Senior Systems Administrator
About The Position
PSG is seeking an experienced Senior Linux Systems Administrator (SME) to support mission-critical environments, including a Centralized Supercomputing Facility (CSCF) High Performance Computing (HPC) environment and other government programs. In this role, you will support large-scale Linux infrastructure, troubleshoot complex system issues, and help maintain highly secure, high-performance computing environments. You'll work closely with engineers, support teams, and mission users to ensure systems remain stable, secure, and optimized for performance. This is an excellent opportunity for a hands-on Linux expert who enjoys solving complex system problems and supporting advanced computing platforms. Locations: Littleton, CO • King of Prussia, PA / Valley Forge, PA • Herndon, VA • Springfield, VA
Requirements
- Active TS/SCI with CI Polygraph (required to start)
- Bachelor's degree in Computer Science, Information Systems, or related field
- 10+ years of professional experience in Linux systems administration or related field
- At least 5 years of experience working in heterogeneous, multi-platform computing environments
- Strong experience with Linux system administration and troubleshooting
- Proficiency with Bourne/Bash scripting and Expect scripting
- Experience debugging Linux kernel issues, including reviewing source code and analyzing system logs
- Experience using Linux debugging and performance tools such as crash and systemtap
- Experience managing Satellite repositories for patching and kernel updates
- Experience automating system configuration and maintenance using Ansible and Satellite Server
- Experience with identity management systems, including LDAP and token-based authentication
Nice To Haves
- Experience supporting High Performance Computing (HPC) environments
- Experience working in classified or highly secure environments
- Familiarity with large-scale Linux infrastructure or supercomputing systems
- Experience improving system reliability and automation across enterprise environments
Responsibilities
- Provide Linux system administration expertise supporting HPC and enterprise environments
- Troubleshoot complex system and kernel-level issues using debugging tools and system logs
- Support High Performance Computing (HPC) environments, including system performance and stability
- Develop and maintain automation scripts to improve system management and operational efficiency
- Manage and maintain Linux patching and repository management using Satellite Server
- Build and maintain custom Linux kernels to address functionality or security requirements
- Automate system configuration and maintenance using tools such as Ansible
- Support and maintain identity and access management systems, including LDAP and token-based authentication
- Collaborate with engineering and infrastructure teams to ensure system security, availability, and performance
- Assist with diagnosing system outages, performance bottlenecks, and operational issues
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What This Job Offers
Job Type
Full-time
Career Level
Senior
