System Administrator III

Job Title

Reflexive Concepts is seeking a skilled System Administrator (Level 3) to join our growing team!

Job Overview

Reflexive Concepts is seeking a skilled System Administrator to support mission operations sustainment — monitoring, troubleshooting, and maintaining Linux-based high-performance computing systems on a high-impact national security mission.

Qualifications

• Ten (10) years of system administration experience
• Bachelor's Degree or higher in a related technical field
• An additional five (5) years of system administration experience may be substituted for the degree, for a total of Fifteen (15) years

Required

• Linux administration on RHEL, CentOS, Rocky, SLES, or Ubuntu
• OS install, file system configuration, and TCP/IP networking
• Operating system and application troubleshooting
• BASH scripting; software compilation and install
• Active TS/SCI clearance with full-scope polygraph (most recent poly within 7 years)

Desired Skills

• Understanding of HPC architecture and high-speed networks (InfiniBand, Slingshot)
• Familiarity with Jira, Confluence, Grafana, Prometheus, Nagios, Slurm, git, Salt, and Ansible
• Strong troubleshooting skills — comfort with the reality that no two systems are exactly alike