System Administrator Enterprise Jobs

Job Title

Enterprise System Administrator - Intermediate (Support Services)

Location

San Antonio, TX

Education

BS degree in Information Technology, Cybersecurity, Data Science, Information Systems, or Computer Science or Military Training or Cloud+ or GICSP or SSCP or Security+ or GSEC

Certification

Microsoft Certified: Azure Administrator Associate or Microsoft Certified: Windows Server Hybrid Administrator Associate

Position Description

The Tier 3 Systems Administrator delivers advanced sustainment and troubleshooting of enterprise systems for the DHA Domain and Directory Services Branch (DDSB). This role provides expert support across on-premises and MED365 cloud environments, ensuring the availability, reliability, and security of enterprise IT services.

• Administer and maintain enterprise services including mJAD, Exchange Online, encryption services, eDiscovery, and MED365 tenant operations.
• Develop, validate, and maintain Disaster Recovery (DR) procedures, ensuring DHA enterprise systems remain resilient and recoverable.
• Enforce and validate data encryption on desktops, laptops, and end-user devices, ensuring compliance with DoD/DHA directives.
• Customize and manage enterprise monitoring rules, alerts, and reports, providing actionable performance and availability insights.
• Implement and sustain Public Key Infrastructure (PKI) and Public Key Encryption (PKE) solutions in compliance with DoDI 8520.02.
• Produce After Action Reports (AARs), Situation Reports (SITREPs), and Executive Summaries (EXSUMs) for system outages, interruptions, and remediation efforts.
• Collaborate with Tier 2 administrators and enterprise engineering teams to ensure escalation paths, knowledge transfer, and continual improvement of IT services.
• Develops: DR procedures and test results; Encryption validation and compliance reports; Enterprise monitoring and performance reports; PKI/PKE configuration and sustainment documentation; SITREPs, AARs, and outage resolution reports.

Tier 3 Systems Administrators play a critical role in maintaining the security, resilience, and operational continuity of DHA’s enterprise systems. By driving advanced monitoring, encryption, and disaster recovery capabilities, this position safeguards mission-essential IT services that directly support healthcare delivery across the Military Health System.