Windows System Administrator

Job description

Windows System Administrator Location

Suitland, MD Clearance: TS/SCI We are seeking an experienced Windows System Administrator in Suitland, MD to support enterprise Windows environments, system upgrades, vulnerability management, and secure configuration in a mission‑critical setting.

Key Responsibilities

Build and upgrade Windows servers and workstations. Run and analyze ACAS vulnerability scans. Manage GPOs, Active Directory, and domain services. Support SCCM deployments, imaging, and compliance. Perform system patching and STIG hardening. Provide basic SQL Server configuration and troubleshooting. Maintain system documentation and support RMF/A&A activities.

Basic Qualifications

Bachelor’s degree with 8+ years of experience or a Master’s degree with 6+ years of experience. Additional experience may be considered in lieu of a degree. Active TS/SCI in DISS and required program access. Active DoD 8570/8140 IAT II or III certification (Security+, CASP, CISSP, etc.). Windows system administration in enterprise environments. ACAS scanning and vulnerability remediation. SCCM deployment and compliance reporting.

Patch management and STIG implementation. GPO management and AD administration. Strong troubleshooting and communication skills.

Preferred Qualifications

NetApp storage management experience. VMware experience. PowerShell scripting. Familiarity with RMF, STIG Viewer, and eMASS. NITESONI DABAOPP1 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 16, 2026 For U.S.

Positions

While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range

Pay Range $92,300.00 - $166,850.00 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.