205 Best senior software engineer Jobs in Denver, Colorado (March 2026)

Senior CyberSecurity Engineer I/II

9 days ago

Littleton

Job Description ABOUT ROCKET LAB Rocket Lab is an end-to-end space company delivering responsive launch services, complete spacecraft design and manufacturing, payloads, satellite components, and more – all with the goal of opening access space. The rockets and satellites we build, and launch enable some of the most ambitious and vital space missions globally, supporting scientific exploration, Earth observation and missions to combat climate change, national security, and exciting new technology demonstrations. Our Electron rocket has become the second most frequently launched U.S. rocket annually and has delivered more than 230 satellites to orbit, all while we work to develop Neutron, our upcoming medium-lift, reusable launch vehicle for larger constellation deployment. Our Space Systems business designs and builds our extensive line of satellites, payloads, and their components, including spacecraft that have been selected to support NASA missions to the Moon and Mars and components used on the James Webb Space Telescope. SPACE SYSTEMS At Rocket Lab, we're not just launching rockets — we're building the future of space. Our Space Systems team builds everything from complete spacecraft, precision payloads to the components and subsystems that allow them to thrive in space, like solar panels, flight software, star trackers, optical systems, separation systems, radios, and more. Our Space Systems team has enabled more than 1,700 missions, ranging from interplanetary exploration, in-space manufacturing to national security and defense initiatives. The team has built spacecraft, payloads, and components for missions to the Moon and Mars, working with partners including NASA, the Space Development Agency, and the U.S. Space Force. Whether it's a single high-performance spacecraft, constellation, or the vertically integrated components that help them get to space — our world class Space Systems team is empowering some of the boldest and most ambitious space missions. SENIOR CYBERSECURITY ENGINEER I/II Based out of Littleton, CO, the Senior Cybersecurity Engineer I/II will be responsible for designing, implementing, and maintaining the security infrastructure of SDA programs. This role requires a deep understanding of security principles, advanced technical skills, and the ability to stay ahead of emerging threats. The ideal candidate will have extensive experience in software security engineering, a proactive approach to problem-solving, and a passion for protecting sensitive information. WHAT YOU'LL GET TO DO: • Design, implement, and manage security solutions to protect the programs IT infrastructure, including networks, servers, and applications., • Conduct regular security assessments, vulnerability scans, and penetration tests to identify and mitigate security risks., • Develop and enforce security policies, procedures, and standards to ensure compliance with industry regulations and best practices., • Monitor security systems and respond to security incidents, providing detailed analysis and remediation., • Collaborate with IT and development teams to integrate security best practices into the software development lifecycle., • Stay current with the latest security trends, technologies, and threats, and recommend enhancements to improve the organization's security posture., • Mentor and provide guidance to junior security engineers and other IT staff. (Please note: This position can be hired at Senior Cybersecurity Engineer I or Senior Cybersecurity Engineer II level.) QUALIFICATIONS YOU'LL BRING AS SENIOR CYBERSECURITY ENGINEER I: • Bachelor's degree in Computer Science, Information Security, or a related field., • 5+ years of experience in system security engineering or a related role., • 8140 Intermediate or Advanced certification (e.g. Security+, Cloud+, CISSP, CISM, CEH, or equivalent), • Strong knowledge of security frameworks and standards (e.g., NIST 800, ISO 27001, CIS Controls)., • Proficiency in security tools and technologies (e.g., firewalls, IDS/IPS, SIEM, endpoint protection)., • Experience with cloud security (AWS, Azure, GCP) and securing hybrid environments., • U.S. citizenship is required, due to program requirements., • Active Secret Clearance is required upon hire. QUALIFICATIONS YOU'LL BRING AS SENIOR CYBERSECURITY ENGINEER II : • Bachelor's degree in Computer Science, Information Security, or a related field., • 8+ years of experience in system security engineering or a related role., • 8140 Intermediate or Advanced certification (e.g. Security+, Cloud+, CISSP, CISM, CEH, or equivalent), • Strong knowledge of security frameworks and standards (e.g., NIST 800, ISO 27001, CIS Controls)., • Proficiency in security tools and technologies (e.g., firewalls, IDS/IPS, SIEM, endpoint protection)., • Experience with cloud security (AWS, Azure, GCP) and securing hybrid environments., • U.S. citizenship is required, due to program requirements., • Active Secret Clearance is required upon hire. THESE QUALIFICATIONS WOULD BE NICE TO HAVE: • Master's degree In Computer Science, Information Security, or related field., • Excellent understanding of network protocols, operating systems, and application security., • Experience with DevSecOps practices and tools., • Experience with incident response and digital forensics., • Familiarity with scripting and automation (e.g., Python, PowerShell), • Strong analytical and problem-solving skills, with the ability to think critically and act decisively under pressure., • Excellent communication and interpersonal skills, with the ability to work effectively with cross-functional teams. ADDITIONAL REQUIREMENTS: • Specific vision abilities required by this job include close vision, distance vision, peripheral vision, depth perception, and the ability to focus, • Regularly required to sit, use hands and fingers, operate computer keyboard and controls, and communicate verbally and in writing, • Must be physically able to commute to buildings Base salary is only one part of Rocket Lab's compensation package for this role. You may be eligible for company stock, or cash incentives, and can purchase discounted stock through Rocket Lab's Employee Stock Purchase Program. Employee benefits also include medical, dental, and vision insurance coverage; 401(k) retirement plan options; paid vacation, holidays, and sick leave; paid parental leave; and other discounts and perks. Base Pay Range (CO Only)$115,000—$170,000 USD WHAT TO EXPECT We're on a mission to unlock the potential of space to improve life on Earth, but that's not an easy task. It takes hard work, determination, relentless innovation, teamwork, grit, and an unwavering commitment to achieving what others often deem impossible. Our people out-think, out-work and out-pace. We pride ourselves on having each other's backs, checking our egos at the door, and rolling up our sleeves on all tasks big and small. We thrive under pressure, work to tight deadlines, and our focus is always on how we can deliver, rather than dwelling on the challenges that stand in the way. Important information: FOR CANDIDATES SEEKING TO WORK IN US OFFICES ONLY: To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR), Rocket Lab Employees must be a U.S. citizen, lawful U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum, or be eligible to obtain the required authorizations from the U.S. Department of State and/or the U.S. Department of Commerce, as applicable. Learn more about ITAR here. Rocket Lab 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, gender identity or expression, or any other characteristic protected by federal, state or local laws. This policy applies to all terms and conditions of employment at Rocket Lab, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training. Applicants requiring a reasonable accommodation for the application/interview process for a job in the United States should contact Giulia Johnson at dedicated resource is intended solely to assist job seekers with disabilities whose disability prevents them from being able to apply/interview. Only messages left for this purpose will be considered. A response to your request may take up to two business days. FOR CANDIDATES SEEKING TO WORK IN NEW ZEALAND OFFICES ONLY: For security reasons background checks will be undertaken prior to any employment offers being made to an applicant. These checks will include nationality checks as it is a requirement of this position that you be eligible to access equipment and data regulated by the United States' International Traffic in Arms Regulations. Under these Regulations, you may be ineligible for this role if you do not hold citizenship of Australia, Japan, New Zealand, Switzerland, the European Union or a country that is part of NATO, or if you hold ineligible dual citizenship or nationality. For more information on these Regulations, click here ITAR Regulations.

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