Senior Windows System Administrator
About The Position
GCyber is seeking a Senior Windows System Administrator to support a government customer in Arlington, VA. This role focuses on ownership of the Windows environment while also supporting a mixed-OS infrastructure. The Senior Windows System Administrator 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. The position involves designing, architecting, implementing, and sustaining enterprise Windows infrastructure, owning the health, performance, and availability of Windows systems through proactive monitoring and trend analysis, and leading complex troubleshooting and incident resolution efforts with deep root cause analysis. Additionally, the role requires establishing and enforcing enterprise standards, baselines, and hardening guidelines, providing technical leadership and mentorship to system administrators and engineers, and leading system lifecycle activities such as patching, upgrades, migrations, and modernization. Cross-platform support, including basic Linux system administration and coordination with Linux SMEs, is also a component of this role.
Requirements
- 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.
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.
Benefits
- 26 Days of Paid Leave + Annual PTO Increase
- An extra day of paid leave for every year of employment with GCyber
- Paid Parental Leave
- Additional Leave Allowances for Military Duty, Jury Duty, and Bereavement Leave
- 401(k) Matching
- 100% Company-funded Disability Insurance
- 90% Company-Funded Health, Dental, and Vision Insurance, with contributions to insurance benefits for spouses, children, and family members
- Training and Professional Development Plans
- Commuter Benefits Plan
- Parking and Transportation Allowance
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What This Job Offers
Job Type
Full-time
Career Level
Senior
