Senior Windows System Administrator Security Clearance

Position: Senior Windows System Administrator with Security Clearance
GCyber is seeking a Senior Windows System Administrator, to help support our government customer in Arlington, VA. The role focuses on ownership of our Windows environment while supporting a mixed-OS infrastructure. As the Senior Windows System Administrator, you will:
* 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.

Minimum Qualifications and

Experience:

* Active Top Secret/SCI clearance
* Bachelor's degree in a related discipline with 8+years of relevant experience
* IAT II Certification (i.e., Security+, CCNA-Security, CySA+, CND, GICSP, GSEC, SSCP)
* Strong experience administering Windows Server environments
* Deep understanding of core Windows services and system management
* Working knowledge of Linux systems.