Windows Server Administrator — 3rd Shift (TS/SCI)

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

Job summary

Leidos in San Antonio, TX is seeking a Windows Systems Administrator for 3rd shift (9 PM to 5 AM) to support CESO expansion. You will administer Windows Server environments, manage Active Directory, DNS, DHCP, and Group Policy across physical and virtual infrastructure, and contribute to a secure, highly automated platform.

The role requires a bachelor's degree with 2+ years in Windows environments, TS/SCI clearance, DoD 8750 IAT II certification, and willingness to work 24/7 shifts.

Qualifications

• Bachelor's degree with 2+ years in Windows server environments.
• Active TS/SCI clearance required.
• DoD 8750 IAT II certification (e.g., Security+ce).
• Willing to work 24x7 shifts, nights/weekends/holidays.
• VMware experience; PowerShell scripting; Python experience.
• Experience with AD, DNS, DHCP, Group Policy, and MS infrastructure.
• Security hardening with DISA STIGs and incident response knowledge.
• Strong troubleshooting and documentation skills.

Responsibilities

• Administer and maintain Windows Server environments across physical and virtual infra.
• Manage Active Directory, DNS, DHCP, Group Policy, and MS services.
• Install, configure, upgrades, patching, and troubleshooting servers.
• Monitor server performance, availability, capacity, and health.
• Manage user accounts, permissions, security groups, and access controls.
• Support VMware virtualization environments.
• Implement and maintain backup and disaster-recovery procedures.
• Troubleshoot OS, application, network, and server issues.
• Apply security updates and hardening; maintain security records.
• Maintain technical docs, configuration records, and procedures.
• Participate in incident response, change management, and infra projects.
• Automate routine tasks with PowerShell; provide escalation support.

Skills

PowerShell

VMware

Active Directory

Group Policy

DNS

DHCP

Troubleshooting

Python

Security best practices

Education

TS/SCI clearance

DoD 8750 IAT II certification

Tools

AWS EC2

Job description

Leidos in San Antonio, TX is seeking a Windows Systems Administrator for 3rd shift (9 PM to 5 AM) to support CESO expansion. You will administer Windows Server environments, manage Active Directory, DNS, DHCP, and Group Policy across physical and virtual infrastructure, and contribute to a secure, highly automated platform.

The role requires a bachelor's degree with 2+ years in Windows environments, TS/SCI clearance, DoD 8750 IAT II certification, and willingness to work 24/7 shifts.