Tier 2 Systems Administrator – Continuous Operations Support

Location: San Antonio, TX

Clearance Required: Public Trust (ADP/IT-II); Tier 3 Investigation (NACLC)

Program Overview

This position supports the Defense Health Agency’s (DHA) Domain and Directory Services Branch (DDSB), which provides global enterprise IT infrastructure across the Military Health System (MHS). The Tier 2 Systems Administrator will directly contribute to 24x7 operations supporting mission-critical healthcare systems and infrastructure at over 250 global sites. Team members play a vital role in ensuring system availability, rapid issue resolution, and secure IT operations that directly affect service members, veterans, and their families.

Summary

The Tier 2 Systems Administrator supports continuous enterprise operations and escalation-based troubleshooting for on-premise and MED365 Cloud environments. This role is responsible for Tier 2-level server and systems maintenance, Active Directory and Azure administration, patching and configuration management, cloud resource oversight, and enterprise monitoring. The administrator will collaborate with Tier 1 and Tier 3 teams to maintain system availability and security across the DHA's enterprise infrastructure.

Key Responsibilities

• Provide 24x7 operational support and maintenance for enterprise infrastructure, including servers, firmware, software, and MED365 tenant environments.
• Troubleshoot and resolve issues involving server patches, software conflicts, configurations, and maintenance windows.
• Use DoD Information Assurance tools to validate patch and security control compliance.
• Manage Active Directory user accounts: create, modify, recover, restore AD objects, and administer group policies.
• Perform Azure AD user and access management, including monitoring cloud resource usage and permissions.
• Support mobile devices and end-user computing issues, including reset/configuration and Device Approval Requests (DAR).
• Conduct GPO-related troubleshooting, add security groups, and monitor Group Policy Object (GPO) application.
• Administer enterprise systems and perform data recovery, password management, and machine unlock operations.
• Escalate unresolved issues to Tier 3 and manage communication for de-escalation back to MTF or Tier 1.
• Monitor infrastructure using SCOM, Quest Suite, and related monitoring tools; identify and respond to anomalies.
• Produce Unscheduled Downtime Reports (UDR), SITREPs, After Action Reports (AAR), and related service interruption documentation.
• Administer eDiscovery operations within MED365, including data collection, preservation, processing, and purging for litigation, security incidents, and audits.
• Ensure compliance with DoD 8140 Core and Additional KSATs as applicable to the role.

Preferred Tools & Technologies

• Microsoft Active Directory, Azure AD, Group Policy Management
• Microsoft Endpoint Configuration Manager (MECM/SCCM), SCOM
• Quest Tool Suite
• PowerShell, Microsoft 365 (MED365), Windows Server
• eDiscovery and litigation support platforms

Education/Certification Requirements Education & Certification (per DoD 8140 Qualification Matrices)

1) Microsoft 365 Certified: Fundamentals or Microsoft Certified: Azure Fundamentals

2) Any of the following...

• Academic Education: Bachelor’s degree in information technology, Cybersecurity, or a related discipline.
• OR Baseline: A+, or CND, or Network+, or GLSC
• OR DoD/Military Training: E3AQR3D032 02AA or E3AQR3D032 00BB or C-150-2012 or C-150-2011 or M09CVQ1 or F07DZZ1 or A-202-2100 (now A-150-1251) or A-150-1200 or A-150-1201 or A-102-5900 or A-531-0767