Senior System Administrator - TS/SCI Poly; Security Clearance
Listed on 2026-09-30
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IT/Tech
Cybersecurity, Systems Administrator
Leidos is seeking a Mid/Sr System Administrator to support a large, distributed network environment in a fast-paced, security-focused setting. The role emphasizes system administration, vulnerability management, and maintaining complex IT infrastructure across multiple domains.
The candidate will install applications, configure servers, and perform operational tasks, with a focus on security, uptime, and collaboration with developers, testers, and engineers.
For the Senior System Administrator - TS/SCI Poly (Security Clearance) position at Leidos, we are reviewing applications now.
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This posting is for the Senior System Administrator - TS/SCI Poly (Security Clearance) role at Leidos, based in MD, United States.
We are looking to fill the Senior System Administrator - TS/SCI Poly (Security Clearance) position at Leidos in MD, United States.
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