HPC / Linux Systems Administrator

About the role

VIRSIG is a mission-focused technology and infrastructure company dedicated to serving those who serve. We design, deploy, integrate, and sustain mission-critical construction, security, communications, and technology solutions for federal, state, local, and commercial customers. We are guided by our core values: People Matter, Do the Right Thing, Long-Term vs. Short-Term Focus, Endless Pursuit of Excellence, Be Heroic, Never Give Up.

Position Summary

VIRSIG is looking for an experienced HPC/Linux Systems Administrator to handle on-site system administration, operational support, and cybersecurity compliance for a Hewlett Packard Enterprise (HPE) High-Performance Computing cluster supporting Artificial Intelligence (AI) and Machine Learning (ML) workloads at NAVOCEANO, Stennis Space Center, MS. This system is a strategic Navy asset built on GPU accelerated compute nodes, an HPE Slingshot high-speed interconnect, a Lustre parallel file system, and image-based OS deployment infrastructure. If you enjoy solving complex technical challenges, working with cutting-edge HPC technologies, and supporting critical Department of Defense missions, we'd like to hear from you.

What You'll Do

• Install, configure, and maintain HPC components, including CPU/GPU compute nodes, the Slingshot interconnect, and the Lustre parallel file system
• Build and manage OS images for compute and service nodes so the software environment stays stable and consistent
• Manage user accounts, access controls, and resource allocation, and run the Slurm job scheduler
• Maintain system health and performance, handle routine maintenance and firmware updates, and coordinate hardware repairs with the vendor
• Keep system documentation current, including configuration details, troubleshooting steps, and security protocols
• Configure and manage the network, including switches, routers, and firewalls, and troubleshoot connectivity issues
• Manage HPC storage (Lustre, HPE Parallel File System, GPFS), including backups and capacity monitoring
• Install and maintain the HPC/AI-ML software stack (compilers, libraries, TensorFlow, PyTorch, Docker, Singularity/Apptainer) and manage licenses
• Support users with performance tuning, GPU utilization, and getting the most out of the interconnect and file system
• Harden systems to DISA STIG requirements and support quarterly STIG compliance checks and remediation
• Run vulnerability scans and fix what they find, monitor security logs, respond to incidents, and help with A&A/ATO documentation
• Train NAVOCEANO staff through on-the-job instruction and documentation, and carry out a knowledge transfer plan so government staff can run the system independently by the end of the contract
• Help with monthly status reports, quarterly program reviews, and other NAVOCEANO briefings as needed

Required Qualifications

• A U.S. citizen with an active DoD Top Secret clearance (Tier 5 investigation), adjudicated and in place before the contract start date
• Mets the OPM qualification standard for IT Specialist (2210) or Computer Scientist (1550) at the GS-12 level or above, roughly 4 years of specialized IT/network administration experience
• Has a Bachelor's degree in Computer Science, or a bachelor's degree with 30 semester hours in math, statistics, and computer science (at least 15 of those hours in calculus or statistics), or equivalent experience
• Has hands-on experience running Linux in an HPC environment
• Has experience with parallel file systems (Lustre), GPU accelerated compute nodes, and high-speed interconnects (HPE Slingshot)
• Has experience with job schedulers (Slurm) and containers (Docker, Singularity/Apptainer)
• Is familiar with DISA STIGs, vulnerability management, and DoD security frameworks (NIST 800-53, DoD Risk Management Framework)
• Has solid written and verbal communication skills, comfortable writing training materials and teaching government staff

Preferred Qualifications

• Experience with HPE Cray System Management or HPE Performance Cluster Manager
• Experience supporting AI/ML frameworks (TensorFlow, PyTorch) on HPC systems
• Prior work on a DoD or Navy system administration contract, ideally in scientific or oceanographic computing
• DoD 8570/8140 IA Technical Level I certification, or willingness to get it soon after hire