Senior Windows Systems Administrator — Classified Networks (TS/SCI)

Astrion; Columbia (MD); On-site; USD 145,000 - 165,000; Full time

Job summary

Astrion is seeking a Senior Windows Systems Administrator in Columbia, MD to build, secure, and sustain the Windows Server estate and AD services across multiple classified networks. The role requires on-site work Monday through Friday and a TS/SCI clearance.

The candidate will manage Windows Server 2016–2022, Windows 11 workstations, and RMF-compliant configurations within air-gapped enclaves, coordinating with cyber, network, and mission stakeholders.

Qualifications

• Active TS/SCI security clearance required.
• Bachelor's degree in CS/IT or related field (or equivalent experience).
• 8+ years of Windows systems and network administration in DoD/DoW or classified environments.
• Deep Windows Server administration (2016–2022) and AD DS expertise.
• Scripting and automation with PowerShell.

Responsibilities

• Administer, patch, and sustain Windows Server and Windows 11 workstations across three or more isolated classified networks.
• Provide end-user support for classified Windows Server and Windows 11 workstations; troubleshoot issues.
• Administer Active Directory Domain Services per enclave: GPO, DNS, DHCP, DFS, ADCS, sites and replication.
• Build, harden, baseline Windows systems to DoD STIGs; remediate findings and drift.
• Manage workstation fleet with MECM, image deployment, app packaging, and GPO.

Skills

Windows Server Admin

Active Directory

PowerShell

RMF/STIG

Air-gap patching

Education

Bachelor's degree in CS/IT or related field

Tools

MECM

WSUS

Job description

Astrion is seeking a Senior Windows Systems Administrator in Columbia, MD to build, secure, and sustain the Windows Server estate and AD services across multiple classified networks. The role requires on-site work Monday through Friday and a TS/SCI clearance.

The candidate will manage Windows Server 2016–2022, Windows 11 workstations, and RMF-compliant configurations within air-gapped enclaves, coordinating with cyber, network, and mission stakeholders.