> Markdown version of [/jobs/ext/4328821-linux-systems-administrator-high-performance-computing](https://www.wearedevelopers.com/jobs/ext/4328821-linux-systems-administrator-high-performance-computing). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Linux Systems Administrator (High Performance Computing) - **Company:** TEKSYSTEMS INC. - **Location:** John C. Stennis Space Center, MS, United States - **Experience:** Expert - **Contract:** Temporary contract - **Skills:** Computing Platforms, CompTIA Security+, Data Centers, Linux, Linux System Administration, Red Hat Enterprise Linux, High Performance Computing, Software Troubleshooting, Information Technology - **Published:** October 6, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9217617/linux-systems-administrator-high-performance-computing ## About the Role * Active TS/SCI Security Clearance * CompTIA Security+ Certification * CompTIA Linux+ Certification * 10+ years of experience supporting HPC environments * Strong Linux Systems Administration experience * Experience supporting Red Hat Enterprise Linux (RHEL) environments * Ability to troubleshoot complex HPC issues independently * Experience planning and implementing system upgrades * Experience maintaining secure, compliant computing environments * Strong communication skills with the ability to train and mentor others Education & Experience * Master's degree in Computer Science or related field plus 5+ years of professional experience OR * 7+ years of relevant professional experience in lieu of a master's degree, * Data center operations experience * Experience supporting highly secure or classified environments * Strong troubleshooting and root-cause analysis skills * Familiarity with enterprise hardware platforms and infrastructure environments * Experience working alongside multi-disciplinary operations teams Work Environment * 100% onsite position * Secure compartmented environment (SCIF) * Collaborative team environment with experienced administrators available for support * Opportunity to transfer knowledge and influence long-term operational success Why This Role? This opportunity allows you to serve as a key administrator for a mission-critical HPC environment while helping develop the next generation of system administrators. You'll have ownership over system operations, upgrades, security compliance, and platform stability while working alongside an experienced technical team. Qualified candidates with an active TS/SCI clearance and strong HPC/Linux administration experience are encouraged to apply. ## Description We are seeking an experienced HPC Systems Administrator to support and maintain a large-scale High Performance Computing (HPC) environment within a secure government setting. This position is ideal for a Linux systems administrator with deep HPC experience who enjoys managing complex environments, maintaining security compliance, supporting mission-critical operations, and mentoring less experienced administrators. This is a hands-on role focused on system administration, cluster operations, security maintenance, upgrades, and knowledge transfer. Hardware break/fix support is handled by a separate team, allowing you to focus on administration and optimization of the HPC environment. What You'll Do * Administer and support a large HPC cluster in a production environment. * Monitor system health, performance, and availability. * Plan, coordinate, and execute operating system and infrastructure upgrades. * Maintain security compliance and implement required security controls. * Respond to user requests and troubleshoot system-related issues. * Manage production systems and support security hardening efforts. * Utilize HPC management tools to administer and monitor the environment. * Collaborate with engineering and operations teams to ensure platform stability. * Provide technical guidance and knowledge transfer to customer system administrators. * Mentor and train administrators on troubleshooting methodologies and operational processes. * Work independently while leveraging support from a broader technical team.