MSIC - HPC Linux Systems Administrator

Job Description At the intersection of national security and high-performance computing, COLSA Corporation looks for a Linux Systems Administrator who thrives on complexity. You won’t just be patching servers; you’ll be the architect of the infrastructure supporting our most critical missions. From tuning HPC clusters to orchestrating secure containerized environments, your work ensures that our data stays fast, fluid, and impenetrable.

• Architect and Deploy:
  Drive the secure deployment and lifecycle management of Linux workstations, enterprise servers, and HPC clusters.
• Control File systems:
  Efficiently administer local and remote file systems, ensuring data integrity and high-speed access across the network.
• Automate Everything:
  Eliminate manual toil by developing sophisticated automation scripts using Shell and Python.
• Hardened Security:
  Implement and manage robust security layers, including advanced firewall configurations and fine‑tuned SELinux policies.
• Orchestrate at Scale:
  Drive system consistency and rapid deployment using Ansible for configuration management and automation.
• Containerization:
  Modernize workflows by deploying and managing containerized environments using Docker, Podman, and Apptainer.
• HPC Optimization:
  Maintain and push the performance limits of HPC clusters utilizing industry‑leading tools like Bright, Slurm, and xCAT.
• Network Engineering:
  Configure and optimize Linux networking services to ensure seamless, high‑bandwidth connectivity.
• Technical Documentation:
  Author and maintain high‑fidelity documentation for system configurations, operational playbooks, and strategic plans.

This position is 100% on‑site.

At COLSA, people are our most valuable resource and centered at our core value. We invite you to unite your talents with opportunity and be a part of our “Family of Professionals! Learn about our employee‑centric culture and benefits.

• Bachelor's degree in a STEM field or equivalent professional experience.
• Minimum of 5 to 12 years of related experience.
• Active DoD Top Secret Clearance with SCI eligibility.
• Must be able to pass the CI polygraph within 180 days of hire.
• CompTIA Security+ CE, ISC2 SSCP, or equivalent baseline security certification.
• Must be able to obtain and maintain Special Access Program (SAP) eligibility and maintain program accesses as required.
• Extensive professional experience in Linux system administration (RHEL preferred).
• Ability to troubleshoot and resolve intricate hardware and software bottlenecks under pressure.
• Knowledge of security best practices for Linux environments.
• Strong analytical and critical thinking skills with a methodical approach to complex systems challenges.
• Ability to work independently and collaboratively in a team environment.
• U.S. Citizenship Required.

• Active TS//SCI clearance with a current CI Scope Polygraph.
• RHCSA, Linux+, or equivalent certification.
• Experience with automation tools (Ansible, shell scripting, Python, etc.).
• Familiarity with container technologies like Docker, Podman, and Apptainer.
• Experience managing HPC clusters using Bright, Slurm, and/or xCAT.
• Strong networking experience in Linux environments.
• Cross‑OS administration experience with Windows.
• Virtualization experience with VMWare or Nutanix.

Applicant selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information. COLSA Corporation is an Equal Opportunity Employer, Minorities/Females/Veterans/Disabled. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, or national origin.

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