Classified Systems Administrator (TS/SCI) | Linux & Windows

STR; Arlington (VA); On-site; USD 105,000 - 125,000; Full time

Benefits offered by this job

Top Secret/SCI clearance

Job summary

STR is hiring a Systems Administrator to support Linux (Red Hat, Ubuntu) and Windows, with active Top Secret/SCI clearance, in Arlington, VA. The role emphasizes implementing, deploying, and maintaining secure IT infrastructure for defense research.

The candidate will work with senior admins, ISSOs, and researchers, handling NAS, AD, and network services, while ensuring compliance with DoD guidelines. On-site only in Arlington, with after-hours maintenance as required.

Qualifications

• Active Top Secret/SCI clearance required (U.S. citizenship)
• Linux administration on Red Hat/Ubuntu
• Windows OS administration in diverse environments
• DoD security guidelines and STIG/SCAP familiarity

Responsibilities

• Support senior administrators, ISSOs, and researchers
• Configure and maintain NAS storage, networking, firewall, and AD/GP
• Perform monitoring, analysis, and automation with PowerShell
• Provide daily systems maintenance and incident resolution
• Create and maintain SOPs for installations and configurations
• Maintain knowledge of DoD guidelines and organizational policies
• Support production and development environments
• Provide after-hours maintenance and patching when needed

Skills

Linux Administration

Windows Administration

Active TS/SCI clearance

Education

Bachelor’s degree + 5 years experience

Master’s degree + 3 years experience

PhD or equivalent experience

Tools

Red Hat

Ubuntu

MS Active Directory

PowerShell scripting

Job description

STR is hiring a Systems Administrator to support Linux (Red Hat, Ubuntu) and Windows, with active Top Secret/SCI clearance, in Arlington, VA. The role emphasizes implementing, deploying, and maintaining secure IT infrastructure for defense research.

The candidate will work with senior admins, ISSOs, and researchers, handling NAS, AD, and network services, while ensuring compliance with DoD guidelines. On-site only in Arlington, with after-hours maintenance as required.