Windows Server Administrator - Night Shift

Koitecc Solutions; San Antonio (TX); On-site; USD 59,000 - 107,000; Full time

Job summary

Leidos in San Antonio, TX seeks a Windows Systems Administrator for a 3rd shift (9 PM–5 AM) to support a modern, secure web service platform. The role is 100% on-site with responsibilities spanning AD, DNS/DHCP, VMware, PowerShell, and more.

The position requires a Bachelor’s degree with 2+ years’ Windows server experience, active TS/SCI clearance, and DoD 8750 IAT Level II certification. Willingness to cover 24×7 shifts is essential.

Qualifications

• Bachelor's degree required; 2+ years Windows server experience.
• Active TS/SCI clearance required.
• DoD 8750 IAT Level II certification required (Security+ce).
• Willingness to work 24x7 shifts including nights/weekends/holidays.

Responsibilities

• Administer and maintain Windows Server environments across physical and virtual infrastructure.
• Manage Active Directory, DNS, DHCP, Group Policy, and Microsoft-based services.
• Perform server installation, configuration, upgrades, patching, and troubleshooting.
• Monitor server performance, availability, capacity, and health.
• Support virtualization platforms such as VMware.
• Implement and maintain server backup and disaster-recovery procedures.
• Automate routine tasks using PowerShell.

Skills

Windows Server admin

Active Directory

PowerShell scripting

Python scripting

Security clearance TS/SCI

DISA STIGs knowledge

Education

Bachelor's degree in a related field

DoD 8750 IAT Level II (e.g., Security+ce)

Tools

VMware

PowerShell

Job description

We are currently seeking a Windows Systems Administrator 3rd shift (9PM to 5AM) to join the Compartmented Enterprise Services Office (CESO) effort. This program is establishing a modern secure web service (SWS) operation as part of a state-of-the-art, highly automated platform capable of supporting a rapidly expanding customer population.

This position is based in San Antonio, TX and is 100% on-site.

Primary Responsibilities

• Administer and maintain Windows Server environments across physical and virtual infrastructure.
• Manage Active Directory, DNS, DHCP, Group Policy, and Microsoft-based infrastructure services.
• Perform server installation, configuration, upgrades, patching, and troubleshooting.
• Monitor server performance, availability, capacity, and system health.
• Manage user accounts, permissions, security groups, and access controls.
• Support virtualization platforms such as VMware.
• Implement and maintain server backup and disaster-recovery procedures.
• Troubleshoot operating-system, application, network, and server-related issues.
• Apply security updates, hardening standards, and vulnerability remediation.
• Maintain technical documentation, configuration records, and operational procedures.
• Participate in incident response, change management, and infrastructure projects.
• Automate routine administrative tasks using PowerShell where appropriate.
• Provide escalation-level support for Windows infrastructure issues.

Basic Qualifications

• Bachelor's degree and 2+ years of overall related experience with a Windows servers environment. Additional experience, education and training may be considered in lieu of degree.
• An active TS/SCI security clearance is required for this position.
• Currently possess DoD 8750 certification at least IAT level II, e.g Security+ce.
• Comfortable working 24×7 shifts, including nights, weekends, and holidays.
• Candidate may be asked to obtain CI Poly in future
• Experience with configuration, troubleshooting and maintaining VMware environments.
• Experience with PowerShell scripting and experience in other languages like Python.
• Experience with application of security settings and other commercial best practices such as DISA STIGS.
• Proficient with Active Directory, DNS, DHCP, Group Policy, and Microsoft-based infrastructure services.
• Experience with System (hardware) and application (software) installation and configuration.
• Application of security settings and other commercial best practices such as DISA STIGS.
• Strong troubleshooting and problem-solving skills.

Preferred Qualifications

• Prior experienced with DISA and DISA’s support to mission partners
• TS/SCI w/CI Poly Preferred
• Experience with AWS EC2, S3.
• Candidates with a thorough knowledge of networking principles to included TCP/IP a plus.
• Experience with a ticketing system such as BMC Remedy.
• Linux OS experience.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting:

October 2, 2026

Pay Range

Pay Range $59,150.00 - $106,925.00

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.