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Information Technology 🏢 Full Time ⭐️ Verified

Senior IT Systems Administrator (Government & Defense)

San Antonio Federal Systems
San Antonio
Estimated Salary
USD 85.000 – USD 115.000
Live Update
15 Juli 2026
Deadline
15 Jul 2027

Job Description

We are seeking a highly skilled and detail-oriented Senior IT Systems Administrator to join our dynamic team supporting critical government infrastructure in San Antonio, TX. In this role, you will be instrumental in maintaining the stability, security, and efficiency of our federal client's IT environment. If you are looking for a stable career with excellent benefits, competitive pay, and the opportunity to make a tangible impact on national security systems, we encourage you to apply.

Why Join Us?

  • Stable Employment: Long-term contracts with major government agencies.
  • Comprehensive Benefits: Health, dental, vision, and 401(k) matching.
  • Paid Time Off: Generous vacation, sick leave, and holidays.
  • Professional Growth: Continuous training and certification reimbursement.

Key Responsibilities:

  • Manage and administer Windows Server environments, including Active Directory and Group Policy.
  • Configure and troubleshoot network infrastructure, ensuring high availability and security.
  • Implement and monitor cybersecurity measures, including patch management and vulnerability assessments.
  • Provide Level 3 technical support to government staff and resolve complex system issues.
  • Collaborate with cross-functional teams to plan and execute IT upgrades and migrations.
  • Document all system configurations, changes, and incident reports in compliance with federal standards.

Qualifications:

  • Bachelor’s degree in Information Technology, Computer Science, or related field (or equivalent experience).
  • 5+ years of experience in systems administration within a government or defense contracting environment.
  • Active Secret or Top Secret clearance (or the ability to obtain one).
  • Proficiency with Microsoft Server 2016/2019/2022 and Active Directory.
  • Strong knowledge of TCP/IP networking, VPNs, and firewalls.
  • Experience with cloud technologies (AWS/Azure) and virtualization (VMware/Hyper-V).
  • Excellent problem-solving skills and the ability to work in a fast-paced, mission-critical environment.

Responsibilities

  • Manage and administer Windows Server environments, including Active Directory and Group Policy.
  • Configure and troubleshoot network infrastructure, ensuring high availability and security.
  • Implement and monitor cybersecurity measures, including patch management and vulnerability assessments.
  • Provide Level 3 technical support to government staff and resolve complex system issues.
  • Collaborate with cross-functional teams to plan and execute IT upgrades and migrations.
  • Document all system configurations, changes, and incident reports in compliance with federal standards.

Qualifications

  • Bachelor’s degree in Information Technology, Computer Science, or related field (or equivalent experience).
  • 5+ years of experience in systems administration within a government or defense contracting environment.
  • Active Secret or Top Secret clearance (or the ability to obtain one).
  • Proficiency with Microsoft Server 2016/2019/2022 and Active Directory.
  • Strong knowledge of TCP/IP networking, VPNs, and firewalls.
  • Experience with cloud technologies (AWS/Azure) and virtualization (VMware/Hyper-V).
  • Excellent problem-solving skills and the ability to work in a fast-paced, mission-critical environment.

Required Skills

System Administration Active Directory Cybersecurity Windows Server Networking AWS VMware IT Support

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