Windows Server Administrator - Night Shift

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

Job summary

Leidos LLC in San Antonio, TX is seeking a Windows Systems Administrator for 3rd shift (9 PM–5 AM) to support the CESO program, migrating to a high-security cloud environment.

The role focuses on administering Windows Server, AD, DNS, DHCP, GPO, and VMware, with emphasis on security, disaster recovery, and routine automation via PowerShell.

On-site requirement and active TS/SCI clearance are stated; extensive experience with security standards and documentation is expected.

Qualifications

• Bachelor's degree in IT or related field.
• Active TS/SCI clearance required; CI Poly may be required in future.
• Experience with Windows Server, AD, DNS, DHCP, GPO.

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.
• Manage user accounts, permissions, security groups, and access controls.
• Support virtualization platforms such as VMware.
• Implement and maintain backup and disaster-recovery procedures.

Skills

Windows Server

Active Directory

PowerShell scripting

Docker/Kubernetes?

Education

Bachelor's degree

DoD 8750 IAT Level II (Security+ce)

Tools

VMware

BMC Remedy

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.

To become part of the Leidos team that is assisting CESO as they migrate to a high security cloud environment by providing network and communication services, monitoring services, and system administration.

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.

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.

Pay Range: Pay Range $59,150.00 - $106,925.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement.

More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

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.

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 $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.