Senior Windows Systems Architect & SME

Leidos; Arlington (VA); On-site; USD 116,000 - 210,000; Full time

Job summary

Leidos is seeking a Senior Windows Systems Administrator (SA) to own the Windows environment within a mixed OS infrastructure. This role leads strategy, architecture, and operational excellence for enterprise Windows systems while coordinating with Linux SMEs for cross‑platform support.

The candidate should have 8+ years of relevant experience, Security+ or equivalent DoD 8570 IAT II certification, and an active TS/SCI clearance. Expect a challenging, mission‑critical environment.

Qualifications

• Bachelor’s degree in a related discipline with 8+ years of prior relevant experience.
• Security+ Certification or other DOD 8570 IAT Level II Certification
• Active TS and SCI eligibility
• 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.

Responsibilities

• Serve as the senior lead and primary Subject Matter Expert (SME) for all Windows Server environments, driving technical strategy, architecture decisions, and operational excellence.
• Design, architect, implement, and sustain enterprise Windows infrastructure.
• Own the health, performance, and availability of Windows systems; proactively monitor, analyze trends, and implement improvements to prevent issues before they impact operations.
• Lead complex troubleshooting and incident resolution efforts, conducting deep root cause analysis and implementing permanent corrective actions across systems and services.
• Establish and enforce enterprise standards, baselines, and hardening guidelines in alignment with security frameworks and compliance requirements.
• Provide technical leadership and mentorship to system administrators and engineers; guide best practices and elevate team capabilities across Windows technologies.
• Lead planning and execution of system lifecycle activities, including patching, upgrades, migrations, and modernization initiatives.
• Provide cross‑platform support by performing basic Linux system administration and coordinating with Linux SMEs for complex issues.

Skills

Windows Server

Linux

Troubleshooting

Security+

Education

Bachelor's degree in related discipline

Master's degree

Job description

Leidos is seeking a Senior Windows Systems Administrator (SA) to own the Windows environment within a mixed OS infrastructure. This role leads strategy, architecture, and operational excellence for enterprise Windows systems while coordinating with Linux SMEs for cross‑platform support.

The candidate should have 8+ years of relevant experience, Security+ or equivalent DoD 8570 IAT II certification, and an active TS/SCI clearance. Expect a challenging, mission‑critical environment.