Senior System Administrator - TS/SCI with Polygraph

General Dynamics Information Technology

📍 Reston, Virginia, United States

Full time Computer Occupations Posted June 07, 2026

Job Description

Senior Systems Administrator 

Transform technology into opportunity as a Senior Systems Administrator with GDIT. A career in enterprise IT means connecting and enhancing the systems that matter most. At GDIT you’ll be at the forefront of innovation and play a meaningful part in improving how agencies operate. 

The job duties of the Sr. Systems Administrator are as follows:  

  • Plans, designs, and implements infrastructure changes and system upgrades.

  • Manages and troubleshoots multiple VMware environments.

  • Provides Windows Server and Linux administration, maintenance, and troubleshooting.

  • Creates STIG compliant images for Windows Desktop, Windows Server, and Linux OS.

  • Creates, tests, and deploys software packages using software deployment products such as SCCM, PDQ, etc.

  • Provides expert level support and mentoring for Mid and Junior Systems Administrator personnel.