reflexiveconcepts.catsone.com
System Administrator III
Monitors, troubleshoots, and maintains Linux-based high-performance computing systems supporting a national security mission. Day-to-day work spans OS installs, file systems, TCP/IP networking, BASH scripting, and on-call support on RHEL/CentOS/Rocky/SLES/Ubuntu, with an active TS/SCI clearance and full-scope polygraph required.
- Compensation
- Not disclosed
- Location
- Annapolis Junction, MD
- Work setup
- Not specified
- Seniority
- Not specified
- Employment
- Not specified
- Experience
- 7+ years
- Category
- Devops
- Posted
Skills
Must have
- Ten (10) years of system administration experience
- Bachelor's Degree or higher in a related technical field, or an additional 5 years of sysadmin experience (15 years total) in lieu of degree
- 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
- DoD 8570 IAT Level II certification (with verification code)
- Active TS/SCI clearance with full-scope polygraph (most recent poly within 7 years)
- Ability to meet on-call requirement
Nice to have
- 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 across non-uniform systems
Full description
Reflexive Concepts is seeking a skilled System Administrator (Level 3) to join our growing team!
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
- DoD 8570 IAT Level II certification (with verification code)
- Active TS/SCI clearance with full-scope polygraph (most recent poly within 7 years)
- This position carries an on-call requirement.
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