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Qumulo's cloud data platform manages exabytes of the world's most demanding data, unifying files, objects, and every workload across edge, core, and cloud. Customers are the lifeblood of our company and Qumulo is looking for strategic, customer-focused, and results-driven Customer Success Engineers (CSEs) with a strong background in cloud technologies. CSEs will engage and work with our customers to answer technical questions or resolve complex issues primarily focusing on cloud environments such as AWS and Azure. The CSE is ultimately responsible for the complete life cycle of a customer issue and ensuring proper communication and resolution. Troubleshoot issues on the Qumulo product in both On-Premises or Cloud file systems, including cloud infrastructure issues, permissions problems, performance issues, and general file system issues Prioritize and drive resolution for escalated customer issues in both cloud and on-premises environments Work cross-functionally with our sales, product, and engineering teams to ensure customer issues are quickly resolved Provide feedback to engineering and product teams on product gaps and areas of improvement, particularly related to cloud offerings Collaborate with peers and mentors on complex issues Consistently grow knowledge and expand skill sets in cloud technologies Multi-lingual with English as primary customer support delivery language Excellent written and verbal communication skills Strong problem-solving skills with a can-do attitude in a fast paced environment Demonstrated working knowledge of major cloud platforms, including compute, storage, networking, and identity management services Basic network troubleshooting skills and understanding of general network technologies Familiarity with Linux & Windows operating systems Familiarity with Windows Active Directory or LDAP Understanding of file permissions and access control in cloud environments 5 - 7 years experience in a customer-facing role, including 1-3 years of troubleshooting cloud environments Python Programming skills are a plus Relevant cloud certifications (e.g., AWS Certified SysOps Administrator, Microsoft Certified: Azure Administrator Associate) are a plus, but not required Must have the right to work in the UK without visa sponsorship. About Qumulo: Built for the most demanding enterprise workloads, from AI and HPC simulations to Splunk Observability, genomics and PACS medical imaging, geospatial datasets, media editing and rendering, and video surveillance, Qumulo unlocks the full power of an organization’s information. Our platform unifies file and object storage across data centers, edge, and public clouds, enabling efficient, accelerated computing and extending the reach of data unbound by protocol or transport limitations. With more than 1,100 customers and exabytes of data under management, Qumulo powers mission-critical workloads anywhere real-time access to massive file datasets is non-negotiable. Qumulo delivers radical simplicity, hardware freedom, exceptional customer support, and a true hybrid-cloud architecture. Our Values: At Qumulo, we are building an open and collaborative culture where people can do their best work with customers as our magnetic field. We act as owners, we share by default, we are data driven and experimental and as an inclusive workplace, we encourage and celebrate multiple points of view. As part of our culture we believe diversity drives innovation. Equal Opportunity Employer: Qumulo is an Equal Opportunity Employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, disability, military status, national origin, or any other characteristic protected under federal, state, or applicable local law. For more information on Qumulo's Applicant Privacy Policy, please visit: _

KBR, Inc. is seeking a Senior Network Administrator to manage and secure enterprise network infrastructure across locations. You will lead administration of LAN/WAN, data centre networking, SD-WAN, and cloud connectivity, ensuring availability and performance. The role emphasizes independent work with minimal supervision and collaboration with IT teams across the business. Experience with firewalls, VPNs, load balancing, and disaster recovery is preferred. #J-18808-Ljbffr

Toyota Financial Services in the Fleet Business Unit is seeking an organised administrator to build, maintain and service relationships with the Toyota and Redline brands, Dealer Network, Fleet Field Sales Team and Fleet customers. You will work with our Fleet teams to resolve dealer queries, handle settlements, prepare credit line documentation and manage pay-outs across brands. The role offers hybrid working (2 days in office, 3 days remote), wellbeing initiatives, dress-for-your-day policy #J-18808-Ljbffr

Lead IT Network Administrator, Network, Voice, AV KBR is seeking a Lead IT Network Administrator (Network, Voice & AV) to join our team supporting complex, mission critical IT infrastructure across enterprise and secure environments.

Senior Network Administrator to maintain and secure our global enterprise network infrastructure across LAN, WAN, data centres and cloud connections. Responsibilities include administering network security controls, firewall technologies, VPN connectivity, and SD-WAN.

Title: Zscaler Administrator - Application Packaging About KBR At KBR, we deliver innovative science, technology, engineering and mission-critical solutions that help governments and organisations achieve their most important objectives. Our people tackle complex challenges every day, making a real difference on a global scale. We're looking for an experienced Zscaler Administrator to join our growing UK team and play a key role in supporting and enhancing our enterprise Zero Trust security platform. If you're passionate about secure access technologies, cloud networking, cybersecurity, and solving complex technical challenges, this is an exciting opportunity to work within a large-scale, highly regulated environment while enjoying the flexibility of a remote role. • Administer and optimise Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA) platforms, • Manage policies, access controls, application segments, authentication integrations, and traffic forwarding, • Support and troubleshoot Zscaler Client Connector, App Connectors, and cloud-based connectivity services, • Work closely with cybersecurity, cloud, network, infrastructure, and application teams to resolve complex issues, • Support onboarding and segmentation of business applications within the ZPA environment, • Monitor platform performance, availability, security events, and user experience, • Contribute to automation initiatives using technologies such as PowerShell, Python, Terraform, and APIs, • Assist with incident response, vulnerability remediation, risk assessments, and continuous service improvement, • Produce technical documentation, operational reporting, and platform metrics, • Strong hands‑on experience with Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA), • Experience managing Zscaler policies, authentication, application segmentation, and secure access controls, • Proven troubleshooting skills across access, identity, networking, and cloud connectivity issues, • Good knowledge of Microsoft Azure networking and infrastructure services, • Experience supporting Windows Server, Active Directory, DNS, certificates, and authentication services, • A solid understanding of enterprise networking concepts including routing, firewalls, proxies, VPNs, and network security, • Experience working within structured IT service management and change control environments, • Strong communication skills and the ability to work effectively with both technical and non‑technical stakeholders, • Microsoft Entra ID, Conditional Access, MFA, and SSO, • Microsoft Sentinel, Defender, Splunk, or SIEM platforms, • Zscaler Digital Experience (ZDX), • Cloud security and Zero Trust architectures, • PowerShell, Python, Terraform, or automation tooling, • Palo Alto, Cisco, F5, or similar enterprise networking technologies, • Microsoft Intune and endpoint security solutions, • Supporting highly regulated or security‑conscious environments, • Zscaler Certified Administrator (ZCA), • Zscaler Certified Engineer (ZCE), • Microsoft Azure certifications, • Security+ or CCNA, • Equivalent industry‑recognised qualifications Remote‑based role within the United Kingdom Occasional travel to our Surrey‑area office may be required UK citizenship is required Candidates must be eligible to obtain or hold BPSS clearance At KBR, our people are at the heart of everything we do. We are committed to creating an inclusive environment where individuals can Belong, Connect and Grow. You'll have the opportunity to work alongside talented professionals on meaningful projects while developing your career in a supportive and forward‑thinking organisation. KBR — Delivering Solutions, Changing the World. KBR brings together the best and brightest to deliver science, technology and engineering solutions that help governments and companies around the world accomplish their most critical missions and objectives. In everything we do, we are guided by our ONE KBR Values: We Value Our People – We create diverse, inclusive environments in which each person can feel safe, respected and valued, and where everyone has opportunities to grow and reach their full potential. We Deliver – We are uncompromising in our commitment to deliver innovative, high‑quality, technology‑led solutions for our customers and exceptional, sustainable value for all our stakeholders. We Are People of Integrity – We value honesty, trust, courage, fairness, prudence and tenacity. We believe doing what’s right for the planet, the communities where we work, and our people is good for business. We Empower – We empower our people with a shared purpose, the right tools and the supportive culture they need to be proactive decision‑makers, to be adaptive to change, and to succeed. We Are a Team of Teams – We have a will to succeed, but we value the achievements of our team of teams over individual accomplishments. Our collective focus makes us a better, stronger, more effective company. We have also embedded environmental, social and governance (ESG) principles in every business operation and corporate function. Not only are we committed to operating safely, sustainably and equitably, but we are also committed to using our capabilities and expertise to help our customers accomplish their sustainability goals. Worldwide, KBR employs a diverse workforce approximately 29,000 people strong, with customers in more than 80 countries and operations in 40 countries. At KBR, We Deliver. #J-18808-Ljbffr

KBR, Inc. seeks a Lead IT Network Administrator (Network, Voice & AV) to lead the administration, optimisation, and support of networking, voice, and audiovisual services across enterprise and secure environments. The successful candidate will bring strong Cisco networking expertise, network security, cloud connectivity, and unified communications, while serving as a key escalation point for operations and infrastructure projects. #J-18808-Ljbffr

Title: Senior Network Administrator. The Senior Network Administrator is responsible for the administration, maintenance, security, and operational reliability of enterprise network infrastructure supporting KBR operations.

Lead IT Network Administrator, Network, Voice, AV. KBR is seeking a Lead IT Network Administrator (Network, Voice & AV) to join our team supporting complex, mission critical IT infrastructure across enterprise and secure environments. Support Microsoft Azure networking services, including virtual ne

KBR, Inc. is seeking a Zscaler Administrator to maintain and evolve our ZIA/ZPA environment, ensuring secure access to applications, cloud services and internet resources across the UK. You will collaborate with cybersecurity, cloud, network and application teams in a remote-based role, applying automation and scripting to enhance reliability and security, with occasional travel to the Surrey-area office. #J-18808-Ljbffr

KBR is seeking a Zscaler Administrator to join our UK team, focusing on securing and optimizing enterprise Zero Trust access. You will manage ZIA/ZPA platforms, configure policies, and collaborate across cybersecurity, cloud, and network teams to deliver reliable, scalable secure connectivity.

KBR is seeking a Senior Zscaler Administrator to join our global cybersecurity and secure access team. This senior-level engineering role combines Zero Trust architecture, secure access administration, cloud security, endpoint integration, automation, and operational excellence across complex enterprise environments. You will play a key role in supporting and enhancing enterprise secure access services across Zscaler Internet Access (ZIA), Zscaler Private Access (ZPA), Zscaler Digital Experience (ZDX), and Zscaler Client Connector (ZCC), helping to strengthen security controls while enabling a modern, distributed workforce. Partnering closely with cybersecurity, networking, identity, endpoint, cloud, infrastructure, and service delivery teams, you will design, implement, and support secure access solutions that improve user experience, reduce operational risk, and advance KBR's Zero Trust and SASE capabilities. The ideal candidate brings deep expertise across Zscaler technologies, enterprise networking, identity integrations, and secure access platforms, with a proven ability to support large-scale, highly regulated environments. This is a permanent, full-time position based in the United Kingdom. Due to the nature of the work and customer requirements, candidates must be eligible to obtain and maintain the appropriate UK Security Clearance. In September 2025, KBR announced that we are spinning our Mission Technology Solutions business into a separate public company. This role will ultimately be part of the new company. The Mission Technology Solutions business partners with governments and defense, intelligence, space, aviation, and critical infrastructure customers to deliver high-end engineering, science, technology, and mission support solutions. • Administer, support, and enhance Zscaler Internet Access (ZIA), Zscaler Private Access (ZPA), Zscaler Digital Experience (ZDX), and Zscaler Client Connector (ZCC) environments., • Configure and maintain access policies, forwarding profiles, application segments, connector groups, URL filtering, SSL inspection, cloud firewall controls, and data protection policies., • Monitor platform health, user experience, security events, application access, performance metrics, and operational trends across the Zscaler ecosystem., • Troubleshoot complex client connectivity, authentication, application access, policy enforcement, and cloud security issues independently., • Support deployment, lifecycle management, upgrades, remediation, and troubleshooting of Zscaler Client Connector across Windows, macOS, iOS, and Android devices., • Partner with endpoint management teams to deploy and maintain Zscaler Client Connector using Microsoft Intune, Windows Autopilot, Jamf, and similar endpoint management platforms., • Support integrations with Microsoft Entra ID, Active Directory, Conditional Access, Single Sign-On (SSO), Multifactor Authentication (MFA), and related identity services., • Deploy, validate, and maintain ZPA App Connectors across on-premises, cloud, hybrid, and segmented network environments., • Participate in incident, problem, change, and vulnerability management processes within enterprise CAB-controlled environments., • Develop automation, scripts, reporting, and operational tooling to support compliance validation, health monitoring, troubleshooting, and remediation activities., • Create and maintain technical documentation, operational standards, implementation guides, support runbooks, and knowledge transfer materials., • Collaborate with cybersecurity, networking, endpoint, cloud, infrastructure, and service management teams to improve secure access capabilities and operational maturity., • Support strategic initiatives including Zero Trust transformation, SASE adoption, VPN modernization, tenant migrations, divestitures, and enterprise technology transformation programmes., • Drive continuous improvement initiatives focused on automation, service reliability, operational efficiency, and user experience., • Bachelor's degree in Cybersecurity, Information Technology, Computer Science, Engineering, Information Systems, or a related discipline; or an equivalent combination of education, technical training, certifications, and relevant experience., • 7+ years of experience supporting enterprise cybersecurity, networking, secure access, or cloud security environments., • Hands‑on experience administering Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA) within complex enterprise organisations., • Experience supporting secure remote access, cloud security platforms, application connectivity, and Zero Trust security initiatives., • Experience working within large‑scale, highly regulated environments., • Eligibility to obtain and maintain the appropriate UK Security Clearance., • Deep expertise administering Zscaler Internet Access (ZIA), Zscaler Private Access (ZPA), Zscaler Digital Experience (ZDX), and Zscaler Client Connector (ZCC)., • Strong knowledge of Zero Trust Network Access (ZTNA), Secure Access Service Edge (SASE), and modern secure access architectures., • Experience managing access policies, forwarding profiles, application segments, connector groups, URL filtering, SSL inspection, cloud firewall controls, and data protection capabilities., • Strong understanding of TCP/IP, DNS, routing, VPN technologies, proxies, firewall technologies, and secure web gateway concepts., • Experience troubleshooting SSL/TLS inspection, certificate services, authentication flows, identity integrations, and SSO technologies., • Knowledge of segmentation, least‑privilege access models, security policy enforcement, and access governance principles., • Experience supporting Microsoft Entra ID, Active Directory, Conditional Access, MFA, and hybrid identity environments., • Familiarity with Microsoft Intune, endpoint compliance frameworks, and modern endpoint management practices., • Strong PowerShell scripting and automation skills., • Experience with log analysis, packet capture interpretation, root‑cause analysis, and structured troubleshooting methodologies., • Excellent communication, documentation, stakeholder management, and technical problem‑solving capabilities., • Experience supporting Microsoft Defender for Endpoint, Microsoft 365 Security, and integrated Microsoft security platforms., • Knowledge of Microsoft Azure administration, cloud networking, and hybrid cloud infrastructure., • Experience with SIEM integrations, log analytics, reporting platforms, dashboarding, and security monitoring solutions., • Experience with Bash scripting, automation tools, and infrastructure operations., • Experience supporting government, defence, aerospace, critical infrastructure, energy, transportation, or other highly regulated sectors., • Familiarity with UK government security frameworks, Cyber Essentials Plus, NCSC guidance, ISO 27001, NIST frameworks, and other relevant security and compliance standards., • Experience supporting secure access transformations, VPN replacement initiatives, mergers, acquisitions, divestitures, tenant migrations, or large-scale enterprise modernisation programmes., • Zscaler Certified Cloud Administrator (ZCCA) or equivalent Zscaler administrator certification, • Zscaler Certified Cloud Professional (ZCCP) or specialised ZIA/ZPA certifications., • Microsoft security, identity, endpoint, or Azure certifications., • CompTIA Security+, CISSP, CISM, CCSP, or equivalent cybersecurity certifications., • Microsoft Certified: Cybersecurity Architect Expert, Azure Administrator Associate, or other relevant cloud security certifications. R2127192 #J-18808-Ljbffr

Senior IT Systems Administrator (Linux & HPC) KBR is a global provider of differentiated, professional services and technologies delivered across a wide government, defense and industrial base. Drawing from its rich 100-year history and culture of innovation and mission focus, KBR creates sustainable value by combining engineering, technical and scientific expertise with its full life cycle capabilities to help our clients meet their most pressing challenges today and into the future. We deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 37,000 people worldwide with customers in more than 80 countries and operations in over 29 countries. KBR is proud to work with its customers across the globe to provide technology, value-added services, and long-term operations and maintenance services to ensure consistent delivery with predictable results. At KBR, We Deliver. KBR is looking for a Senior IT Systems Administrator (Linux & HPC). The Senior IT Systems Administrator (Linux & HPC) is responsible for the administration, maintenance, security and operational reliability of Linux-based enterprise and high-performance computing platforms. The role will provide hands-on technical ownership across Linux operating systems, HPC compute, workload scheduling and associated storage and network services. A major focus will be the operation of cloud and co-located HPC platforms. The position requires strong Linux engineering experience, practical knowledge of HPC environments, including NVIDIA Base Command Manager, Azure CycleCloud and SLURM. The ability to diagnose complex cross-platform issues, and the confidence to work independently while acting as a senior technical resource for colleagues is also essential. This role does not include formal supervisory or people-management accountability • Administer, configure, patch, harden and upgrade enterprise Linux server platforms, with particular emphasis on Red Hat Enterprise Linux or comparable distributions., • Manage core Linux services including identity and access integration, SSH, DNS client configuration, time synchronisation, software repositories, filesystems, logging and scheduled services., • Automate repeatable administration using shell scripting and configuration-management or orchestration tooling., • Monitor Linux performance, availability, capacity and security, and resolve complex operating-system and application integration issues., • Maintain build standards, technical documentation, operational procedures and recovery runbooks., • Operate and support HPC clusters spanning management, login, compute and storage components., • Administer SLURM, including queues and partitions, scheduling policies, job submission, accounting, fair-share, reservations and troubleshooting failed or poorly performing workloads., • Support NVIDIA Base Command Manager and Azure CycleCloud for cluster provisioning, node lifecycle management, monitoring and integration with SLURM., • Work with engineering and scientific users to diagnose job, compiler, library, MPI, resource-allocation and performance issues., • Plan and execute maintenance activities while protecting service availability and active workloads., • Administer physical and virtual server infrastructure and support hardware lifecycle, firmware and operating-system maintenance., • Support Cisco compute infrastructure and its integration with Linux and HPC management services., • Operate and support NetApp file and data services used by Linux and HPC platforms, including provisioning, permissions, capacity, performance and availability., • Apply a working understanding of high-speed networking, IP addressing, routing, DNS, NFS, network dependencies and storage connectivity to end-to-end troubleshooting., • Collaborate with network, security, application and storage specialists, vendors and service providers to resolve cross-domain incidents., • Apply secure configuration, least privilege, vulnerability remediation and audit controls to Linux and HPC systems., • Ensure backup, restore and disaster-recovery requirements are defined, implemented and regularly tested for supported platforms., • Monitor service health and capacity, respond to incidents, identify root cause and contribute to problem management., • Plan and deliver changes through established change-management processes, including risk assessment, testing, implementation and back-out planning., • Participate in an appropriate operational support or on-call arrangement where required., • Provide technical guidance, peer review and knowledge transfer to infrastructure colleagues and service-desk teams., • Substantial hands-on experience administering Linux in a complex enterprise or research-computing environment., • Practical experience supporting HPC clusters and diagnosing issues across compute, scheduler, storage and network layers., • Strong operational knowledge of SLURM administration and workload troubleshooting., • Competence in Bash or another relevant scripting language, with a track record of automating administrative tasks., • Experience with Linux performance analysis, capacity management, patching, security hardening and vulnerability remediation., • Experience operating shared file services and troubleshooting NFS, permissions, throughput, latency and capacity issues., • Working knowledge of enterprise networking fundamentals and distributed-system dependencies., • Experience delivering controlled technical change and maintaining accurate documentation in a structured IT service-management environment., • Experience with NVIDIA Base Command Manager, Bright Cluster Manager or a comparable HPC cluster-management platform., • Experience with Cisco compute platforms and associated server-management tooling., • Experience administering NetApp storage in Linux or HPC environments., • Knowledge of InfiniBand or other high-speed, low-latency fabrics., • Experience with MPI workloads, environment modules, compilers, engineering or scientific applications, and common HPC software stacks., • Experience with Ansible, Git and infrastructure-as-code practices., • Experience with virtualisation, containers or cloud-hosted Linux workloads., • Knowledge of backup, recovery, monitoring and observability platforms used in enterprise infrastructure., • Able to work independently with minimal supervision and take technical ownership through to resolution., • Demonstrated ability to analyse complex problems, prioritise operational risk and exercise sound technical judgement., • Clear written and verbal communication, including the ability to explain technical issues to specialists and non-specialists., • Strong operational discipline, attention to detail and commitment to secure, reliable and supportable services., • Collaborative approach and willingness to coach colleagues and share knowledge., • Bachelor’s degree in computing, engineering or a related field with relevant experience, or an equivalent combination of professional training and substantial practical experience., • Relevant Linux, HPC, Cisco, NVIDIA or NetApp certifications are advantageous but not essential. When you become part of the KBR team, your opportunities are endless. Through collaboration with our customers, we’re defining tomorrow’s challenges, then providing the solutions and services to overcome those challenges, always maintaining our commitment to total safety and reliability. At KBR, we partner with government and industry clients to provide purposeful and comprehensive solutions with an emphasis on efficiency and safety. With a full portfolio of services, proprietary technologies and expertise, our employees are ready to handle projects and missions throughout their entire lifecycle, from planning and design to sustainability and maintenance. Whether at the bottom of the ocean or in outer space, our clients trust us to deliver the impossible on a daily basis. Working at KBR means being rewarded for your contributions. In addition to competitive benefits and professional development, our people are empowered to use all their potential, creating meaningful change for themselves and our clients. We attract the best minds in the world because our expertise thrives on creativity, resourcefulness and collaboration. That is how we supply our clients with cutting-edge solutions and services. As the needs of the world change, we’re ready to respond and guide the way forward with strategic, sustainable, and technological advancements grounded in more than a century of practical application and execution. #LI-EF1 #LI-HYBRID #J-18808-Ljbffr

Senior IT Systems Administrator (Linux & HPC)KBR is a global provider of differentiated, professional services and technologies delivered across a wide government, defense and industrial base. Drawing from its rich 100-year history and culture of innovation and mission focus, KBR creates sustainable value by combining engineering, technical and scientific expertise with its full life cycle capabilities to help our clients meet their most pressing challenges today and into the future.We deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 37,000 people worldwide with customers in more than 80 countries and operations in over 29 countries. KBR is proud to work with its customers across the globe to provide technology, value-added services, and long-term operations and maintenance services to ensure consistent delivery with predictable results. At KBR, We Deliver.KBR is looking for a Senior IT Systems Administrator (Linux & HPC).The Opportunity:The Senior IT Systems Administrator (Linux & HPC) is responsible for the administration, maintenance, security and operational reliability of Linux-based enterprise and high-performance computing platforms. The role will provide hands-on technical ownership across Linux operating systems, HPC compute, workload scheduling and associated storage and network services.A major focus will be the operation of cloud and co-located HPC platforms. The position requires strong Linux engineering experience, practical knowledge of HPC environments, including NVIDIA Base Command Manager, Azure CycleCloud and SLURM. The ability to diagnose complex cross-platform issues, and the confidence to work independently while acting as a senior technical resource for colleagues is also essential. This role does not include formal supervisory or people-management accountabilityKey ResponsibilitiesLinux Systems Administration Administer, configure, patch, harden and upgrade enterprise Linux server platforms, with particular emphasis on Red Hat Enterprise Linux or comparable distributions. Manage core Linux services including identity and access integration, SSH, DNS client configuration, time synchronisation, software repositories, filesystems, logging and scheduled services. Automate repeatable administration using shell scripting and configuration-management or orchestration tooling. Monitor Linux performance, availability, capacity and security, and resolve complex operating-system and application integration issues.* Maintain build standards, technical documentation, operational procedures and recovery runbooks.HPC Platform & Workload Scheduling Operate and support HPC clusters spanning management, login, compute and storage components. Administer SLURM, including queues and partitions, scheduling policies, job submission, accounting, fair-share, reservations and troubleshooting failed or poorly performing workloads. Support NVIDIA Base Command Manager and Azure CycleCloud for cluster provisioning, node lifecycle management, monitoring and integration with SLURM. Work with engineering and scientific users to diagnose job, compiler, library, MPI, resource-allocation and performance issues.* Plan and execute maintenance activities while protecting service availability and active workloads.Compute, Storage & Infrastructure Integration Administer physical and virtual server infrastructure and support hardware lifecycle, firmware and operating-system maintenance. Support Cisco compute infrastructure and its integration with Linux and HPC management services. Operate and support NetApp file and data services used by Linux and HPC platforms, including provisioning, permissions, capacity, performance and availability. Apply a working understanding of high-speed networking, IP addressing, routing, DNS, NFS, network dependencies and storage connectivity to end-to-end troubleshooting.* Collaborate with network, security, application and storage specialists, vendors and service providers to resolve cross-domain incidents.Security, Resilience & Operational Support Apply secure configuration, least privilege, vulnerability remediation and audit controls to Linux and HPC systems. Ensure backup, restore and disaster-recovery requirements are defined, implemented and regularly tested for supported platforms. Monitor service health and capacity, respond to incidents, identify root cause and contribute to problem management. Plan and deliver changes through established change-management processes, including risk assessment, testing, implementation and back-out planning. Participate in an appropriate operational support or on-call arrangement where required. Provide technical guidance, peer review and knowledge transfer to infrastructure colleagues and service-desk teams.Qualifications, Skills and ExperienceEssential Technical Skills & Experience Substantial hands-on experience administering Linux in a complex enterprise or research-computing environment. Practical experience supporting HPC clusters and diagnosing issues across compute, scheduler, storage and network layers. Strong operational knowledge of SLURM administration and workload troubleshooting. Competence in Bash or another relevant scripting language, with a track record of automating administrative tasks. Experience with Linux performance analysis, capacity management, patching, security hardening and vulnerability remediation. Experience operating shared file services and troubleshooting NFS, permissions, throughput, latency and capacity issues. Working knowledge of enterprise networking fundamentals and distributed-system dependencies. Experience delivering controlled technical change and maintaining accurate documentation in a structured IT service-management environment.Desirable Technical Skills & Experience Experience with NVIDIA Base Command Manager, Bright Cluster Manager or a comparable HPC cluster-management platform. Experience with Cisco compute platforms and associated server-management tooling. Experience administering NetApp storage in Linux or HPC environments. Knowledge of InfiniBand or other high-speed, low-latency fabrics. Experience with MPI workloads, environment modules, compilers, engineering or scientific applications, and common HPC software stacks. Experience with Ansible, Git and infrastructure-as-code practices. Experience with virtualisation, containers or cloud-hosted Linux workloads. Knowledge of backup, recovery, monitoring and observability platforms used in enterprise infrastructure.Professional Capability Able to work independently with minimal supervision and take technical ownership through to resolution. Demonstrated ability to analyse complex problems, prioritise operational risk and exercise sound technical judgement. Clear written and verbal communication, including the ability to explain technical issues to specialists and non-specialists. Strong operational discipline, attention to detail and commitment to secure, reliable and supportable services.* Collaborative approach and willingness to coach colleagues and share knowledge.Education & Qualifications Bachelor's degree in computing, engineering or a related field with relevant experience, or an equivalent combination of professional training and substantial practical experience. Relevant Linux, HPC, Cisco, NVIDIA or NetApp certifications are advantageous but not essential.KBR Company InformationWhen you become part of the KBR team, your opportunities are endless. Through collaboration with our customers, we’re defining tomorrow’s challenges, then providing the solutions and services to overcome those challenges, always maintaining our commitment to total safety and reliability.At KBR, we partner with government and industry clients to provide purposeful and comprehensive solutions with an emphasis on efficiency and safety. With a full portfolio of services, proprietary technologies and expertise, our employees are ready to handle projects and missions throughout their entire lifecycle, from planning and design to sustainability and maintenance. Whether at the bottom of the ocean or in outer space, our clients trust us to deliver the impossible on a daily basis.Working at KBR means being rewarded for your contributions. In addition to competitive benefits and professional development, our people are empowered to use all their potential, creating meaningful change for themselves and our clients. We attract the best minds in the world because our expertise thrives on creativity, resourcefulness and collaboration. That is how we supply our clients with cutting-edge solutions and services.As the needs of the world change, we’re ready to respond and guide the way forward with strategic, sustainable, and technological advancements grounded in more than a century of practical application and execution. #J-18808-Ljbffr

KBR is seeking a Lead IT Network Administrator to oversee Cisco networking, security, and unified communications across multiple sites in the UK. The role focuses on optimizing, securing, and supporting networked services within regulated environments. You will lead a team handling complex infrastructure, cloud connectivity, and network reliability, while coordinating with cybersecurity, cloud, and application teams to deliver resilient services in mission-critical settings. #J-18808-Ljbffr

Title: Senior Network Administrator KBR is a global provider of differentiated, professional services and technologies delivered across a wide government, defense and industrial base. Drawing from its rich 100-year history and culture of innovation and mission focus, KBR creates sustainable value by combining engineering, technical and scientific expertise with its full life cycle capabilities to help our clients meet their most pressing challenges today and into the future. We deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 37,000 people worldwide with customers in more than 80 countries and operations in over 29 countries. KBR is proud to work with its customers across the globe to provide technology, value-added services, and long-term operations and maintenance services to ensure consistent delivery with predictable results. At KBR, We Deliver. KBR is looking for a Senior Network Administrator. The Senior Network Administrator is responsible for the administration, maintenance, security, and operational reliability of enterprise network infrastructure supporting KBR operations. The role provides advanced technical administration across network, connectivity, security, and related infrastructure platforms, ensuring the availability, performance, and resilience of critical services. The position requires deep technical knowledge of enterprise networking technologies, the ability to resolve complex operational issues, and the capability to work independently with minimal guidance. The role contributes directly to service stability, operational excellence, and infrastructure modernization initiatives while acting as a technical resource for colleagues within the team. This role does not include supervisory or people management accountability. • Administer enterprise network infrastructure, including:, • LAN, WAN, wireless, and data centre networking platforms, • Routing and switching technologies, • Software-defined networking and SD-WAN environments, • Network access control and identity-aware networking services, • Install, configure, maintain, and upgrade network infrastructure in accordance with operational standards., • Perform routine lifecycle management activities, including software updates, hardware maintenance, and technology refresh activities., • Maintain accurate network documentation, configuration standards, and operational records., • Administer and support enterprise network security technologies, including firewalls, VPN services, and secure remote-access solutions., • Maintain network segmentation, access control, and secure connectivity frameworks., • Support vulnerability remediation and implementation of network security controls., • Ensure network services comply with organisational security standards and governance requirements., • Support enterprise data centre networking environments and associated connectivity services., • Administer load balancing and application delivery platforms., • Support hybrid cloud and cloud networking services., • Maintain reliable connectivity between on-premises infrastructure, cloud platforms, remote locations, and hosted environments., • Support network architecture and capacity growth initiatives., • Collaborate with server, storage, backup, cloud, and cybersecurity teams to ensure reliable infrastructure operations., • Support infrastructure services where networking dependencies exist., • Maintain a working understanding of compute, virtualisation, storage, and application dependencies to support effective troubleshooting and escalation., • Contribute to infrastructure availability, resilience, and recovery initiatives., • Monitor network health, availability, performance, and capacity using established operational tools and procedures., • Diagnose and resolve complex networking and infrastructure incidents., • Support incident, problem, and change management processes., • Participate in major incident investigations and root-cause analysis activities., • Maintain technical documentation, operational runbooks, and support procedures., • Support network-related disaster recovery and resilience initiatives., • Participate in infrastructure recovery testing and operational readiness activities., • Maintain network configurations and controls that support business continuity objectives., • Ensure network services remain compliant with organisational security and audit requirements., • Work independently on assigned systems and operational activities., • Collaborate with related IT teams, service providers, and project teams to resolve technical issues., • Act as a technical resource and provide guidance to colleagues with less experience., • Contribute to operational improvements, technical standards, and infrastructure modernization initiatives., • Support project delivery and technology implementation activities as required., • Strong hands-on experience supporting enterprise networking environments., • Experience with routing, switching, network segmentation, and secure connectivity technologies., • Experience with network access control, identity-aware networking, and enterprise security platforms., • Experience supporting firewall technologies, VPN solutions, and secure remote access services., • Experience with load balancing and application delivery technologies., • Experience supporting cloud networking and hybrid connectivity solutions., • Experience supporting enterprise infrastructure environments including Windows, Linux, and virtualisation platforms., • Familiarity with structured IT operational environments and service management processes., • Experience troubleshooting complex networking and infrastructure-related issues., • Able to work independently with minimal supervision., • Demonstrated ability to analyse and resolve complex technical problems., • Exercises sound technical judgement using multiple sources of information., • Strong operational discipline and attention to detail., • Effective written and verbal communication skills., • Ability to collaborate effectively across technical and business teams., • Bachelor’s degree in Information Technology, Computer Science, Engineering, or a related field with relevant experience., • Equivalent combination of related training and professional experience. When you become part of the KBR team, your opportunities are endless. Through collaboration with our customers, we’re defining tomorrow’s challenges, then providing the solutions and services to overcome those challenges, always maintaining our commitment to total safety and reliability. At KBR, we partner with government and industry clients to provide purposeful and comprehensive solutions with an emphasis on efficiency and safety. With a full portfolio of services, proprietary technologies and expertise, our employees are ready to handle projects and missions throughout their entire lifecycle, from planning and design to sustainability and maintenance. Whether at the bottom of the ocean or in outer space, our clients trust us to deliver the impossible on a daily basis. Working at KBR means being rewarded for your contributions. In addition to competitive benefits and professional development, our people are empowered to use all their potential, creating meaningful change for themselves and our clients. We attract the best minds in the world because our expertise thrives on creativity, resourcefulness and collaboration. That is how we supply our clients with cutting‑edge solutions and services. As the needs of the world change, we’re ready to respond and guide the way forward with strategic, sustainable, and technological advancements grounded in more than a century of practical application and execution. #LI-EF1 #LI-HYBRID #J-18808-Ljbffr

Key requirementsUK Citizenship is requiredCurrent BPSS clearance or higherHands-on Cisco networking experience (Nexus, ISE, SD-WAN, data centre networking)Experience with Nexus environments, Leaf-Spine, VXLA

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