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System Administrator Security Clearance

Job in San Antonio, Bexar County, Texas, 78201, USA
Listing for: Anonymous Employer
Full Time position
Listed on 2026-09-02
Job specializations:
  • IT/Tech
    Systems Administrator, Windows Server, Cybersecurity, IT Infrastructure
Salary/Wage Range or Industry Benchmark: 90000 - 130000 USD Yearly USD 90000.00 130000.00 YEAR
Job Description & How to Apply Below
Position: System Administrator with Security Clearance
Windows Systems Administrator III

Location:

JBSA
Clearance:
Active TS/SCI or TS/SCI Eligible
Responsibilities
• Install, configure, test, tune, maintain, harden, upgrade, patch, and support physical and virtual Microsoft Windows Server environments across classified and unclassified networks.
• Design, implement, document, and maintain enterprise Windows Server infrastructure and supporting utility programs and monitoring tools.
• Administer and support core Microsoft infrastructure services including: ○ Active Directory (AD), DNS, DHCP, Microsoft Endpoint Configuration Manager (MECM/SCCM), Windows Server Update Services (WSUS)
• Monitor system performance, analyze hardware and software requirements, and recommend improvements to increase system efficiency, reliability, and availability.
• Create and manage capacity planning, utilization, and trending reports for enterprise systems.
• Perform day-to-day troubleshooting, maintenance, and support of Windows Server operating systems and associated infrastructure.
• Conduct annual DISA STIG compliance reviews and remediation activities on Red Hat Enterprise Linux (RHEL) servers and installed software.
• Support cybersecurity, vulnerability management, patch management, and system hardening initiatives in accordance with DoD and organizational security requirements.
• Maintain accurate technical documentation, system configurations, diagrams, and operational procedures.
• Coordinate with Information Technology Equipment Custodians (ITECs) and Property Custodians (PCs) by documenting accountable equipment moves within required timelines.
• Ensure proper cable management practices by neatly bundling and concealing system and peripheral cabling during installations and maintenance activities.
Requirements
• Active TS/SCI clearance or ability to obtain TS/SCI.
• 7+ years of experience installing, configuring, administering, troubleshooting, and maintaining Microsoft Windows Server environments.
• Experience designing, implementing, and supporting enterprise Windows infrastructure services including Active Directory, DNS, DHCP, MECM/SCCM, WSUS.
• Experience supporting both physical and virtualized server environments within secure DoD or federal enterprise networks.
• Experience with Windows Server hardening, patching, vulnerability remediation, and security compliance requirements.
• Experience performing DISA STIG compliance reviews and remediation activities.
• Strong understanding of system administration, performance monitoring, capacity planning, and enterprise infrastructure operations.
• IAT level II certification
• Microsoft Computing Certification Required (at least one of the following); ○ Microsoft 365 Certified:
Endpoint Administrator Associate ○ Microsoft Certified:
Information Security Administrator Associate ○ Microsoft 365 Certified:
Enterprise Administrator Expert ○ Microsoft 365 Certified:
Administrator Expert ○ Microsoft Certified:
Identity and Access Administrator Associate ○ Microsoft Certified:
Windows Server Hybrid Administrator Associate
Compensation • $90,000-$130,000, commensurate on experience.
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