Senior Windows SysAdmin - TS/SCI Eligible | 75% Remote

Leidos; United States; Hybrid; USD 116,000 - 210,000; Full time

Job summary

Leidos is seeking a Senior Windows System Administrator to join our high-performing team. The role requires a minimum Secret clearance to start, with eligibility for TS/SCI, and involves hybrid work with travel to Warner Robins AFB in GA.

The candidate will monitor and administer a mixed Windows/Linux environment, lead design and implementation, and drive security compliance across the enterprise IT infrastructure.

Qualifications

• Bachelor's degree in IT, Computer Science, Engineering, or a related field.
• 7+ years of Windows systems administration experience, including senior/lead role.
• 5+ years with core Windows services (AD, DNS, GP).
• Active Top Secret/SCI clearance or ability to obtain TS/SCI.
• Experience with Hyper-V, virtualization, clustering, storage, Windows Server 2022/2025.

Responsibilities

• Monitor and administer systems, applications, and processes to identify and resolve issues.
• Support servers, security management, and performance optimization in a Windows/Linux environment.
• Lead design, implementation, maintenance, and support of enterprise IT infra.
• Manage AD, DNS, GP, NPS, and PKI; oversee backups and disaster recovery.
• Lead troubleshooting, vulnerability remediation, and RMF/DoD security efforts.

Skills

Windows administration

Active Directory

DNS

Group Policy

PowerShell

Hyper-V

VMs

Security

Education

Bachelor's degree in IT / Computer Science / Engineering

Tools

Windows Server

Hyper-V

NPS / PKI

RMF / DoD 8140

Job description

Leidos is seeking a Senior Windows System Administrator to join our high-performing team. The role requires a minimum Secret clearance to start, with eligibility for TS/SCI, and involves hybrid work with travel to Warner Robins AFB in GA.

The candidate will monitor and administer a mixed Windows/Linux environment, lead design and implementation, and drive security compliance across the enterprise IT infrastructure.