Windows System Administrator

Location: Suitland, MD

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.

• 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.

• 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.

• Net App storage management experience.
• VMware experience.
• Power Shell scripting.
• Familiarity with RMF, STIG Viewer, and eMASS.

Pay Range $92,300.00 - $

The Leidos pay range for this job level is a general guideline onlyand 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.

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

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

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.