At the intersection of national security and high-performance computing, COLSA Corporation looking 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. This position is 100% on-site.

• Architect and Deploy: Drive the secure deployment and lifecycle management of Linux workstations, enterprise servers, and HPC clusters.
• Control Filesystems: Efficiently administer local and remote filesystems, 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. 

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 here.

Required Qualifications

• 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

Preferred Qualifications

• 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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