Senior Windows System Administrator

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. 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. 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. Our Benefits GCyber is committed to the well-being and development of every employee. Our benefits are designed to support your personal and professional goals, from health and wellness programs to retirement savings and career development opportunities. Highlights include: 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 Equal Opportunity Employer GCyber is an Equal Opportunity Employer. This means you don't have to worry about whether your application process will be fair. We consider all applicants without regard to race, color, religion, age, ancestry, ethnicity, gender, gender identity, gender expression, sexual orientation, veteran status, or disability. #J-18808-Ljbffr