Overview

Senior Windows Systems Administrator
LOCATION: Columbia, MD (Onsite)
JOB STATUS: Full-time
CLEARANCE: Active Top Secret / TS/SCI (Required)
TRAVEL: Less than 10%
SALARY RANGE: $145k - $165k
Astrion has an exciting opportunity for a highly experienced Senior Windows Administrator to build, secure, and sustain the Windows Server estate, the Windows 11 workstation fleet, and the Active Directory and Windows network services that run across three or more isolated classified networks supporting Department of Defense/Department of War (DoD/DoW) environments in Columbia, MD. The idóneo candidate brings deep Windows Server and Active Directory expertise, extensive experience operating inside closed and air-gapped classified enclaves, and a proven record of building and maintaining systems in compliance with Risk Management Framework (RMF), DoD STIG, and Comply-to-Connect (C2C) requirements. This position requires Monday through Friday on-site work at our facility in Columbia, MD.
REQUIRED QUALIFICATIONS / SKILLS
Active TS/SCI security clearance (required)




Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience)
8+ years of Windows systems and network administration experience within DoD/DoW or classified environments
Deep expertise in:
Windows Server administration (2016 through 2022): installation, patching, performance tuning, roles and features, storage, and networking
Active Directory Domain Services: Group Policy, DNS, DHCP, DFS, ADCS, sites and replication, and trusts
Scripting and automation (PowerShell and desired-state configuration)
Windows endpoint management (Microsoft Endpoint Configuration Manager, imaging, Group Policy)
End-user support on Classified Windows 11 and Windows Server supporting Operating System, supported applications, and hardware issues
Demonstrated experience implementing and maintaining DoD STIG compliance on Windows Server and workstations
Experience with offline and air-gapped patch

📌 Sr. Windows Systems Administrator (Colombia)
🏢 Astrion
📍 Colombia