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Windows System Administrator with Security Clearance

TEKsystems c/o Allegis GroupPentagon, DC🇺🇸United StatesPosted Oct 19, 2026

Quick Overview

Seniority
Mid Senior
Work mode
On Site
Location
Pentagon, DC, United States
Posted
Yesterday
Active DirectoryDNSPowerShellVMware

Job Description

Title: • Windows System Administrator Location

  • Pentagon, D.C. (ON-SITE) Clearance Required:
  • TS/SCI Certification Required:
  • Sec+ (or IAT II equivalent) Job Description:
We are seeking an experienced Windows Systems Administrator to provide systems administration support for systems within a classified enterprise environment. This role supports Tier 2 and Tier 3 troubleshooting, operating system lifecycle maintenance, and change management activities. The ideal candidate is a strong Windows administrator with experience supporting secure, enterprise-level environments. Requirements
  • Provide Tier 3 support for in-house developed systems and site-unique enhancements. • Support maintenance of current and future versions of supported IT systems. • Maintain server operating systems at required versions. • Maintain COTS, GOTS, and Open-Source software at required versions. • Perform installation, configuration, administration, and troubleshooting of supported systems. • Support incident, change, and configuration management processes in accordance with lifecycle support requirements. • Administer Active Directory user and group management functions. • Support VMware virtual machine administration and Virtual Desktop environments. • Provide support for DNS, DHCP, backup and restore operations, SAN storage fundamentals, and desktop imaging tools. • Assist with PowerShell scripting and automation efforts as needed. • This position requires an active DoD Clearance (Secret, Top Secret, Top Secret/SCI) or the ability to be obtain an (Interim Secret, Interim Top Secret)
  • Because an active or interim DoD clearance is required, U.S. Citizenship is required o Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms.  If eligible, the benefits available for this temporary role may include the following:
 Medical, dental & vision
 Critical Illness, Accident, and Hospital
 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available
 Life Insurance (Voluntary Life & AD&D for the employee and dependents)
 Short and long-term disability
 Health Spending Account (HSA)
 Transportation benefits
 Employee Assistance Program
 Time Off/Leave (PTO, Vacation or Sick Leave)

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