Senior System Administrator - TS/SCI w/Polygraph

Public Trust: None

Requisition Type: Regular

Your Impact

Own your opportunity to serve as a critical component of our nation’s safety and security. Make an impact by using your expertise to protect our country from threats.

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.
• Develops and maintains installation and configuration procedures for system and software changes.
• Utilizes scripting to automate common tasks.
• Performs hardware maintenance/repair activities.
• Ensures proper planning and execution of major projects/maintenance activities.
• Provides advanced level administration and troubleshooting of Active Directory, GPO, DNS, DHCP, and Domain Controllers.  

Required Qualifications:

• Ability to write scripts using PowerShell and/or Bash.
• Experience managing VMware, Nutanix, and other types of enterprise level Virtual Infrastructures.
• Proficient in managing and troubleshooting Active Directory and Group Policy Object (GPO).
• At least 10 years of relevant experience.
• Security + Certified; Must presently be 8570 compliant (IAT Level 2 preferred)
• Bachelor of Arts/Bachelor of Science in a field applicable to this work
• US Citizenship Required
• TS/SCI with CI Poly

Desired Qualifications

• Linux OS (CentOS, RHEL) administration.
• Satellite server administration.
• Ansible playbook writing.
• Implementing STIGs.
• Experience supporting a software configuration management and development environment

GDIT IS YOUR PLACE:

• 401K with company match
• Comprehensive health and wellness packages
• Internal mobility team dedicated to helping you own your career
• Professional growth opportunities including paid education and certifications
• Cutting-edge technology you can learn from
• Rest and recharge with paid vacation and holidays

#GDITCareers

#WeAreGDIT

#MD_Alumni2026

#VA_2026Alumni

#JET 

Work Requirements

Years of Experience

9 + years of related experience

* may vary based on technical training, certification(s), or degree

Certification

CompTIA Security+ CE | CompTIA - CompTIA

Travel Required

None

Citizenship

U.S. Citizenship Required