Posted:
2/10/2026, 5:41:55 AM
Location(s):
Maryland, United States
Experience Level(s):
Senior
Field(s):
IT & Security ⋅ Software Engineering
Leidos is seeking a Senior Windows Systems Administrator (SA) to serve as the primary Windows SA and subject matter expert (SME) for our team. This role focuses on ownership of our Windows environment while supporting a mixed‑OS infrastructure.
Act as the lead and primary SME for all Windows Server systems.
Manage, maintain, and troubleshoot Windows-based servers and services.
Provide guidance and technical support to the team on Windows-related issues.
Collaborate with team members to ensure stable and secure system operations.
Perform basic administration and troubleshooting on Linux systems as needed.
Bachelor’s degree in a technical discipline from an accredited college or university and Fifteen (15) years experience as a SA in programs and contracts of similar scope, type, and complexity is required. Five (5) years of additional SA experience may be substituted for a bachelor’s degree.
Strong experience administering Windows Server environments.
Deep understanding of core Windows services and system management.
Working knowledge of Linux systems.
Solid troubleshooting and communication skills.
Certifications: An Information Assurance Technical (IAT) level II baseline certification as defined by DoD 8570.01-M is required
Security Clearance Requirement: Active TS/SCI with polygraph
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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.
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.
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.
Website: https://www.leidos.com/
Headquarter Location: Reston, Virginia, United States
Employee Count: 10001+
Year Founded: 1969
IPO Status: Public
Industries: Computer ⋅ Government ⋅ Information Services ⋅ Information Technology ⋅ National Security ⋅ Software