Tier 3 Systems Administrator
Location: San Antonio, TX
Clearance Required: Public Trust (ADP/IT-II); Tier 3 Investigation (NACLC)
Program Overview
The Defense Health Agency’s Domain and Directory Services Branch (DDSB) supports the global IT infrastructure that underpins medical readiness for the Army, Navy, and Air Force. This includes sustaining both on-premise and cloud-based environments serving over 200,000 users and 250,000 end-user devices across 250 sites worldwide. DDSB manages core identity, access, and directory services essential to mission-critical healthcare delivery within the Military Health System. Team members contribute to a broad range of IT operations and modernization efforts that directly impact service members, veterans, and their families. This is a high-impact environment supporting both peacetime healthcare and wartime readiness across the DoD medical enterprise.
Summary
The Tier 3 Systems Administrator provides senior-level enterprise administration and engineering support across hybrid cloud and on-premise environments within the Military Health System. This role is responsible for maintaining, optimizing, and troubleshooting enterprise-scale services, including Active Directory (AD), Microsoft Entra ID (Azure AD), enterprise monitoring systems, and encrypted data platforms. The administrator ensures continuity of service, compliance, and security for critical directory, authentication, and communication tools throughout the enterprise.
Key Responsibilities
Preferred Tools & Technologies
Education & Certification Requirements (per DoD 8140 Qualification Matrices)
1) Microsoft Certified: Azure Administrator Associate or Windows Server Hybrid Administrator Associate
2) Any of the following...