Senior Linux Systems Admin for HPC (TS/SCI)

Reflexive Concepts, LLC; Bluffdale (UT); On-site; USD 85,000 - 130,000; Full time

Job summary

Reflexive Concepts is seeking a skilled System Administrator (Level 2) to support mission operations sustainment on Linux-based HPC systems.

The role focuses on monitoring, troubleshooting, and maintaining high-performance computing environments, with an on-call requirement and clearance as a condition of employment. Candidates should have DoD 8570 IAT Level II certification and TS/SCI with full-scope polygraph, and experience across RHEL/CentOS/Rocky/SLES/Ubuntu.

Qualifications

• Five years of system administration experience.
• Bachelor's degree or equivalent, total 10 years experience optional substitute.
• Linux administration on major distros and networking basics.
• BASH scripting; software compilation and install.
• DoD 8570 IAT Level II certification with verification code.
• Active TS/SCI clearance with full-scope polygraph within 7 years.
• On-call requirement.

Responsibilities

• Monitor Linux-based HPC systems for uptime and performance.
• Troubleshoot system and application issues across environments.
• Perform OS installs, configurations, and hardening tasks.
• Support on-call duties and incident response process.
• Coordinate with toolchains (Jira/Confluence) and HPC workflows.

Skills

Linux administration

Bash scripting

TCP/IP networking

System troubleshooting

Education

Bachelor's degree or higher

Tools

Jira

Confluence

Grafana

Prometheus

Nagios

Slurm

Git

Salt

Ansible

Job description

Reflexive Concepts is seeking a skilled System Administrator (Level 2) to support mission operations sustainment on Linux-based HPC systems.

The role focuses on monitoring, troubleshooting, and maintaining high-performance computing environments, with an on-call requirement and clearance as a condition of employment. Candidates should have DoD 8570 IAT Level II certification and TS/SCI with full-scope polygraph, and experience across RHEL/CentOS/Rocky/SLES/Ubuntu.