics Engineer to own and execute structural loads, vibration, and dynamic analyses for complex mechanical systems associated for Kaleidos, the world's first portable microreactor and supporting hardware. You will play a critical role in ensuring structural integrity and survivability across all phases of the product lifecycle, including manufacturing, transportation, handling, deployment, and operational environments. This role requires a hands-on engineer who is comfortable working in ambiguous, fast-paced environments and collaborating closely with structures, mechanical design, thermal, nuclear, and test teams. Responsibilities & Duties: Develop and own static, dynamic, and transient loads for reactor systems, support structures, and transport configurations. Perform structural dynamics analyses, including modal, random vibration, shock, sine vibration, and fatigue assessments. Implement explicit dynamics simulations to model nonlinear reactor response under transient seismic and transportation event cases. Define and analyze transportation and handling environments, including shock and vibration from road, rail, air, or sea transport. Generate load cases and environments to support structural sizing, design margins, and verification plans. Conduct finite element analyses (FEA) using tools such as ANSYS, Abaqus, or similar tools. Collaborate with design engineers to influence hardware architecture, material selection, and joint design. Support test planning and correlation, including shaker tests, modal surveys, and structural verification testing. Develop and maintain analysis documentation, reports, and requirements for internal reviews and regulatory interfaces. Contribute to failure investigations, root cause analyses, and design improvements Help establish best practices for loads, dynamics, and structural verification within a growing engineering organization. Required Qualifications & Skills: Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, Structural Engineering, or a related field. 5+ years of experience in loads, dynamics, or structural analysis for complex mechanical systems. Strong fundamentals in structural mechanics, dynamics, and vibration. Experience with finite element modeling and analysis of metallic and composite structures. Proficiency with industry-standard FEA tools (e.g., ANSYS, Abaqus, Nastran). Familiarity with design allowables, safety factors, and margin-of-safety methodologies. Ability to work cross-functionally and communicate analysis results clearly to both technical and non-technical stakeholders. Desired Qualifications & Skills: Experience in aerospace, launch, defense, nuclear, or heavy industrial hardware environments. Dynamics modeling software experience (LD-Dyna, Abaqus explicit, or other). Background in shock and vibration testing and test-article correlation. Knowledge of fatigue, fracture mechanics, and bolted joint analysis. Experience defining or interpreting environmental specifications and requirements. Master’s degree or PhD in a relevant engineering discipline. Familiarity with nuclear, spaceflight, or safety-critical system requirements. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $162.5K - $228.8K

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About your Role We are seeking for a Build Engineer to help bring high-speed rotating hardware from design into reality. This is a hands-on role ideal for new graduates or early-career engineers who want to learn by building, assembling, and integrating complex turbomachinery systems. You will work closely with design, test, and manufacturing teams, helping prepare hardware for first-article testing and system validation. This is a fantastic opportunity to gain real-world experience with high-speed, high-temperature rotating machinery while making a direct impact on a first-of-its-kind nuclear microreactor program. Responsibilities & Duties: Hands-On Builds & Assembly Responsible for assembly and integration of prototype and first-article turbomachinery. hardware, including compressors, turbines, rotors, electric motors, bearings, seals, and housings. Develop precise assembly instructions, alignment procedures, and torque specifications. Support rotor stacking, bearing installation, balancing, and alignment operations. Document assembly activities, as-built observations, and lessons learned. Process & Tooling Support Help develop and maintain build tools, fixtures, and work-holding solutions. Support creation of work instructions and standard operating procedures for assembly processes. Provide feedback to design and manufacturing teams to improve hardware assembly and integration. Cross-Functional Collaboration Work closely with design engineers, test engineers, and technicians to prepare hardware for testing and validation. Participate in troubleshooting assembly issues and contribute to iterative improvements. Receive mentorship from senior build engineers while gradually taking on more responsibility. Learning & Growth Gain experience with high-speed rotating machinery, tight tolerances, and precision assembly. Learn industry best practices for turbomachinery build, integration, and first-article readiness. Develop problem-solving skills and hands-on engineering judgment in a fast-paced startup environment. Required Qualification & Skills: Bachelor’s degree in Mechanical Engineering or a related field (or expected graduation within 6 months). Strong interest in hands-on mechanical assembly, rotating machinery, or turbomachinery systems. Basic understanding of GD&T, fits, torque, and alignment principles. Comfort reading and interpreting mechanical drawings and CAD models. Willingness to learn, take initiative, and work safely with precision hardware. Desired Qualifications & Skills: Prior hands-on experience from internships, co-ops, class projects, or design competitions (SAE, Formula SAE, robotics, etc.). Familiarity with mechanical assembly, rotor balancing, or bearing handling. Interest in turbomachinery, power generation, or high-speed rotating systems. Excited to work in a fast-paced, innovative startup environment. Prior nuclear experience is not required. Additional Requirements: Must be willing to work extended hours and occasional weekends to support build schedules. Must work 100% onsite at Radiant’s El Segundo headquarters. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $74K - $130K

Job Description Divergent is a technology company that has architected, invented, built, and commercialized an end-to-end factory system called the Divergent Adaptive Production System (DAPS) that comprehensively uses machine learning to optimally engineer, additively manufacture, and flexibly assemble complex integrated vehicle structures and subsystems. Products created using DAPS are superior in performance, lower in cost, rapidly customizable to meet mission and customer-specific requirements, faster to market, and scalable on demand to high volume production. Divergent is a qualified Tier 1 supplier to global automotive OEMs, and Divergent is now expanding to support mission critical needs in the Aerospace and Defense sector. Join us to be a part of this transformative journey, where your impact will shape the future of technology and production. Purpose Divergent is seeking a Senior Principal, Business Development and Head of Air Force Strategy to lead the company's strategic engagement with the Department of the Air Force and drive long-term business growth with key industry partners. This role is responsible for defining and executing Divergent's Air Force strategy, identifying and developing transformational partnership opportunities, influencing corporate growth initiatives, and securing strategic programs that accelerate adoption of the Divergent Adaptive Production System (DAPS) across Air Force missions. The Senior Principal serves as a senior advisor to executive leadership on Air Force market strategy and is responsible for shaping long-term customer engagement, strategic partnerships, and business growth within one of the company's highest-priority defense markets. This position reports to the VP of Corporate and Strategic Partnerships and works closely with Executive Leadership, the Capture team, Engineering, Program Management, and other cross-functional stakeholders. The Role Key Account Management • Own the company's most strategic Air Force and defense industry relationships, establishing executive-level engagement strategies and driving long-term account growth aligned with corporate objectives and revenue priorities., • Develop and execute account growth strategies that position Divergent for expanded adoption across Department of the Air Force organizations and mission areas. Strategy Development • Develop, own, and continuously evolve Divergent's long-term Air Force strategy by identifying emerging mission needs, acquisition pathways, funding opportunities, executive stakeholders, and strategic partnerships that position the company for sustained growth., • Advise executive leadership on market trends, competitive positioning, customer priorities, and strategic investment opportunities that support the company's long-term Aerospace & Defense growth strategy. Business Development • Lead enterprise-level business development initiatives, establish strategic partnerships, influence customer investment priorities, and expand Divergent's presence across the Department of the Air Force and the broader defense ecosystem., • Identify and cultivate new markets, strategic partnerships, and growth opportunities that expand the adoption of Divergent's technologies. Business Capture • Lead the capture and negotiation of strategically significant partnerships and programs while shaping capture strategies that position Divergent for long-term growth across the Air Force portfolio., • Support proposal strategy, customer engagement planning, and opportunity maturation through contract award. Cross-Functional Leadership • Provide strategic leadership across Business Development, Capture, Engineering, Program Management, Finance, and Executive Leadership to align priorities and successfully execute complex growth initiatives., • Ensure alignment between customer requirements, technical capabilities, and business objectives. Executive Customer Engagement • Serve as an executive representative of Divergent with senior Department of the Air Force leadership, industry executives, and strategic partners., • Prepare executive briefings, customer engagement strategies, and presentation materials that support senior leadership interactions and strategic decision making. Risk and Opportunity Management • Identify strategic risks, competitive threats, and relationship challenges early and develop mitigation strategies that maintain momentum on critical partnerships and growth opportunities. Documentation & Compliance • Maintain accurate records within CRM systems, action trackers, and program documentation., • Ensure compliance with ITAR, DFARS, and applicable aerospace and defense industry standards. Metrics & Business Performance • Develop executive-level reporting, pipeline forecasting, strategic growth metrics, dashboards, and KPIs that enable data-driven decision making and measure business performance. Continuous Improvement • Lead initiatives that improve business development, capture, and strategic partnership processes while helping establish best practices across the Corporate and Strategic Partnerships organization. Basic Qualifications, • Senior leadership experience within or supporting the U.S. Air Force with a deep understanding of Air Force strategy, acquisition pathways, organizational structure, funding, and operational priorities., • Proven success leading business development, strategic partnerships, and growth initiatives within the national security or defense sector., • Demonstrated experience developing and executing long-term business strategies that drive measurable organizational growth., • Demonstrated experience influencing executive-level decision making and shaping long-term business strategy within the U.S. Department of Defense ecosystem., • Strong understanding of advanced manufacturing, defense innovation ecosystems, sustainment, and modernization programs., • Exceptional communication and executive presence with the ability to effectively engage senior government leaders, industry executives, engineering organizations, and executive leadership teams., • Demonstrated success leading cross-functional teams and guiding complex strategic initiatives from concept through execution., • Ability to lawfully access information and technology subject to U.S. export controls., • Minimum of 15 years of experience within the Aerospace & Defense industry., • Strong analytical and strategic thinking skills with the ability to identify opportunities, assess risk, and develop effective business solutions., • Ability to obtain and maintain a DoD Security Clearance. Preferred Qualifications, • Knowledge of additive manufacturing applications and/or munition weapon systems., • Active DoD Security Clearance., • Established relationships with senior Department of the Air Force leadership, defense industry executives, and major prime contractors., • Experience supporting or leading strategic capture efforts for large, complex defense programs. Work Environment, • This role will be remote with travel expectations to Torrance, CA, Long Beach, CA, and Washington, D.C. Compensation At Divergent, our pay range is based on the level of the job. For this role, we will consider candidates at levels S07- S08 as evaluated through our interview process. • Principal: $179,610 - $246,960, • Senior Principal: $207,420- $285,200Pay Range$179,610—$285,200 USD What We Offer: • Holistic Compensation Package: Enjoy a world-class compensation package that includes a competitive salary, equity plan, and discretionary results-based incentive bonus opportunities, ensuring you're truly valued for your contributions., • Wellness and Time Off: Embrace a healthy lifestyle with paid vacation, sick time, and company holidays, including a year-end shutdown to recharge. We support growing families with paid parental leave, recognizing the importance of bonding time., • Comprehensive Health and Wellness: Prioritize your well-being with our comprehensive health and wellness benefits, offering both HMO and Premium PPO options. Additionally, benefit from company-sponsored life insurance and short and long-term disability coverage for peace of mind., • Investment in Growth: We're committed to your professional development. Take advantage of reimbursement opportunities for learning and development initiatives, empowering you to continuously expand your skill set and reach peak performance., • Collaborative and High-Performing Environment: Join our collaborative, dynamic, and high-performing team within a fast-paced, mission-driven company. Together, we're disrupting the traditional manufacturing industry, fostering innovation, and integrating people and technology to reduce our footprint. Equal Employment Opportunity Divergent is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected characteristic. Divergent provides affirmative action in employment for qualified Individuals with Disabilities and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans' Readjustment Assistance Act. EEO Poster In order to adjust to changes in our business, it may become necessary to add, remove or modify certain duties and responsibilities, or to reassign you to another job position. From time to time you may be asked to work on special projects or to assist with other work. Your cooperation and assistance in performing such additional work is expected. E-Verify: Right to Work Our company participates in E-Verify. E-Verify is a program that electronically confirms a candidate's eligibility to work in the United States after completing the Employment Eligibility Verification (Form I-9). The information provided on the Form I-9 is compared to the records contained in the Social Security Administration and Department of Homeland Security (DHS) databases. This helps employers verify the identity and employment eligibility of newly hired employees. Eligibility to Work Poster (English) | Eligibility to Work Poster (Spanish) Los Angeles Fair Chance Initiative for Hiring Ordinance (FCIHO) Pursuant to the Los Angeles Fair Chance Initiative for Hiring Ordinance (FCIHO), we will consider for employment qualified applicants with arrest and conviction records. No agencies, no solicitations, and no calls please.

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a highly motivated Senior Structures Engineer to design and develop critical structures within Kaleidos. You will solve unique challenges creating efficient and reliable structures that facilitate fission while surviving extreme temperature environments and meeting volumetric constraints. You will be responsible for the following: trade studies, material selection, detailed structural analysis, assembly, integration, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026. Responsibilities & Duties: Ownership of critical structures such as mass-efficient transportable shielding systems, container system, and high temperature graphite and metallic systems. Conduct trade studies and develop designs to meet program requirements. Perform detailed thermomechanical analysis (static strength, durability/fatigue) and dynamic analysis (vibration, shock) to determine structural integrity (margins of safety) using both hand calculations and finite element tools. Develop and execute manufacturing/assembly instructions and test plans. Create and manage a Bill-Of-Materials (BOM). Find and develop suppliers for components. Own subassembly design, manufacturing, and test schedules. Own risk analysis (FMEA) for subsystems. Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. Required Qualifications & Skills: Bachelor’s degree from an accredited institution in Mechanical, Aeronautical, Civil or Structural Engineering. 6+ years of experience designing structures. 4+ years of experience performing stress analysis using both hand calculations and finite element tools (Abaqus, Ansys, FEMAP, or similar). Desired Qualifications & Skills: Experience with design of multi-component assemblies in CAD (NX or similar). Experience designing hardware that was manufactured, deployed, and iteratively improved. Experience resolving thermal expansion issues in designs. Experience working with interdisciplinary teams. Solid understanding and application of GD&T. Proficiency with both “hand calc” analytical methods and higher fidelity finite element-based analysis methods. Ability to derive free-body diagrams for systems with which one was not previously familiar. Self-motivated with strong organizational, written, and oral communication skills. Experience with using text-based software development tools. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133.5K - $184.8K

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a highly motivated Senior Structural Engineer to design and develop critical structures within Kaleidos. You will solve unique challenges creating efficient and reliable structures that facilitate fission while surviving extreme temperature environments and meeting volumetric constraints. You will be responsible for the following: trade studies, material selection, detailed structural analysis, assembly, integration, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026. Responsibilities & Duties: Ownership of critical structures such as mass-efficient transportable shielding systems, container system, and high temperature graphite and metallic systems. Conduct trade studies and develop designs to meet program requirements. Perform detailed thermomechanical analysis (static strength, durability/fatigue) and dynamic analysis (vibration, shock) to determine structural integrity (margins of safety) using both hand calculations and finite element tools. Develop and execute manufacturing/assembly instructions and test plans. Create and manage a Bill-Of-Materials (BOM). Find and develop suppliers for components. Own subassembly design, manufacturing, and test schedules. Own risk analysis (FMEA) for subsystems. Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. Required Qualifications & Skills: Bachelor’s degree from an accredited institution in Mechanical, Aeronautical, Civil or Structural Engineering. 6+ years of experience designing structures. 4+ years of experience performing stress analysis using both hand calculations and finite element tools (Abaqus, Ansys, FEMAP, or similar). Desired Qualifications & Skills: Experience with design of multi-component assemblies in CAD (NX or similar). Experience designing hardware that was manufactured, deployed, and iteratively improved. Experience resolving thermal expansion issues in designs. Experience working with interdisciplinary teams. Solid understanding and application of GD&T. Proficiency with both “hand calc” analytical methods and higher fidelity finite element-based analysis methods. Ability to derive free-body diagrams for systems with which one was not previously familiar. Self-motivated with strong organizational, written, and oral communication skills. Experience with using text-based software development tools. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133.5K - $184.8K

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a highly motivated Senior Equipment Engineer who will be working closely with design engineers and the manufacturing team to develop and innovate custom equipment to build and assemble our microreactor system. You will be part of the early team that develops production equipment for the factory that will mass produce, fuel, and refuel Kaleidos. Responsibilities & Duties: Partner with design and manufacturing engineers to develop innovative production equipment for fabricating and assembling complex mechanisms and structures. Design, analyze, and fabricate equipment that enables semi-remote operations for fueling/defueling of the reactor. Identify and develop appropriate suppliers for components and fabrication. Required Qualifications & Skills: Bachelor’s degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline. 4+ years of experience in mechanical equipment design and fabrication of multi-component assemblies in CAD (NX or similar). Solid understanding of Geometric Dimensioning & Tolerancing (GD&T) with experience applying it to fabrication drawings. Desired Qualifications & Skills: Master’s degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline. Proficiency with both “hand calc” analytical methods and higher fidelity finite element-based analysis methods. Self-motivated with strong organizational, written, and oral communication skills. Experience with custom machine design; electromechanical systems, motors, actuators, linear rails, bearings, lifting/rigging, etc. Strong problem-solving skills and attention to detail. Demonstrated ability to work collaboratively with design and operations teams. Additional Requirements: Must be willing to work extended hours and weekends as necessary to achieve company goals. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133.5K - $184.8K

Job Description Senior Motor Design Engineer Radiant is seeking a talented Senior Motor Design Engineer to design and develop an alternator for the nuclear-driven, high-speed power generator. Responsibilities include but are not limited to the design of active parts, and the structural and thermal analysis of high-speed generators.You will collaborate with engineers cross-functionally and partner closely with the Power Conversion and Electrical Systems team responsible for converting mechanical energy to electrical to be delivered to customers safely and reliably. The successful candidate will own active part design of generators, along with performing analysis, simulation, and component selection. You'll make a big impact in commercializing Earth's first mass-produced nuclear reactors and power remote areas and critical infrastructure with abundant clean energy. Responsibilities and Duties: Own design, development, and integration of high power alternator and primary loop motor for a nuclear power generator Apply electromagnetic design and testing for a closed-loop Brayton cycle and its electric motor/generator components Create 3D models and 2D fabrication drawings in CAD and NX Own communications with vendors to source all components to build the generator Perform bench testing, dynamic testing, and system testing for all subsystem components and models Perform hands-on assembly, rapid prototyping, and integration of high voltage electric motors and generators Required Skills and Qualifications: B.S. in Electrical Engineering, or mechanical engineering specializing in power electronics 5+ years of design experience designing high-voltage and high-power electric motors and/or generators Fundamental knowledge of electric motors Expert in design of different types of permanent magnet motors in +1kV, +1MW applications with speeds +40krpm Desired Skills and Qualifications: 8+ years of generator design M.S in Electrical Engineering, or Mechanical Engineering specializing in power electronics Knowledge of motor control systems including SVM Deep understanding of Power Electronics and interaction of electronics circuits with electromagnetics components Define and optimize generator requirements and update design to comply with system level limitations and specifications Great team player with one team mentality working with turbomachinery, power electronics, thermal, packaging and software teams Additional Requirements Must be willing to work extended hours and weekends as necessary to accomplish our mission Must work 100% onsite at El Segundo HQ Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $158,000 - $247,275

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a highly motivated Senior Mechanical Engineer to own critical Kaleidos fluid systems from preliminary design through build and production. These systems include the primary loop subsystems and power conversion loop, serving to convert heat from the reactor core into electrical power. You will be responsible for the following: trade studies, component selection, thermal hydraulic analysis, piping design, vendor selection, assembly, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026. Responsibilities & Duties: Own end-to-end engineering of fluid systems and components, including compressors, valves, and heat exchangers. Perform complex thermal and fluids analysis to drive design decisions, verify system performance, and ensure structural integrity using first-principle hand calculations and finite element tools. Perform trade studies to optimize system and meet program requirements. Develop and execute manufacturing/assembly instructions and test plans. Create and manage a Bill-Of-Materials (BOM). Find and develop suppliers for all components. Own subassembly design, manufacturing, and test schedules. Own risk analysis (FMEA) for subsystems. Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. Required Qualifications & Skills : Bachelor’s degree from an accredited institution in Mechanical, Materials, Aeronautical, Civil or Structural Engineering. Experience with fluid system architecture design. 4+ years of experience in designing, building, and testing fluids systems. Proficient knowledge in fluid dynamics and thermodynamics. Proficient knowledge of heat exchanger design and analysis methods. Desired Qualifications & Skills : Knowledge of thermodynamic power cycles. Prior experience with designing piping system for thermal growth using hand calculations and FEA tools. Experience with process piping design and testing codes, such as ASME B31.3 and ASME PCC-2. Prior experience with fluid system modeling via Matlab/Python. Experienced in design for manufacturability and ramping up hardware build in a production environment. Experienced in designing and operating test stands. Takes extreme ownership of work and a high degree of responsibility. Excellent communication across multidisciplinary teams. Prior nuclear experience in not required for this role. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $158,000 - $219,450

Job Description Electrical Engineer Team Lead - Mission Critical HED is looking to add an experienced team member to our group of talented Electrical Engineers. The Electrical Engineer is a senior technical leader responsible for the design, oversight, and delivery of large complex electrical engineering projects focused on hyperscale data centers within the mission critical sector. This position will also lead and manage an offshore electrical engineering team. About HED We are a team that is full of ideas, experience, creativity, passionate opinions, insatiable curiosity, uncompromising integrity, commitment, and skill. Our culture is about aspiration, embracing change and challenges, listening to (and learning from) each other, encouraging continual learning, and inspiring collective growth. As an inclusive, integrated architecture and engineering practice, we value the diversity of perspectives, experiences, abilities, and expertise that advance both the work we do, and the world we share. Position Summary This role provides strategic direction for electrical system design, interdisciplinary coordination, QAQC leadership, and technical excellence throughout all phases of project delivery. Serving as both a technical expert and Engineer of Record, the Electrical Engineer assumes responsible charge over assigned projects, ensuring code compliance, design integrity, and high-quality engineering outcomes. In addition to project leadership responsibilities, this position oversees and mentors offshore engineering teams, managing production workflows, technical coordination, staffing alignment, and quality standards across distributed project teams. The role acts as a key liaison between clients, consultants, contractors, and internal leadership, driving successful project execution while advancing firmwide engineering standards, innovation, and professional development initiatives. This position requires strong leadership, advanced technical expertise, sound engineering judgment, and the ability to manage complex project challenges in a collaborative, fast-paced environment. Essential Functions • Lead, manage, and participate in selection of offshore electrical engineering production teams, including assignment delegation, workflow coordination, technical oversight, and quality assurance across multiple concurrent projects., • Establish clear communication protocols, production standards, and delivery expectations between domestic and offshore project teams to ensure schedule alignment and technical consistency., • Review, mentor, and approve offshore team deliverables, ensuring adherence to firm standards, applicable codes, project requirements, and QAQC procedures., • Coordinate staffing utilization and production planning for offshore resources in collaboration with project managers, discipline leadership, and operations teams., • Serve as the primary technical liaison between offshore design teams and internal project leadership, resolving design questions, workflow issues, and coordination challenges., • Develop scalable processes, documentation standards, and training initiatives that support efficient integration of offshore engineering resources into project delivery workflows., • Monitor offshore team performance metrics related to quality, responsiveness, productivity, and technical accuracy, providing coaching and corrective guidance as needed., • Serve as Engineer of Record (EOR) for assigned projects, assuming responsible charge for electrical system design, technical accuracy, code compliance, and signed/sealed construction documents where licensed., • Review and approve final electrical drawings, specifications, calculations, and engineering deliverables prior to issuance for permit, bidding, and construction., • Maintain accountability for compliance with applicable building codes, energy codes, life safety standards, and jurisdictional requirements across assigned projects., • Participate in client presentations, authority having jurisdiction (AHJ) meetings, and construction coordination discussions as the responsible engineering representative for electrical scope., • Provide leadership in managing technical risk, design liability, and engineering decision-making associated with projects under responsible charge., • Mentor junior engineers and electrical designers, providing real-time coaching, delegation guidance, and professional development support., • Collaborate with project managers and firm leadership on fee development, staffing strategies, and discipline resourcing for electrical work., • Lead technical segments of meetings with clients, building officials, and consultants, communicating electrical design direction and resolving complex issues., • Guide electrical response strategies to field conditions, code conflicts, and VE proposals with clarity and ownership., • Influence client expectations around quality, performance, technical decisions, and lifecycle outcomes of electrical systems. Requirements • Bachelor’s degree in electrical engineering or equivalent required., • P.E. licensure required., • 15+ years in the AEC Industry required., • Demonstrated experience leading and coordinating offshore or distributed engineering production teams required., • Proven ability to manage multidisciplinary workflows across multiple time zones while maintaining project quality, schedule, and communication standards required., • Experience serving as Engineer of Record for large complex projects with focus on data center projects required., • Active Professional Engineer (P.E.) licensure in applicable U.S. jurisdictions required; NCEES member and ability to obtain additional state registrations as needed preferred., • Strong understanding of responsible charge requirements, engineering ethics, document control, and professional practice standards required., • Experience reviewing and sealing electrical construction documents, specifications, and engineering calculations required., • Ability to mentor technical staff, lead production teams, and influence engineering standards across geographically diverse teams required., • Strong leadership, conflict resolution, and team development skills required., • Experience implementing QAQC procedures across remote or hybrid engineering delivery models preferred., • Excellent communication and coordination skills with clients, contractors, consultants, and international team members required., • Revit experience required., • Experience with computers, specifically for word processing, spreadsheet use/creation and email required., • Detail-oriented, self-motivated, enthusiastic, flexible and curious personalities required., • Ability to work well with others under deadline situations required. Physical Requirements • Prolonged periods of sitting at a desk and working on a computer., • Must be able to effectively communicate in writing and verbally via phone, video conferencing, and in-person., • Visual acuity to perform responsibilities. Work Environment • We embrace a hybrid model that promotes both autonomy and collaboration, including the freedom to work from home, with regular in-office days to connect with teammates and build culture., • The office is a professional, open-space environment for collaborative and independent work. Other Duties Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

Job Description Senior Mechanical Engineer (Structures) Radiant is seeking a highly motivated Senior Mechanical Engineer to design and develop critical structures within Kaleidos. You will solve unique challenges creating efficient and reliable structures that facilitate fission while surviving extreme temperature environments and meeting volumetric constraints. You will be responsible for the following: trade studies, material selection, detailed structural analysis, assembly, integration, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026. Responsibilities & Duties: Ownership of critical structures such as mass-efficient transportable shielding systems, container system, and high temperature graphite and metallic systems. Conduct trade studies and develop designs to meet program requirements. Perform detailed thermomechanical analysis (static strength, durability/fatigue) and dynamic analysis (vibration, shock) to determine structural integrity (margins of safety) using both hand calculations and finite element tools. Develop and execute manufacturing/assembly instructions and test plans. Create and manage a Bill-Of-Materials (BOM). Find and develop suppliers for components. Own subassembly design, manufacturing, and test schedules. Own risk analysis (FMEA) for subsystems. Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. Required Qualifications & Skills: Bachelor’s degree from an accredited institution in Mechanical, Aeronautical, Civil or Structural Engineering. 6+ years of experience designing structures. 4+ years of experience performing stress analysis using both hand calculations and finite element tools (Abaqus, Ansys, FEMAP, or similar). Desired Qualifications & Skills: Experience with design of multi-component assemblies in CAD (NX or similar). Experience designing hardware that was manufactured, deployed, and iteratively improved. Experience resolving thermal expansion issues in designs. Experience working with interdisciplinary teams. Solid understanding and application of GD&T. Proficiency with both “hand calc” analytical methods and higher fidelity finite element-based analysis methods. Ability to derive free-body diagrams for systems with which one was not previously familiar. Self-motivated with strong organizational, written, and oral communication skills. Experience with using text-based software development tools. Additional Requirements Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133.5K - $184.8K

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Mechanical Engineer to support the design and integration of electrical components and subsystems in a fast-paced startup environment. You’ll work alongside experienced mechanical and electrical engineers to solve challenging problems in packaging, thermal management, structural design, and system integration for advanced hardware. This role offers hands-on exposure to end-to-end hardware development from CAD and analysis through build, test, and validation. While contributing directly to Radiant’s mission to deploy the first successfully fueled commercial reactor in over 50 years by 2026. Responsibilities & Duties: Support the mechanical design and ownership of electrical components and subsystems, including: Mechanical design of electrical assemblies such as control panels, enclosures, brackets, mounts, and supports. Cable and wiring harness routing, retention, strain relief, bend radius compliance, and serviceability considerations. Packaging of sensors, actuators, connectors, and electrical hardware within constrained assemblies. 3D CAD modeling and 2D drawing creation using Siemens NX, including tolerance stack-ups and GD&T basics. Perform first-order load calculations (static, shock, vibration) to support structural design decisions. Conduct thermal analysis and heat-transfer assessments for electrical components, enclosures, and assemblies. Support selection of materials, fasteners, and finishes appropriate for electrical, thermal, and environmental requirements. Assist in the design and setup of test fixtures and test stands for acceptance and qualification testing. Participate in system integration, troubleshooting, and validation activities alongside electrical and systems engineers. Collect and interpret technical requirements and provide clear, constructive feedback across mechanical, electrical, software, and systems disciplines. Develop, document, and execute basic test plans and procedures to verify mechanical and thermal performance. Perform trade studies and first-order analyses to evaluate design options and constraints. Generate and maintain design documentation to support Design for Manufacturing (DFM), assembly, and serviceability. Support subassembly design, coordinate with manufacturing, and assist with build and test schedules. Required Qualifications & Skills: Bachelor’s degree in Mechanical Engineering or a closely related field from an accredited institution. 2+ Years of professional hands on mechanical design working experience. Experience using Siemens NX or similar 3D CAD tools. Familiarity with mechanical design of electrical assemblies, including enclosures, brackets, and harness routing principles. Basic understanding of structural mechanics, load paths, and first-order stress calculations. Introductory knowledge of thermal analysis, heat transfer, and thermal management concepts. Ability to read and create mechanical drawings, including dimensions and tolerances. Strong communication skills and ability to collaborate in a multidisciplinary engineering environment. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $1 - $130,000

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a highly motivated Mechanical Engineer, Fluids Systems to help own critical Kaleidos fluid systems from preliminary design through build and production. These systems include the primary loop subsystems and power conversion loop, serving to convert heat from the reactor core into electrical power. You will be responsible for the following: trade studies, component selection, thermal hydraulic analysis, piping design, vendor selection, assembly, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026. Responsibilities & Duties: Help own end-to-end engineering of fluid systems and components, including compressors, valves, and heat exchangers. Perform thermal and fluids analysis to drive design decisions, verify system performance, and ensure structural integrity using first-principle hand calculations and finite element tools. Perform trade studies to optimize system and meet program requirements. Develop and execute manufacturing/assembly instructions and test plans. Create and manage a Bill-Of-Materials (BOM). Find and develop suppliers for all components. Own subassembly design, manufacturing, and test schedules. Own risk analysis (FMEA) for subsystems. Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. Required Qualifications & Skills: Bachelor’s degree from an accredited institution in Mechanical, Materials, Aeronautical, Civil or Structural Engineering. Experience with fluid system architecture design. Experience in designing, building, and testing fluids systems. Proficient knowledge in fluid dynamics and thermodynamics. Proficient knowledge of heat exchanger design and analysis methods. Desired Qualifications & Skills: Knowledge of thermodynamic power cycles. Prior experience with fluid system modeling via Matlab/Python. Experienced in design for manufacturability and ramping up hardware build in a production environment. Experienced in designing and operating test stands. Takes extreme ownership of work and a high degree of responsibility. Excellent communication across multidisciplinary teams. Prior nuclear experience in not required for this role. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $105K - $125K

Job DescriptionCX2 is a next-generation defense technology company founded to deliver spectrum dominance for the United States and our allies. CX2’s AI-enabled hardware and software platforms detect, disrupt and defend the electromagnetic spectrum across land, air, sea and space domains. CX2 is seeking a skilled RF Hardware Engineer to join our growing team. The ideal candidate will have experience in designing, testing and building RF Systems (Tx / Rx) for RF signals (ex. communications, RADAR, navigation) UHF through X-Band. This role requires an onsite presence in our El Segundo, CA HQ; a remote work environment is not considered for this opportunity.Key Responsibilities • Design, validate & deliver RF payload subsystems: Design, Integration and Testing of Antennas, RF front ends, SDRs and provide validation of operation. Support development and analysis of RF performance metrics., • Own requirements, ICDs, and verification from concept through delivery, • Stay current: Track and insert advances in relevant technologies, SDRs, RF Systems, RF machine learning, and PNT.Qualifications, • BS/MS in Electrical Engineering, Computer Engineering, or related field, • Antenna and receiver design across analog/RF/mixed-signal domains: mixers, PLLs/LOs, gain/linearity/noise trades; ability to turn simulations into reality., • Channelizers & wideband architectures: filter banks, analog/digital down conversion, sample-rate planning, clocking/synchronization., • Willingness to support critical test events that occasionally require extended hours/weekends, • Ability to obtain and maintain a security clearance, • Must be a U.S. Person (see ITAR Regulations below) due to required access to U.S. export-controlled information or facilitiesBonus Points, • PhD in Electrical Engineering, Computer Engineering, or related field, • 5+ years’ experience with EW subsystems and payloads, • EA/ECM technique design (deception, Digital RF Memory, coherent/non-coherent techniques), • Digital Signal processing: Design characterize and deliver channelizers, wideband detection/classification, MIMO/digital-arrays, and algorithms in MATLAB/Python/C++, • Communication / Waveform system design, • RF machine learning for emitter ID, modulation/classification, anomaly detection, PDW creation, • Tools Experience: ADS/AWR/SystemVue, MATLAB/Simulink, Python (NumPy/SciPy), GNU Radio/SDR (USRP/RFSoC), VITA-49; HDL/firmware experience; also helpful (Vivado/Quartus/Libero)., • Clearance: Active Secret or ability to obtain and maintain; TS/SCI eligibility preferred. ITAR/EAR-controlled work. Learn more about Security Clearances here., • Field work: supporting periodic travel for flight tests and customer demonstrations/support, • Mindset: Builder-tester who loves first-principles RF, rapid lab iteration, and getting hardware flying fastWhat We Offer, • Competitive salary, stock options and benefits, including health, vision and dental., • 401K enrollment at 90 days., • Generous PTO + most Federal Holidays observed., • Collaborative and inclusive work environment., • Access to the latest tools and technologies., • High levels of responsibility and autonomy., • Professional growth and development opportunities., • Access to the hardest problems in electronic warfare.ITAR Regulations, • To conform to U.S. Government export regulations, applicant must be a US Citizen, Green Card holder, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here. Exact compensation may vary based on skills and experience.CX2 is a next-generation defense technology company securing spectrum dominance for the United States and its allies. We build AI-enabled hardware and software platforms to detect, disrupt, and defend the electromagnetic spectrum across land, air, sea, and space. Our systems are deployed in the most contested operational environments in the world. We’re backed by leading venture investors in the defense ecosystem and led by founders with track records at Meta, SpaceX, Epirus, and the U.S. Department of Defense. Equal Opportunity Employer CX2 is committed to equal employment opportunity. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender identity, sexual orientation, national origin, disability, veteran status, or any other protected characteristic under federal, state, or local law, including those with a criminal history, in compliance with the CA Fair Chance Initiative for Hiring Ordinance. To view CX2's privacy policy, please visit: https://www.cx2.com/privacy

Job Description Senior Mechanical Engineer (Sheet Metal Structures) Radiant is seeking a highly motivated Senior Mechanical Engineer to design and develop critical structures within Kaleidos. You will solve unique challenges creating efficient and reliable structures that facilitate fission while surviving extreme temperature environments and meeting volumetric constraints. You will be responsible for the following: trade studies, material selection, detailed structural analysis, assembly, integration, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026. Responsibilities & Duties: Ownership of critical structures such as mass-efficient transportable shielding systems, container system, and high temperature graphite and metallic systems. Conduct trade studies and develop designs to meet program requirements. Perform detailed thermomechanical analysis (static strength, durability/fatigue) and dynamic analysis (vibration, shock) to determine structural integrity (margins of safety) using both hand calculations and finite element tools. Develop and execute manufacturing/assembly instructions and test plans. Create and manage a Bill-Of-Materials (BOM). Find and develop suppliers for components. Own subassembly design, manufacturing, and test schedules. Own risk analysis (FMEA) for subsystems. Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. Required Qualifications & Skills: Bachelor’s degree from an accredited institution in Mechanical, Aeronautical, Civil or Structural Engineering. 6+ years of experience designing structures. 4+ years of experience performing stress analysis using both hand calculations and finite element tools (Abaqus, Ansys, FEMAP, or similar). Desired Qualifications & Skills: Experience with design of multi-component assemblies in CAD (NX or similar). Experience designing hardware that was manufactured, deployed, and iteratively improved. Experience resolving thermal expansion issues in designs. Experience working with interdisciplinary teams. Solid understanding and application of GD&T. Proficiency with both “hand calc” analytical methods and higher fidelity finite element-based analysis methods. Ability to derive free-body diagrams for systems with which one was not previously familiar. Self-motivated with strong organizational, written, and oral communication skills. Experience with using text-based software development tools. Additional Requirements Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133.5K - $184.8K

At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today's mission and stay ahead of tomorrow’s threat. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense. The Software Product Assurance Center’s Software Security Sensors and Effectors Department is seeking a skilled individual to join our software team to employ Agile development techniques on embedded targets to continuously develop and deploy critical capabilities to the warfighter. We strive for technical excellence by drawing upon a workforce whose knowledge base and experience covers the complete spectrum of modern computing languages and platforms. As a professional embedded software engineer, the candidate will be involved with software and firmware design, development, integration, and testing of real-time embedded solutions with application software, with a focus on overall system integrity. This role works side by side with Systems engineering to support generation of design concept and system architectural documentation. Responsibilities include the breakdown of architectural documentation in support of the generation and decomposition of requirements needed to support software development activities. The ideal candidate will also participate in Technical Integration Meetings with subcontractors to ensure selected hardware meets hardware and software requirements. Other aspects of the role consist of working individually or as part of a team to apply embedded principles to the design and development of hardened software applications. Our software applications are developed using C and C++ on a variety of computing platforms running Linux and other real-time operating systems. Lastly, the ideal candidate will ensure consistency across teams and remove impediments as they arise. This position is classified as: Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products. As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as onsite, hybrid or remote. • Requires a bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, Software Engineering, or related field., • 10+ years' realted experience, • Experience in an Agile and DevSecOps environment developing and maintaining software on an embedded processors/microcontroller., • Demonstrated ability to work closely across other engineering disciplines (Systems Engineering, Hardware Engineering, etc.) to debug system and board level issues using software tools, • Experience working in a Linux environment with ability to modify and maintain Linux Kernel root file systems, • Experience developing multi-threaded applications., • The ability to obtain and maintain a US security clearance. U.S. citizenship is required as only U.S. citizens are eligible for a security clearance, • Proficiency with RTOS Systems, Linux device drivers, and/or embedded Linux, • Experience developing and troubleshooting on embedded targets, • Experience designing, implementing, testing, or deploying real-time embedded software solutions., • Willingness to learn new techniques and apply critical thinking and problem-solving skills to diagnose customer issues., • Knowledge of modern computer architectures and hardware technologies including:, • x86, ARM Architectures, • Field Programmable Gate Arrays (FPGAs), • Working knowledge of the Linux Kernel development and device drivers for the Linux Kernel., • Experience with bare-metal software development., • Experience using version control systems such as Git or Subversion., • Strong knowledge of building up and maintaining a code base built with CMake and Google Test., • medical, • dental, • vision, • life insurance, • short-term disability, • long-term disability, • 401(k) match, • flexible spending accounts, • flexible work schedules, • employee assistance program, • Employee Scholar Program, • parental leave, • paid time off, • holidays, • Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance. This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply. RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window. RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. Location: US-CA-EL SEGUNDO-E01 ~ 2000 E El Segundo Blvd ~ BLDG E01 Salary range: 145,600 USD - 276,800 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate's work experience, location, education/training, and key skills. #J-18808-Ljbffr

Job Description Reactor Operations Engineer We are seeking a Reactor Operations Engineer to design and implement mission-critical procedures for reactor operators managing our groundbreaking nuclear microreactor technology. This role offers a rare opportunity to bridge engineering, operations, and human factors in a highly technical and regulated environment. You will collaborate with a multidisciplinary team to translate complex hardware and software designs into clear, executable, and DOE or NRC compliant procedures. Your work will ensure that Reactor Operators (ROs) and Senior Reactor Operators (SROs) can efficiently and safely execute test, commissioning, and operational activities. This position goes beyond traditional systems engineering—you will also gain hands-on experience as a Reactor Operator (RO), directly influencing the development of operational software, procedures, and digital twin simulations. Your contributions will enhance operator efficiency, safety, and real-world execution of our cutting-edge microreactors. Responsibilities and Duties: Develop and refine operational procedures that integrate both software and hardware-in-the-loop testing. Collaborate closely with engineers to improve operator interfaces, procedural workflows, and software tools. Qualify as an operator to gain firsthand experience, ensuring procedures align with real-world execution. Support testing and iterative improvements of digital twin scenarios, operator systems, and human-machine interfaces. Ensure compliance with DOE and NRC standards, maintaining strict formatting, clarity, and usability in procedural documentation. Required Skills and Qualifications: Undergraduate degree in engineering discipline. 2+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing. Proficiency in managing or optimizing complex hardware and software processes for testing and operations. Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations. Desired Skills and Qualifications: Prior experience working as an operator in nuclear environments (e.g., nuclear energy, naval reactors, or radiation-controlled facilities), with familiarity in safety protocols, regulatory compliance, and high-reliability operations Hands-on experience in developing technical procedures, human factors engineering, or operational interface design. Prior operations background such as mission control room operator. Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime). Proficiency in Python, UNIX, for procedure testing within the simulator environments. Experience with human factors and user-centered instructions for operational workflows. Additional Requirements: Must be willing to work extended hours and weekends as necessary to achieve company goals. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $119,000 - $146,475

Job DescriptionDescriptionVenturi Astrolab, Inc. (Astrolab) is pioneering new ways to explore and operate on distant planetary bodies. We are singularly focused on designing, building, and operating a fleet of multi-purpose commercial planetary rovers to extend and enhance humanity’s presence in the solar system. We are seeking motivated, creative, and exceptional people to join our world-class team. The Avionics team is responsible for all aspects of the electrical systems and hardware on Astrolab’s electric rover vehicles and ground support equipment. We work collaborative with all teams at Astrolab to provide exceptionally capable and reliable electronics to serve our missions. The Principal FPGA Engineer will participate in all aspects of the development and test of avionics FPGA RTL designs for Astrolab rovers. The ideal candidate has 15+ years of experience in FPGA firmware development including RTL design, simulations, analysis, verification, and HW testing. This position will report to the Director of Avionics Engineering and will be based in our Hawthorne, CA office. What you'll do: • Own FPGA RTL development from blank sheet to flight, • Develop FPGA logical architecture and requirements in collaboration with other engineering disciplines including defining HW/SW interfaces between fabric logic and processing subsystems, • Develop RTL code for Microsemi, Xilinx, or other FPGA or SoC devices in either SystemVerilog or VHDL, • Perform design verification including simulations, test benches, timing analysis, and hardware testing, • Lead design reviews, demonstrate requirement traceability, and create documentation for FPGA operation and interfacing with other SW and FPGA systems, • Develop and participate in test campaigns ranging from unit level manual tests, unit automated tests, and system level tests What You'll Bring • Bachelor of Science degree in Computer Engineering, Electrical Engineering, or equivalent, • 15+ years of experience in FPGA RTL architecture, development, verification, deployment, and maintenance, • Skilled at SystemVerilog or VHDL, • Skilled in at least 1 scripting language (TCL, shell, Python, etc), • Skilled in verification techniques, and timing/stability analysis, • Proficiency in understanding PCB designs and reading schematics, • Proficiency in understanding embedded software, • Proficiency with AXI protocols (at least AXI4 family), • Knowledge of common bus and memory interfaces (DDR4, SPI, I2C, UART, etc), • Demonstrated success working in a dynamic environmentAdditional Responsibilities, • Design for space environments including radiation impacts and mitigations What We Offer: • Join a team of best-in-class engineers building the foundation of planetary surface exploration, • Equity ownership in the company, • Comprehensive health benefits, including medical, dental, vision, and mental health support, • 401(k) plan with company match, • Flexible PTO and parental leave, • Home office set up reimbursement, • Fully flexible and remote friendly work environment, • Weekly lunch stipend, plus complimentary snacks and beverages on-site, • Once a month social hour on-site with food and drinks

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Loads & Dynamics Engineer to own and execute structural loads, vibration, and dynamic analyses for complex mechanical systems associated for Kaleidos, the world's first portable microreactor and supporting hardware. You will play a critical role in ensuring structural integrity and survivability across all phases of the product lifecycle, including manufacturing, transportation, handling, deployment, and operational environments. This role requires a hands-on engineer who is comfortable working in ambiguous, fast-paced environments and collaborating closely with structures, mechanical design, thermal, nuclear, and test teams. Responsibilities & Duties: Develop and own static, dynamic, and transient loads for reactor systems, support structures, and transport configurations. Perform structural dynamics analyses, including modal, random vibration, shock, sine vibration, and fatigue assessments. Implement explicit dynamics simulations to model nonlinear reactor response under transient seismic and transportation event cases. Define and analyze transportation and handling environments, including shock and vibration from road, rail, air, or sea transport. Generate load cases and environments to support structural sizing, design margins, and verification plans. Conduct finite element analyses (FEA) using tools such as ANSYS, Abaqus, or similar tools. Collaborate with design engineers to influence hardware architecture, material selection, and joint design. Support test planning and correlation, including shaker tests, modal surveys, and structural verification testing. Develop and maintain analysis documentation, reports, and requirements for internal reviews and regulatory interfaces. Contribute to failure investigations, root cause analyses, and design improvements Help establish best practices for loads, dynamics, and structural verification within a growing engineering organization. Required Qualifications & Skills: Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, Structural Engineering, or a related field. 3+ years of experience in loads, dynamics, or structural analysis for complex mechanical systems. Strong fundamentals in structural mechanics, dynamics, and vibration. Experience with finite element modeling and analysis of metallic and composite structures. Proficiency with industry-standard FEA tools (e.g., ANSYS, Abaqus, Nastran). Familiarity with design allowables, safety factors, and margin-of-safety methodologies. Ability to work cross-functionally and communicate analysis results clearly to both technical and non-technical stakeholders. Desired Qualifications & Skills: Experience in aerospace, launch, defense, nuclear, or heavy industrial hardware environments. Dynamics modeling software experience (LD-Dyna, Abaqus explicit, or other). Background in shock and vibration testing and test-article correlation. Knowledge of fatigue, fracture mechanics, and bolted joint analysis. Experience defining or interpreting environmental specifications and requirements. Master’s degree or PhD in a relevant engineering discipline. Familiarity with nuclear, spaceflight, or safety-critical system requirements. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $133.5K - $184.8K

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Hardware-in-the-Loop (HIL) Engineer to support the development and maintenance of Radiant’s NI PXI-based HIL system for Kaleidos. You will work closely with senior engineers to assist in hardware integration, testing, and validation of critical systems. This role is ideal for someone with foundational experience in HIL systems and a desire to grow their skills in real-time testing, automated validation, and electrical integration within a collaborative team environment. You will have the opportunity to contribute to the development of electrical integration systems that support the first successful fuel demonstration of a new commercial nuclear reactor design in over 50 years. Responsibilities and Duties: Assist in designing, building, and maintaining HIL test bench systems. Help configure test hardware, including power supplies, actuators, and sensor mapping. Support communication and integration with Digital Twin systems. Assist senior engineers with assembling and debugging HIL hardware and harnesses. Execute test procedures, collect data, and support analysis. Document test results, procedures, and lessons learned. Troubleshoot electrical and hardware issues with guidance from senior team members. Participate in design reviews and contribute ideas in a collaborative environment. Required Skills and Qualifications: BS in Electrical Engineering, Computer Engineering, or a related field. 2+ years of experience with HIL systems such as dSpace, NI PXI, Speedgoat, or similar platforms. Familiarity with NI HIL software (e.g., LabVIEW, TestStand) and programming/scripting in Python, C++, or C#. Hands-on experience with data acquisition, test execution, or electrical integration. Basic troubleshooting and debugging skills. Ability to work effectively in a team and communicate across disciplines. Desired Skills and Qualifications: Exposure to HW-SW integration and test procedures. Understanding of fundamental controls, software testing, and test processes. Interest in learning real-time simulation systems and FPGA-based systems. Familiarity with trace capture tools or data acquisition/analysis tools. Additional Requirements Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $124,500 - $172,725

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a highly motivated Mechanical Engineer, Fluids Systems to own critical Kaleidos fluid systems from preliminary design through build and production. These systems include the primary loop subsystems and power conversion loop, serving to convert heat from the reactor core into electrical power. You will be responsible for the following: trade studies, component selection, thermal hydraulic analysis, piping design, vendor selection, assembly, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026. Responsibilities & Duties: Own end-to-end engineering of fluid systems and components, including compressors, valves, and heat exchangers. Perform complex thermal and fluids analysis to drive design decisions, verify system performance, and ensure structural integrity using first-principle hand calculations and finite element tools. Perform trade studies to optimize system and meet program requirements. Develop and execute manufacturing/assembly instructions and test plans. Create and manage a Bill-Of-Materials (BOM). Find and develop suppliers for all components. Own subassembly design, manufacturing, and test schedules. Own risk analysis (FMEA) for subsystems. Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. Required Qualifications & Skills: Bachelor’s degree from an accredited institution in Mechanical, Materials, Aeronautical, Civil or Structural Engineering. Experience with fluid system architecture design. 2+ years of experience in designing, building, and testing fluids systems. Proficient knowledge in fluid dynamics and thermodynamics. Proficient knowledge of heat exchanger design and analysis methods. Desired Qualifications & Skills: Knowledge of thermodynamic power cycles. Prior experience with designing piping system for thermal growth using hand calculations and FEA tools. Experience with process piping design and testing codes, such as ASME B31.3 and ASME PCC-2. Prior experience with fluid system modeling via Matlab/Python. Experienced in design for manufacturability and ramping up hardware build in a production environment. Experienced in designing and operating test stands. Takes extreme ownership of work and a high degree of responsibility. Excellent communication across multidisciplinary teams. Prior nuclear experience in not required for this role. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $107.5K - $150K

Job DescriptionCX2 is a next-generation defense technology company founded to deliver spectrum dominance for the United States and our allies. CX2’s AI-enabled hardware and software platforms detect, disrupt and defend the electromagnetic spectrum across land, air, sea and space domains. CX2 is seeking a highly skilled Signal Processing Engineer to join our growing team. The ideal candidate has solid fundamentals in design, implementation and testing of signal processing techniques using MATLAB, Python and other existing frameworks. Experience in Defense is preferred. This role requires an onsite presence in our El Segundo, CA HQ; a remote work environment is not considered for this opportunity. Key Responsibilities • Digital Signal processing: Design, characterize, and deliver algorithms such as channelizers, frequency agile detection, adaptive filters, MIMO, wideband detectors, and other algorithms related to signal sorting, • Write and contribute to existing Python repositories using CUDA and/PyTorch, • Own requirements, ICDs, and verification from concept through delivery, • Stay current: Track and insert advances in signal processing techniques and associated technologies, adaptive beamforming, RF machine learning, and resilient PNT for GPS-denied ops. Required Qualifications, • Masters Degree in Electrical, Computer or Systems Engineering or related field with Graduate study emphasis in Signal Processing; OR a Bachelor’s Degree in an Engineering discipline with 3-5 years relevant working Signal Processing Experience, • Intermediate to advanced proficiency in Python, • Willingness to support critical test events that occasionally require extended hours/weekends., • Ability to obtain and maintain a security clearance. Learn more about Security Clearances here., • Must be a U.S. Person (see ITAR Regulations below) due to required access to U.S. export-controlled information or facilities Bonus Points, • PhD in Electrical Engineering, Computer Engineering, or related field, • 5+ years’ experience with EW subsystems and payloads., • EA/ECM technique design (deception, Digital RF Memory, coherent/non-coherent techniques)., • Comms system design (LPI/LPD, Waveform-of-Interest exploitation), • RF machine learning for emitter ID, modulation/classification, anomaly detection, PDW creation, • Tools Experience: ADS/AWR/SystemVue, MATLAB/Simulink, Python (NumPy/SciPy), GNU Radio/SDR (USRP/RFSoC), VITA-49; HDL/firmware experience also helpful (Vivado/Quartus/Libero)., • Clearance: Active Secret or ability to obtain and maintain; TS/SCI eligibility preferred. ITAR/EAR-controlled work., • Field work: supporting periodic travel for flight tests and customer demonstrations/support, • Mindset: Builder-tester who loves first-principles RF, rapid lab iteration, and getting hardware flying fast.ITAR Regulations, • To conform to U.S. Government export regulations, applicant must be a US Citizen, Green Card holder, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here. What We Offer, • Competitive salary, stock options and benefits, including health, vision and dental., • 401K enrollment at 90 days., • Generous PTO + most Federal Holidays observed., • Collaborative and inclusive work environment., • Access to the latest tools and technologies., • High levels of responsibility and autonomy., • Professional growth and development opportunities., • Access to the hardest problems in electronic warfare.Exact compensation may vary based on skills and experience.CX2 is a next-generation defense technology company securing spectrum dominance for the United States and its allies. We build AI-enabled hardware and software platforms to detect, disrupt, and defend the electromagnetic spectrum across land, air, sea, and space. Our systems are deployed in the most contested operational environments in the world. We’re backed by leading venture investors in the defense ecosystem and led by founders with track records at Meta, SpaceX, Epirus, and the U.S. Department of Defense. Equal Opportunity Employer CX2 is committed to equal employment opportunity. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender identity, sexual orientation, national origin, disability, veteran status, or any other protected characteristic under federal, state, or local law, including those with a criminal history, in compliance with the CA Fair Chance Initiative for Hiring Ordinance. To view CX2's privacy policy, please visit: https://www.cx2.com/privacy

Job Description Senior Hardware Design Engineer Broadata Communications, Inc. (BCI) – Torrance, CA On-site Company Overview Broadata Communications, Inc. (BCI) is a privately held California-based corporation. BCI is a leading and innovative company specializing in the development of market-driven products for the transmission of digital multimedia (video, audio, and data) over fiber. Our clients are world leaders in their industries, spanning entertainment, broadcast, medical, professional audio/video, house of worship, education, government, military, and transportation sectors. We are ISO 13485 and ISO 9001 certified, with a strong commitment to quality, innovation, and continuous improvement. Summary We are seeking a hands-on Senior Hardware Design Engineer to design, simulate, bring up, and validate complex mixed-signal and high-speed digital hardware for BCI multimedia, video-over-IP, fiber optic, medical, enterprise, and mission-critical products. This role focuses on schematic design, PCB layout, high-speed circuit simulation, signal integrity, power integrity, DFM/DFT review, board-level troubleshooting, and production release. Strong Altium Designer experience is required. Experience using Ansys HFSS for high-speed interconnect, via, connector, launch, transition, and channel simulation is a plus. This is a hands-on role based in Torrance, CA, and is not a remote or hybrid position. We offer a fast-paced, high impact and stimulating environment with opportunities for professional growth within BCI. Veterans welcome! Key Responsibilities • Own board-level hardware design from requirements review, architecture definition, component selection, schematic capture, PCB layout support, prototype bring-up, DFM/DFT review, verification, and production release., • Create and maintain complex multi-sheet schematics in Altium Designer for video, high-speed digital, embedded processor, FPGA/CPLD, power, analog, isolation, protection, and fiber optic interface circuits., • Own or directly support PCB layout in Altium Designer, including component placement, stack-up definition, controlled impedance, design rules, routing constraints, length matching, differential-pair tuning, return-path control, via strategy, and manufacturability review., • Define and review high-speed layout requirements for HDMI, DisplayPort, USB-C/USB 3.x, DVI, 3G/12G SDI, SFP/SFP+, 1G/10G Ethernet, PCIe, DDR2/DDR3/DDR4, LVDS, MIPI, and similar multi-Gbps interfaces., • Perform pre-layout and post-layout high-speed circuit simulation and SI/PI analysis to reduce jitter, crosstalk, insertion loss, return loss, reflections, via stubs, impedance discontinuities, EMI risk, and power noise., • Use Ansys HFSS or similar 3D EM tools when applicable to analyze connectors, high-speed launches, vias, back-drill structures, transitions, stubs, and other critical discontinuities. HFSS experience is a plus., • Use simulation and layout review to guide connector selection, cable interface design, ESD/EMI protection, common-mode choke usage, reference-plane continuity, grounding, shielding, and high-speed routing strategy., • Design and review power architecture, switching and linear power supplies, sequencing, protection circuits, thermal considerations, and power-distribution networks for reliable embedded products., • Lead board bring-up, debug, and root-cause failure analysis for prototypes, pilot builds, sustaining engineering changes, EOL redesigns, and customer RMA issues., • Use oscilloscopes, TDR/VNA, protocol analyzers, BERT/eye-diagram tools, logic analyzers, thermal tools, and standard lab equipment to validate high-speed, power, and embedded hardware performance., • Support verification and validation testing, including HDMI/DP/SDI/Ethernet interface checks, EMC/ESD testing, environmental stress screening, reliability testing, and compliance-related testing for medical or mission-critical products., • Prepare and review ECO/ECN packages, BOMs, manufacturing release packages, layout notes, simulation summaries, design review materials, test notes, and corrective-action documentation., • Work closely with product management, mechanical, firmware, FPGA, software, test, manufacturing, vendors, and ODM partners to deliver manufacturable and reliable products., • Lead and participate in schematic, layout, SI/PI, DFM, and design verification reviews, while mentoring junior engineers and PCB designers on high-speed layout and troubleshooting best practices.Job responsibilities within our organization are dynamic. This may not be a complete list of duties. Other responsibilities and duties may be assigned by your supervisor or upper management. Education & Experience • B.S. in Electrical Engineering or a related field. M.S. in Electrical Engineering is a plus., • 8+ years of hands-on hardware design experience with high-speed analog/digital, embedded, video, networking, or mission-critical electronic products., • Strong hands-on experience with Altium Designer for schematic capture and PCB layout is required. Candidates must be comfortable working with multi-sheet schematics, design rules, libraries, variants, BOMs, output jobs, and manufacturing release packages in Altium., • Demonstrated experience designing complex multi-layer PCBs with controlled impedance, differential pairs, high-speed connectors, high-density components, power distribution, grounding, shielding, EMI/ESD protection, and manufacturability constraints., • Practical experience with high-speed simulation, stack-up planning, signal integrity, power integrity, and root-cause analysis for multi-Gbps interfaces., • Working knowledge of digital video and data interfaces, especially HDMI, DisplayPort, USB-C/USB 3.x, SMPTE SDI, DVI, Ethernet, 10G Ethernet, SFP/SFP+, and related standards., • Experience interfacing with microcontrollers, application processors, FPGAs/CPLDs, video scalers, video receivers/transmitters, Ethernet PHYs/switches, high-speed memory, and common communication interfaces such as I2C, SPI, UART, RS-232, RS-485, USB, SDIO, Ethernet, and PCIe., • Strong hardware debugging skills with the ability to isolate failures to schematic, layout, component, firmware interaction, signal integrity, power integrity, EMI/ESD, or manufacturing causes., • Experience with analog and digital video products, video transmission over copper and fiber, AV-over-IP, SDVoE, video processing, capture, display, and interface conversion is preferred., • Hands-on Ansys HFSS experience for 3D EM extraction and analysis of high-speed channels, connectors, vias, launches, back-drill structures, stubs, and board transitions is preferred., • Experience with other SI/PI tools such as Ansys SIwave, Keysight ADS, HyperLynx, Sigrity, or similar tools is a plus., • Experience developing hardware for medical, military, industrial, or other high-reliability products and supporting standards such as IEC 60601, IEC 60601-1-2, ISO 13485, MIL-STD, or equivalent is a plus.Skills & Abilities, • Solid Electrical Engineering background with the ability to read, understand, create, edit, and review multimedia PCB schematics and high-speed layouts., • Strong understanding of FPGA/SoC/processors, memory systems, video interfaces, power subsystems including linear and switching topologies, ESD/EMI protection, and serial interfaces., • Strong team player who can work collaboratively with a diverse team to identify root cause of complex system problems, for both internally reported failures and customer RMAs, using structured methods such as Ishikawa/fishbone analysis., • Detail-oriented effective communicator with excellent customer-ready documentation and communication skills., • Ability to provide completion time estimates for a given set of design, simulation, bring-up, and validation requirements., • Ability to be hands-on with soldering, rework, assembly, board modification, and lab testing., • Ability to work with very little supervision, prioritize between multiple tasks, meet aggressive deadlines, and work extended hours as needed., • Highly responsible and committed to thrive in an energetic, fast-paced, evolving, high growth environment while coordinating cross-functional teams., • Strong self-motivation and attitude for personal career growth, willingness to self-learn, and ability to work in new technology domains.Physical Job Requirements The employee in the position will be required to occasionally move throughout the facilities, including climbing stairs, when necessary. Occasional bending and reaching in an office environment, including opening and closing file cabinets drawers with light grasping. Type on a standard keyboard (laptop or desktop). Use standard computer display screens. Use standard push-button phones and must speak clearly and be understood by others. Sit or stand in a standard upright position for a minimum of one hour, but up to 12 hours a day. Be able to lift and carry weight unassisted not exceeding 50 lbs. Compensation and Benefits • Salary Range: $130,000 - $180,000 (based on experience and qualifications), • Medical, vision and dental insurance, • 401(k) with company match (100% of the first 4% in eligible compensation), • Flexible Spending Account, • 2 weeks paid vacation, • 1 Week sick pay, • 10 company holidays, • Group life insurance Powered by JazzHR 7SXk6B5ASS

Systems Planning and Analysis, Inc. (SPA) delivers high-impact, technical solutions to complex national security issues. With over 50 years of business expertise and consistent growth, we are known for continuous innovation for our government customers, in both the US and abroad. Our exceptionally talented team is highly collaborative in spirit and practice, producing Results that Matter. Come work with the best! We offer opportunity, unique challenges, and clear-sighted commitment to the mission. SPA: Objective. Responsive. Trusted. The Space and Intelligence Division provides professional services to the US Space Force, Combatant Commands, Intelligence Community, and NASA. Our work includes enterprise architectural assessments, systems engineering and integration, test, planning and execution, cost estimating and analysis, acquisition support, and cybersecurity. We are trusted partners developing approaches and concepts to meet emerging high priority needs, assessing cutting‑edge technologies, and supporting capabilities for our National Defense. Come join the fastest growing Division at Systems Planning and Analysis, Inc.! The Space Systems Group (SSG), part of SPA's Space and Intelligence Division, provides timely and objective assessments and recommendations integrating technical, operational, programmatic, policy and business analysis. We focus on our key clients in the Space community including the US Space Force's Space Systems Command (USSF/SSC), one of the three designated Field Commands under USSF. We work tirelessly to provide integrated solutions based on information and communications throughout the chain of command. We provide clear and consistent analysis and recommendations which are aligned to strategic and leadership goals while balancing the ability to execute on time and on budget within the technical communities. Come join an organization responsible for being a key enabler of Spacepower! SPA has a near‑term need for a Principal Solutions Architect - AI Systems. SPA is seeking a Principal Solutions Architect - AI Systems to lead the architecture of an AI‑enabled decision‑support system integrated into an existing operational environment. This role owns how AI reasoning, deterministic logic, data, and human decision authority work together in a production system where trust, auditability, and mission impact matter. This is not a data science or model‑development role. It is a systems architecture role that requires deep AI systems literacy. Key responsibilities include but are not limited to the following: • Own end‑to‑end architecture for an AI‑augmented operational system., • Define how AI inference is bounded by constraints, validated, and surfaced for human decision‑making., • Design agent‑based and workflow‑driven architectures that combine probabilistic and deterministic reasoning., • Lead integration into existing platforms using API‑first, zero‑trust, container‑native patterns., • Establish architectural patterns for traceability, auditability, and responsible AI., • Serve as the senior technical authority across delivery increments. This is a remote/hybrid position. You will be expected to work on‑site at least 2 days per week in either Colorado Springs, CO or El Segundo, CA due to the fast pace, quick‑turn nature of the job and the persistent need to access secure networks. Thus, residing in comfortable driving distance of either Colorado Springs, CO or El Segundo, CA should be considered. About the Must Haves • US Citizen and current active DoD Secret clearance, • Minimum 8 years of experience designing complex distributed systems, • Bachelor's degree in Computer Science, Engineering, or related field, • Possession of at least one of the following certifications:, • Azure Solutions Architect Expert (AZ-305), • Azure DevOps Engineer Expert (AZ-400), • Certified Kubernetes Administrator (CKA) or equivalent, • Demonstrated experience architecting production AI‑enabled systems, • Experience integrating AI into existing enterprise or mission platforms, • Strong understanding of AI failure modes, uncertainty, and validation at the system level, • Experience designing systems with human‑in‑the‑loop authority, • Deep proficiency with the following tools & technologies:, • Distributed systems, APIs, containers (Docker/Kubernetes), • Cloud platforms (AWS/Azure/GCP), • AI integration patterns (model APIs, orchestration layers, tool‑calling), • Observability and system monitoring At SPA, we strive to deliver a robust total compensation package that will attract and retain top talent. Elements of the compensation package include competitive base pay and variable compensation opportunities. SPA provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work. The specific programs and options available to any given employee may vary depending on eligibility factors such as geographic location, date of hire, etc. Please note that the salary information shown below is a general guideline only. Salaries are commensurate with experience and qualifications, as well as market and business considerations. Pay Transparency Range: 175k - 255k. #J-18808-Ljbffr

Job DescriptionDescriptionVenturi Astrolab, Inc. (Astrolab) is pioneering new ways to explore and operate on distant planetary bodies. We are focused on designing, building, and operating a fleet of multi-purpose commercial planetary rovers to extend and enhance humanity’s presence in the solar system. We are seeking motivated, creative, and exceptional people to join our team. The Avionics team is responsible for the electrical systems and hardware of Astrolab’s electric rover vehicles and ground support equipment. We work collaboratively across teams to deliver exceptionally capable, reliable electronics that support our missions. The Principal Mixed Signal Electrical Engineer will lead the development and testing of avionics hardware for Astrolab rovers. The ideal candidate has 15+ years of experience in mixed signal electrical hardware design, including schematic capture, PCB layout, analysis, and test in high-reliability environments. This position reports to the Director of Avionics Engineering and is based in our Hawthorne, CA office. What you'll do: • Support avionics system architecture and requirements development, analysis, and trade studies, • Own mixed signal PCBA development from a clean sheet through qualification and flight, • Develop PCBA requirements, architectures, and con-ops in collaboration with cross-functional engineering teams, • Perform schematic capture and PCB layout of complex power, digital, and analog circuit PCBAs using Altium Designer, • Perform circuit analysis, including power integrity, signal integrity, SWaP optimization, tolerance analysis, and reliability assessments, • Lead PCBA design verification testing, qualification testing, and system integration testing, • Lead design reviews for interdisciplinary audiences, clearly communicating tradeoffs and design intent, • Support manufacturing, integration, and flight operations as needed What’s Prepared You : • Bachelor of Science degree in Electrical Engineering, Computer Engineering, or equivalent, • 15+ years of experience in power, digital, and analog electronics design, including schematic capture, PCB layout, analysis, and testing, • Design proficiency with voltage regulators, FPGAs, SoCs, high-speed data interfaces, precision analog instrumentation, and clocking architectures, • Skilled at schematic capture and layout of complex PCBs, • Skilled at performing circuit simulations and analysis in SPICE, Excel, and other tools for analog behavior, signal integrity, size and mass, and power optimization, • Proficiency with basic electronic lab equipment such as power supplies, oscilloscopes, DMMs, signal generators, and soldering tools, • Demonstrated success operating with ownership in a dynamic environment Additional Responsibilities, • Design for space environments, including radiation impacts, mitigation strategies, and long-duration reliability considerations. What We Offer: • Join a team of best-in-class engineers building the foundation of planetary surface exploration, • Equity ownership in the company, • Comprehensive health benefits, including medical, dental, vision, and mental health support, • 401(k) plan with company match, • Flexible PTO and parental leave, • Home office set-up reimbursement, • Fully flexible and remote-friendly work environment, • Weekly lunch stipend, plus complimentary snacks and beverages on-site, • Once a month, social hour on-site with food and drinks

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Reactor Operations Enablement Engineer to play a critical role in enabling safe, scalable operations for the line of Kaleidos reactors. In this role, you will be responsible for building Reactor Operator training resources to enable timely and effective training and certification of operators. This role goes beyond traditional documentation, requiring close, daily collaboration with operators, engineers, and test teams to rapidly translate emerging system knowledge into clear, actionable content. This role may also support engineering operations through the development of test plans, data reviews, and other key technical documentation needed to move from prototype to commercial deployment. Responsibilities & Duties: Develop and continuously refine Reactor Operator training materials, including operator manuals, learning objectives, lesson plans, operating procedures, and evaluation tools. Direct experience with nuclear systems, reactor operations, or operator training programs. Maintain records of operator qualification to DOE/NRC standards. Translate evolving reactor designs and operational concepts into clear, concise, and easily understood training content. Embed with engineering, test, and operations teams to capture real-time technical insights and lessons learned and reflect them in documentation. Establish and maintain documentation standards, templates, and style guides suited for a fast-paced startup environment. Manage document lifecycles within configuration-controlled systems, including version control, change tracking, and rapid updates. Balance speed and rigor to ensure documentation supports both rapid development and regulatory expectations. Capture operational lessons learned and support development of regulatory documents, to include white papers and topical reports. Required Qualifications & Skills: Bachelor’s degree in Engineering, Physics, Technical Communication, or a related technical discipline. 2+ years of technical writing experience in a complex, engineering-driven environment (e.g., nuclear, aerospace, energy, or advanced hardware). Familiarity with complex systems and the ability to distill them into operator-focused training content through both written and verbal mediums. Ability to deliver instructional material in both group and one-on-one classroom environments. Ability to read and interpret engineering drawings, specifications and procedures. Ability to work with incomplete or evolving technical information and produce clear, accurate documentation. Experience developing training materials, technical references, or test documentation. Strong collaboration skills and comfort working directly with engineers and operators in a dynamic setting. Familiarity with document control and configuration management principles. Desired Qualifications & Skills: Background in instructional design or building technical training programs Familiarity with NRC or DOE regulatory instructions and licensing considerations for commercial reactors. Ability to operate with a high degree of ownership and autonomy in an evolving organizational structure. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $150K - $207.9K

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a talented Electric Motor Design Engineer to design and develop an alternator for the nuclear-driven, high-speed power generator. Responsibilities include but are not limited to the design and analysis of active parts within the high-speed generator. You will collaborate with engineers cross-functionally and partner closely with the turbomachinery team developing a system for converting mechanical energy to electrical to be delivered to customers safely and reliably. The successful candidate will own active part design of generators, along with performing analysis, simulation, and component selection. You'll make a big impact in commercializing Earth's first mass-produced nuclear reactors and power remote areas and critical infrastructure with abundant clean energy. Responsibilities & Duties: Create 3D models and 2D fabrication drawings in CAD and NX. Communications with vendors to source all components to build the generator. Perform bench testing, dynamic testing, and system testing for all subsystem components and models. Perform hands-on assembly, rapid prototyping, and integration of high voltage electric motors and generators. Required Qualifications & Skills: B.S. in mechanical engineering specializing in electric motors. Fundamental knowledge of permanent magnet electric motors. Experience in design, manufacturing, and assembly of electric motors. Desired Qualifications & Skills: M.S in Mechanical Engineering specializing in electric motors. Knowledge of motor control systems including SVM. Great team player with one team mentality working with turbomachinery, power electronics, thermal, packaging and software teams. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $95K - $105K

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a highly motivated Staff Mechanical Engineer to own critical Kaleidos fluid systems from preliminary design through build and production. These systems include the primary loop subsystems and power conversion loop, serving to convert heat from the reactor core into electrical power. You will be responsible for the following: trade studies, component selection, thermal hydraulic analysis, piping design, vendor selection, assembly, and testing. You will have an instrumental impact of fueling the first new commercial reactor design in over 50 years by 2026. Responsibilities & Duties: Own end-to-end engineering of fluid systems and components, including compressors, valves, and heat exchangers. Perform complex thermal and fluids analysis to drive design decisions, verify system performance, and ensure structural integrity using first-principle hand calculations and finite element tools. Perform trade studies to optimize system and meet program requirements. Develop and execute manufacturing/assembly instructions and test plans. Create and manage a Bill-Of-Materials (BOM). Find and develop suppliers for all components. Own subassembly design, manufacturing, and test schedules. Own risk analysis (FMEA) for subsystems. Collect requirements, provide expertise and feedback to engineers in other functional areas via clear, constructive communication. Required Qualifications & Skills : Bachelor’s degree from an accredited institution in Mechanical, Materials, Aeronautical, Civil or Structural Engineering. Experience with fluid system architecture design. 7+ years of experience in designing, building, and testing fluids systems. Proficient knowledge in fluid dynamics and thermodynamics. Proficient knowledge of heat exchanger design and analysis methods. Desired Qualifications & Skills : Knowledge of thermodynamic power cycles. Prior experience with designing piping system for thermal growth using hand calculations and FEA tools. Experience with process piping design and testing codes, such as ASME B31.3 and ASME PCC-2. Prior experience with fluid system modeling via Matlab/Python. Experienced in design for manufacturability and ramping up hardware build in a production environment. Experienced in designing and operating test stands. Takes extreme ownership of work and a high degree of responsibility. Excellent communication across multidisciplinary teams. Prior nuclear experience in not required for this role. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $200,500 - $314,475

Job Description Waypoint Sierra Consultants is seeking a senior Space System RF Engineer to provide technical leadership and lifecycle oversight for advanced spaceborne RF payloads—from requirements definition and concept selection through integration, test, launch, and on-orbit deployment. This full-time, on-site role supports classified national security space missions in El Segundo, California. WHAT YOU’LL DO • Provide technical leadership for the full lifecycle of advanced space RF payloads., • Advise government stakeholders on architecture and design tradeoffs, technology readiness, and risk-mitigation strategies., • Lead requirements development, evaluation, traceability, and disciplined flow-down to subsystem and component levels., • Conduct concept design assessments and analyses of alternatives to identify effective, mission-aligned solutions., • Evaluate critical technology elements and integration readiness to support mission success., • Partner with contractors, engineers, mission planners, and government leaders to align technical execution with strategic objectives., • Develop decisive, data-driven recommendations and present them clearly to senior stakeholders., • Support multidisciplinary reviews across digital signal processing, RF systems, radar, remote sensing, mission analysis, and systems engineering. REQUIRED QUALIFICATIONS • Extensive experience developing spaceborne RF payloads from concept through operational deployment., • Deep technical expertise in digital signal processing and RF systems, including radar., • Experience with remote sensing, mission analysis, and systems engineering., • Proven ability to lead requirements development, design trades, technical reviews, risk assessments, integration, and verification activities., • Strong analytical, problem-solving, and communication skills., • Active TS/SCI security clearance with the ability to obtain a CI polygraph., • Ability to work full-time on site in El Segundo, CA. COMPENSATION AND BENEFITS • Annual salary range: $200,000–$235,000., • Comprehensive benefits package. START DATE Immediate ABOUT WAYPOINT SIERRA Waypoint Sierra Consultants provides professional aerospace services for demanding defense and intelligence missions. Our team supports advanced space systems across the mission lifecycle—from acquisition and integration through launch and on-orbit operations. Company DescriptionWaypoint Sierra Consultants provides professional aerospace services for the most demanding missions, supporting the acquisition, integration, and operation of the world’s most advanced space systems for defense and intelligence applications. We provide system engineering and integration support to numerous USSF space missions. Our team assists in all mission phases, from pre-acquisition through launch-site integration and on-orbit operations.Waypoint Sierra Consultants provides professional aerospace services for the most demanding missions, supporting the acquisition, integration, and operation of the world’s most advanced space systems for defense and intelligence applications. We provide system engineering and integration support to numerous USSF space missions. Our team assists in all mission phases, from pre-acquisition through launch-site integration and on-orbit operations.

Job Description Sixense, Inc. is seeking an Instrumentation and Monitoring Engineer out of Torrance, CA to support the deployment and maintenance of structural and geotechnical instrumentation systems. In this hands-on role, you will work closely with the local team to prepare, install, and service a wide range of monitoring equipment in diverse environments. RESPONSIBILITIES Summary Under the supervision of the Project Manager, the candidate will perform field and office-based tasks aligned with company policies, standards, and best practices. You’ll also contribute to project success by providing quality control support, observations, and technical recommendations to the project team. Main role • Install and maintain the performance of various geotechnical and structural monitoring instruments following Sixense procedures, including but not limited to datalogging systems and Automatic Motorized Total Stations., • Assembling instrumentation and Automatic Data Acquisition Systems (ADAS)., • Operation of power tools and hand tools (hammer drill, Sawzall, wrenches, etc.), • Performing the configuration of the Data Management System., • Coordinating and communicating with clients, subcontractors, and others., • Provide timely assistance to engineers and fellow technicians as needed., • Perform routine maintenance and installations, which may involve working at height, on rail systems, or during night shifts. Health & Safety • Actively participate in Sixense’s Health and Safety Program and help foster a positive safety culture., • Ensure full understanding of all relevant safety protocols before starting any task. Other General Responsibilities • Communicate equipment needs, performance issues, or field findings to the Supervisor or Project Manager., • Occasionally climbing up to ladders and lifting up to 50 lbs. to install or decommission instrumentation., • Perform additional duties in the workshop or field as needed., • Seek continuous improvement in operational procedures and workflows. QUALIFICATIONS AND EXPERIENCE REQUIRED Education & Experience • BS Degree in Civil Engineering or related discipline., • Minimum of 3 years of relevant field experience., • Demonstrable experience with the installation and maintenance of geotechnical and structural instruments such as piezometers, inclinometers, extensometers, and total stations., • Basic understanding of heavy construction means and methods., • Strong collaboration abilities, working effectively with colleagues and within multidisciplinary teams., • Strong attention to detail and effective oral and written communication skills., • Must be technology-minded, have basic knowledge about instrumentation systems, basic programming, software, low-voltage electrical, and remote measurements., • Valid driver’s license with a clean driving record., • Proficiency in MS Office Suite (Word, Excel, SharePoint, PowerPoint) and Adobe Acrobat Soft Skill Requirements • Strong work ethic and professionalism in representing the company., • Self-motivated with the ability to work independently and collaboratively with minimal supervision., • Must be willing to work outdoors in all weather conditions., • Able to manage multiple priorities in a fast-paced environment. ADDITIONAL INFORMATION • Travel may be required both locally and nationally., • Must be legally authorized to work in the United States without sponsorship. Physical Requirements: • Lift, carry, pull and push at least 40 pounds, • Travel per the company travel policy, often overnight and away from home Mental Requirements: • Converse effectively using both verbal and written communication., • Make decisions and assume accountability, • Concentrate on tasks, • Demonstrate ability to manage stress and emotions as related to the workplace, • Attention to detail, • Identify and resolve conflict, • Assess safety and risk Benefits: • Medical, • Dental, • Vision, • Short Term Disability, • Long Term Disability, • Accidental Death and Dismemberment, • Life Insurance, • Maternal and Paternal Leave, • 401(k)matching, • Safe Harbor Retirement Plan, • Employee Assistance Program, • Paid Vacation, • Sick Days Sixense Inc. participates in E-Verify. Please be advised that all interested candidates are REQUIRED to attach a copy of your resume in order to be considered. In an effort to foster a diverse workforce Nicholson Construction encourages applications from minorities, veterans, women and individuals with disabilities. EOE AA M/F/Vet/Disability If you want to view the EEO is the Law poster, please choose your language: English – Spanish – Arabic - Chinese

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. We are seeking a Test Engineer to drive mission-critical test operations for the development, qualification, and acceptance our groundbreaking nuclear microreactor technology. This role offers a rare opportunity to bridge engineering, operations, and human factors in a highly technical and fast-paced environment. You will collaborate with a multidisciplinary team to translate complex hardware and software designs into clear, executable test operations, with encompassing test procedures that will efficiently and safely execute test, commissioning, and operational activities. As part of a small, passionate, and accomplished team of test engineers, you will help drive test operations to meet Radiant’s requirements in a fast-paced production environment. You will directly contribute to test operations by assisting with test planning and execution, risk identification and mitigation, hardware integration for test campaigns, post-test inspections, data review, and hardware performance analysis. This position goes beyond traditional systems engineering - you will also gain hands-on experience as a test conductor and test director, directly influencing the development of operational software, procedures, and test ground support equipment. Responsibilities & Duties: Perform testing as a Test Conductor/Test Director to gain firsthand experience, ensuring procedures align with real-world execution. Collaborate closely with engineers to improve test system interfaces, procedural workflows, and software tools. Support testing and iterative improvements of fluid, electrical, and structural hardware of the Kaleidos reactor through development, qualification, and acceptance testing. Support one-off test campaigns in a fast paced, minimum-requirements environment to drive hardware risk reduction. Ensure compliance with DOE and NRC standards, maintaining strict formatting, clarity, and usability in procedural documentation. Required Qualifications & Skills: 2+ years of full-time professional experience in engineering problem-solving, including system design, analysis, or testing. Bachelor’s degree from an accredited institution in mechanical, manufacturing, or other related engineering discipline. Ability to apply first principles thinking to solve problems and make decisions in uncertain or ambiguous situations. Background in highly regulated industries (e.g., nuclear, aerospace, aviation, maritime). Demonstrated ability to lead projects and work independently. Strong technical fundamentals in fluids and thermodynamics. Strong written and verbal communication skills. Flexible and adaptable mindset - self-driven with the ability to seek out requirements with minimal direction. Desired Qualifications & Skills: Prior experience working as an operator in fast-paced test environments (e.g., rocket engine testing, turbopump testing, component level testing), with familiarity in safety protocols, and high-reliability operations, high pressure gases, safety engineering (FMECAs, Keep-out Zone). Experience designing, fabricating, or operating fluid systems. Knowledge of instrumentation including pressure transducers, thermocouples, resistance temperature detectors, and accelerometers. Ability to read and interpret engineering standards, technical requirements, and engineering drawings (ASME 31.3, 31.1, and ASME Boiler Code Section III/VIII). Hands-on experience in developing technical procedures. Experience reviewing test data and hardware performance analysis. Prior operations experience with hands-on work designing and commissioning test ground support equipment (test fixtures, fluid systems, electrical systems). Proficiency with Ion, Epsilon3, NX CAD, Teamcenter. Experience with Beckhoff PLC Controllers. Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Willingness to travel 50% - 60% of the time as needed for projects. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $106,500 - $146,475

Job Description Senior Mechanical Engineer – Turbomachinery Rotordynamics Radiant is seeking a highly motivated engineer to join the team responsible for the power generation and primary cooling turbomachinery of our Kaleidos product. This role involves performing the rotordynamic analysis and bearing selection of high-speed rotating machinery including compressors, turbines, and pumps for high-temperature applications. The ideal candidate will have a strong background in rotordynamics and bearing selection, along with hands-on experience testing real hardware. Responsibilities and Duties: Design, build, and test turbomachinery for Radiant’s power generation systems. Perform dynamic analysis of rotor-bearing systems to evaluate vibrational behavior, stability, and resonance characteristics. Conduct critical speed analysis, Campbell diagram analysis, and stability assessments to optimize rotor system design for minimal vibration and resonance. Analyze rotor response under transient operating conditions, including startup, shutdown, and off-design operations. Select appropriate bearing types (e.g., rolling element, fluid film, magnetic) based on operating conditions and performance requirements. Evaluate bearing loads, life, and thermal performance. Prepare technical reports, design documentation, and presentation materials. Support the build and testing of prototype, first article, and production hardware. Required Qualifications and Skills: Bachelor’s or Master’s degree in Mechanical Engineering or a related field. 5+ years of experience in the design and analysis of turbomachinery, rotating equipment, or mechanisms. Strong understanding of rotordynamic principles and tools (e.g., XLrotor, Dyrobes, or equivalent). Excellent problem-solving, technical communication, and organizational skills. Desired Qualifications and Skills: Prior experience with power generation applications. Knowledge of bearing selection for high-temperature, high-speed applications. Hands-on experience with turbomachinery testing and instrumentation. Familiarity with relevant industry standards (API, ASME, ISO). Prior nuclear experience is not required for this role. Additional Requirements Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $158,000 - $247,275

Job DescriptionDescriptionVenturi Astrolab, Inc. (Astrolab) is pioneering new ways to explore and operate on distant planetary bodies. We are singularly focused on designing, building, and operating a fleet of multi-purpose commercial planetary rovers to extend and enhance humanity’s presence in the solar system. We are seeking motivated, creative, and exceptional people to join our world-class team. As an EMC Engineer, you will be responsible for ensuring Avionics components are designed to endure the harsh electromagnetic environmental effects of interplanetary space. You will play a pivotal role in defining the design criteria for state-of-the-art avionics and electro-mechanical systems for the lunar surface with a strong focus on electromagnetic compatibility, in-space charging effects, and interdisciplinary requirements. You will be joining a company at the ground-level and have immense influence over the future of lunar exploration. What you'll do: • Collaborate closely within cross-functional Engineering teams to capture requirements, lead design trades with respect to EMI/EMC, and integrate the design into the rover systems., • Contribute to full avionics and electro-mechanical systems/subsystems from system to component level with specific focus on E3 design criteria and operational/survivability requirements., • Analyze and contribute to designs relating to the effects of circuit and power system grounding architectures, structural electrical bonding, circuit isolation, shielding effectiveness, radiated/conducted emissions and susceptibility, near field/far field electromagnetics, transient protection, signal and power integrity, and general RF compatibility., • Troubleshoot EMI issues from board to system level., • Operate and automate a variety of EMI, RF, and electronics test equipment (spectrum analyzers, network analyzers, signal generation, oscilloscopes) within the context of avionics development and in house EMC testing., • Create and update technical documentation including command media, system diagrams, schematics, interface control documents, procedures, work and/or build orders, vendor and payload requirements, and test/anomaly reports., • Support flight hardware component qualification and spacecraft integration testing, including production issue dispositions, troubleshooting failures, and managing overall spacecraft risk. What you'll bring: • Bachelor’s degree in electrical engineering, physics, or other engineering discipline., • 5+ years of experience in EMI/EMC requirements, analysis, design, and testing for spacecraft systems and/or avionics component design (academic and personal projects apply)., • Proficient in the use of lab equipment such as oscilloscopes, multimeters, signal generators, logic analyzers, etc., • Proficient with Analytics/Modeling/Simulation tools such as LTSpice, and experience with electrical circuit analysis using simulation tools such as Spice or equivalent., • Familiarity with SMC-S-016 testing requirements, and testing per SMC-S-016., • Knowledge of electrical safety and EMC commercial compliance standards and/or testing., • MIL-STD-461 experience across the full range of EMC test (radiated susceptibility, radiated emissions, conducted susceptibility, conducted emissions) standards., • Experience in high power avionics system designs for spacecraft including: LDO Regulators, Buck/Boost converters, power line filters and various spacecraft grounding schemes for high voltage systems., • Experience in motor controller system designs for brushless DC motors (BLDC) and permanent magnet synchronous motors (PMSM) in both low and high voltage systems., • Ability to read, interpret and follow circuit schematics, PCB layouts, engineering drawings, BOMs, cable harnesses, wiring schematics, interface diagrams, layout drawings, mechanical drawings, and CAD software., • Creative problem solver that can assess risk and make collaborative design and development decisions., • Strong presentation experience in highly technical design forums and reviews (Preliminary Design Reviews, Critical Design Reviews, Flight Readiness Reviews, etc.)., • Experience with NX or similar CAD software including electrical harness routing., • Experience with vehicle level testing including writing test procedures, creating robust and efficient test sequencing, and analytical data review to evaluate hardware health. What We Offer: • Join a team of best-in-class engineers building the foundation of planetary surface exploration, • Equity ownership in the company, • Comprehensive health benefits, including medical, dental, vision, and mental health support, • 401(k) plan with company match, • Flexible PTO and parental leave, • Home office set up reimbursement, • Fully flexible and remote friendly work environment, • Weekly lunch stipend, plus complimentary snacks and beverages on-site, • Once a month social hour on-site with food and drinks

Job DescriptionDescriptionVenturi Astrolab, Inc. (Astrolab) is pioneering new ways to explore and operate on distant planetary bodies. We are singularly focused on designing, building, and operating a fleet of multi-purpose commercial planetary rovers to extend and enhance humanity’s presence in the solar system. We are seeking motivated, creative, and exceptional people to join our world-class team. As a Human Factors Engineer supporting the NASA Lunar Terrain Vehicle Services (LTVS) within the Extravehicular Activity and Human Surface Mobility Program (EHP), you will champion the human-centered design of Astrolab’s FLEX-LTV, which will be used by Artemis Crew to traverse and explore the lunar environment. You will work closely with cross-disciplinary teams including Systems Engineering & Integration (SEI), Subsystem Responsible Engineers (REs), Crew Accommodations, User Interface (UI) Designers, Simulation & Training, and Operators/Astronauts to ensure that human safety, performance, and usability are engrained in the LTV design. You will report to the Astrolab Human Systems Integration (HSI) Lead under the Program Management Office (PMO). Employment in this role is contingent on Astrolab being selected as a winner of NASA’s LTVS program. What you'll do: • Carry out the HSI Plan across the development lifecycle in support of a safe & efficient user experience (UX) for our astronauts, • Work with our partners at Axiom Space to align the LTV design to suited crew capabilities & limitations while prioritizing safety, operational effectiveness, and crew time efficiency, • Collaborate with engineers & designers to optimize for suited crew use of LTV displays, controls, and mechanical interfaces, • Coordinate cross-disciplinary input & testing of LTV Crew Task Lighting to ensure the necessary visual access of all visual targets according to crew procedures and mission objectives, • Utilize Figma and other rapid prototyping tools to produce interactive graphical user interface (GUI) wireframes and mockups in alignment with Artemis GUI standards and commonality, • Conduct human factors engineering analyses and evaluations (e.g., Task Analysis (TA), Human Error Analysis (HEA), Human-in-the-Loop (HITL) Testing, Crew Operational Loads, Risk Assessments, etc.) and process findings for design and/or operational impacts, • Support simulation & training events with astronauts and representative participants using Astrolab test artifacts located at Odyssey Space Research and the Texas A&M Space Institute, • Manage, adjudicate, and track the flow of human factors design feedback/concerns from ticket creation through design unit implementation in compliance with human systems requirements, • Assist SEI efforts in executing the Verification, Validation, & Certification Plan as it pertains to the closure of human systems requirements and total-system human-rating, • Inform and attend cadenced discussions with NASA to share LTV development progress and review key decisions/changes, • Update and maintain technical documentation, including contractual HSI deliverables to NASA What you'll bring: • Bachelor’s degree in Human Factors, Human-Computer Interaction, Human-Centered Design, Ergonomics, or another relevant field (e.g., Biomechanics, Psychology, Industrial Design), • 0-5 years of experience in human factors engineering, human systems integration, and/or UI/UX development including user testing, preferably in human spaceflight or a related industry, • Familiarity with NASA-STD-3001, MIL-STD-1472, and/or the FAA HF-STD-001, • Understanding of project management and systems engineering processes, tools, and methodologies, • Strong problem-solving skills with keen attention to detail, • Excellent verbal communication, written communication, and negotiation skills, • Ability to empathize with user needs and elicit valuable user/stakeholder feedback, • Ability to work effectively in a cross-disciplinary team, • Ability to organize and balance multiple competing priorities in a fast-paced work environmentNice to Haves, • Graduate degree in Human Factors, Human-Computer Interaction, Human-Centered Design, Ergonomics, or another relevant field (e.g., Biomechanics, Psychology, Industrial Design), • Experience in space architecture, bioastronautics, aerospace physiology, optical engineering, vehicle cabin/interior development, and/or extreme environment analogs, • Knowledge of space extravehicular activity (EVA) systems (e.g., pressurized suits, EVA tools), • Understanding of design thinking and/or rapid spiral development methodologies Benefits and Perks • Join a team of best-in-class engineers building the foundation of planetary surface exploration, • Equity ownership in the company, • Comprehensive health benefits, including medical, dental, vision, and mental health support, • 401(k) plan with company match, • Flexible PTO and parental leave, • Home office set up reimbursement, • Fully flexible and remote friendly work environment, • Weekly lunch stipend, plus complimentary snacks and beverages on-site, • Once a month social hour on-site with food and drinks

Job DescriptionAbout Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028. About the Role Radiant is seeking a Principal Electrical Engineer to lead the electrical system architecture and test infrastructure for Kaleidos, Radiant's commercial microreactor unit targeted for deployment in 2028. You will own end-to-end electrical integration, from early architecture and requirements definition through hardware bring-up, testing, and commissioning, and serve as the technical authority, ensuring the electrical and validation systems are ready to support that milestone. The ideal candidate brings deep electrical engineering expertise, strong systems-level thinking, and a track record of leading complex hardware programs from concept to deployment. You are equally comfortable making architecture decisions independently and collaborating across mechanical, software, and systems engineering teams. Responsibilities & Duties Define and own electrical and software integration requirements spanning power distribution, signal conditioning, sensor mapping, actuator interfaces, and device simulation. Own and build out the electrical test infrastructure for Kaleidos, and establish the test environment as a foundational asset to validate the commercial unit ahead of the 2028 deployment target. Establish and maintain communication between hardware, control systems, and software interfaces. Define and drive electrical validation strategy; develop test procedures, methodologies, and best practices. Manage schedule, budget, and vendor management for electrical hardware and integration activities. Optimize test and validation processes; develop tooling and automation to improve efficiency. Support electrical integration across multiple critical systems and subsystems. Lead design reviews and effectively communicate technical decisions to cross-functional stakeholders. (Electrical integration, embedded, software, controls.) Required Qualifications BS in Electrical Engineering or related discipline from an accredited institution. 10+ years of progressive electrical engineering experience, including hands-on hardware design, integration, and test. Demonstrated experience setting technical direction, mentoring engineers, and driving programs with significant scope and ambiguity. Demonstrated ability to work under tight timelines and deliver a functional product that meets requirements. Experience with DAQ and test systems (e.g., NI PXI, dSpace, Speedgoat, or similar platforms). Proficiency with software and scripting environments (e.g., LabVIEW, TestStand) Proficiency with data acquisition systems, test execution, and validation frameworks. Strong electrical and software debugging and root cause analysis skills. Experience working cross-functionally with software, mechanical, and systems engineering teams. Proficiency in at least one scripting or programming language (Python, C++, C#, or similar). Desired Qualifications: MS or PhD in Electrical Engineering, or a related discipline. Familiarity with real-time simulation systems and/or FPGA-based hardware. Experience with controls fundamentals and software testing processes. Hands-on experience with trace capture, data acquisition, and analysis tools. Background in high-reliability, safety-critical, or regulated industry environments (aerospace, defense, nuclear, medical, or automotive) Additional Requirements: Must be willing to work extended hours and weekends as necessary to accomplish our mission. Must work 100% onsite at El Segundo HQ. Benefits and Perks Stock: Substantial incentive stock plan for all full-time employees. Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans. One Medical: Sponsored memberships for employees and their dependents. Vision: 100% top tier plan coverage + 50% for dependents. Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents. Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits. 8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees. Daily catered lunch. Free snacks and drinks. Flexible PTO policy. Remote workday allocation. Company and team-bonding events, happy hours and in-person camaraderie. Beautiful El Segundo headquarters close to the Pacific Ocean. Total Compensation and Benefits Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant. The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law. Unfortunately, we are unable to provide visa sponsorship at this time. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. Compensation Range: $200,500 - $314,475