Tier II Linux Systems Administrator (HPC) - Top Secret Clearance w/SCI eligibility

American Systems • Arlington, VA

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About The Position

AMERICAN SYSTEMS , a 100% employee-owned federal government contractor, is seeking a Tier II Linux Systems Administrator to support a classified High-Performance Computing (HPC) environment in Arlington, VA . Are you an experienced Linux administrator with strong system fundamentals wanting to expand your skillset into HPC environments ? If so, this role is for you! You will work alongside senior system administrators and engineers, receiving hands-on exposure to HPC platforms , distributed storage, and advanced compute technologies while supporting secure, production Linux systems.

Requirements

• Active Top Secret clearance with SCI eligibility
• U.S. citizenship required
• Bachelor’s degree in a STEM discipline or equivalent relevant experience
• 5–7 years of Linux systems administration experience in production environments
• Experience providing Tier I or Tier II operational support, including troubleshooting and ticket triage
• Hands-on Linux administration experience , including user management, permissions, services, and system monitoring
• Scripting experience using BASH or Python for system administration tasks
• Experience supporting VMware vSphere environments
• Working knowledge of RMF and Linux system hardening
• Current DoD 8140 IAT Level II certification ( Security+ CE or equivalent)
• Current RHCSA / RHCE certification or ability to obtain within 6 months of hire

Nice To Haves

• Exposure to high-performance computing, research, or lab-based environments
• Familiarity with distributed storage or cluster management tools ; Lustre or Bright Cluster experience is a plus
• Exposure to automation, containerization, or orchestration tools such as Ansible, Docker/Podman, or Kubernetes
• Familiarity with databases such as PostgreSQL
• Experience supporting GPU-enabled systems or AI/ML toolsets (CUDA, TensorFlow )

Responsibilities

• Provide Tier II Linux systems administration support for HPC users with professional, responsive customer service
• Support day-to-day operations and maintenance of HPC compute, storage, and networking environments
• Assist senior system administrators in optimizing hardware and software performance
• Ensure availability, integrity, and reliability of servers , workstations , and data storage systems , including Lustre and Bright Cluster
• Administer and manage Linux user accounts, groups, and permissions
• Triage Tier I/II service desk tickets and produce basic service metrics and reports
• Support installation, configuration, and testing of HPC system components , including compute servers, storage systems, networking equipment, and peripherals
• Assist with Linux server configuration, backup operations, and security-related tasks
• Perform hardware replacements not covered by vendor maintenance agreements
• Assist network personnel with equipment configuration, firewall support, and network security activities
• Implement program security requirements and comply with RMF controls
• Adhere to all IT policies, processes, and procedures
• Manage changing priorities in a fast-paced, mission-driven environment

Benefits

• AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 1,001-5,000 employees