Senior Red Hat Linux Systems Admin — Top Secret Clearance

The One 23 Group; Arlington (VA); On-site; USD 110,000 - 150,000; Full time

Job summary

The One 23 Group in Arlington, VA is seeking a Senior Redhat Linux Systems Administrator to provide Tier II/III administration for RHEL and UNIX servers supporting JSSC Enterprise Services, primarily at the Pentagon.

The role requires an active Top Secret clearance, SIPRNet eligibility, 24/7 on-call rotation, and willingness to relocate to Site-R within 12 hours for COOP. You will manage patching, security compliance, backups, and documentation.

Qualifications

• Active Top Secret clearance with SIPRNet access.
• At least 10 years of IT experience delivering complex systems.
• Advanced UNIX/Linux (RHEL) administration.
• Current DoD IAT Level II certs or equivalents (e.g., Security+, CySA+, GSEC, etc.).
• Ability to work independently and in 24/7 on-call rotations.
• Ability to relocate to Site-R within 12 hours for COOP events.

Responsibilities

• Administer and maintain Red Hat Enterprise Linux and UNIX servers across production, test, and development environments.
• Perform account administration, OS maintenance, resource monitoring, log analysis, performance tuning, storage support, and troubleshooting.
• Engineer hardware and software for mission-critical environments and ensure system reliability.
• Test and deploy patches through approved change-control processes.
• Apply DISA STIGs and support vulnerability remediation and security compliance.
• Support backup/recovery coordination, DR, and continuity-of-operations requirements.
• Coordinate with government leads, system admins, database admins, and cybersecurity staff.
• Develop and maintain SOPs, runbooks, and operational documentation.

Skills

Top Secret clearance

SIPRNet access

On-call readiness

12x5 operations

Education

DoD IAT Level II certification

Red Hat Enterprise Linux certification

Job description

The One 23 Group in Arlington, VA is seeking a Senior Redhat Linux Systems Administrator to provide Tier II/III administration for RHEL and UNIX servers supporting JSSC Enterprise Services, primarily at the Pentagon.

The role requires an active Top Secret clearance, SIPRNet eligibility, 24/7 on-call rotation, and willingness to relocate to Site-R within 12 hours for COOP. You will manage patching, security compliance, backups, and documentation.