Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Windows System Administrator

Full-time

GCyber

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.

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.

Stay in Touch

For future job notifications please follow GCyber on LinkedIn.

Vacancy posted 14 days ago
Similar jobs that could be interesting for youBased on the Senior Windows System Administrator in Arlington, VA vacancy
  • $55 - $65 per hour

    Apex Systems is looking for a Windows Systems Administrator - Team Lead to support mission-critical systems in a classified DoD environment in Washington, DC. This role involves leading a team, maintaining secure systems, and providing advanced technical support. Candidates... 
    Senior
    Hourly pay

    Apex Systems

    Washington DC
    3 days ago
  • AHU Technologies Inc is seeking a skilled Network and Systems Administrator responsible for managing the organization's servers, network systems...  ...IT services. The role involves ensuring secure and reliable Windows Server performance, monitoring network infrastructure, and... 
    Senior

    AHU Technologies Inc

    Washington DC
    5 days ago
  • $185k - $265k

    PGTEK is seeking a Senior System Administrator in McLean, VA to support advanced infrastructure technologies. The role requires hands-on expertise in Windows systems, strong communication skills, and the ability to resolve complex technical issues. Candidates must hold... 
    Senior

    PGTEK

    Mc Lean, VA
    5 days ago
  •  ...Church, Virginia. This remote position requires expertise in Windows Administration, load balancing solutions, and managing RDBMS like MS SQL...  ...comprehensive benefits and values innovation and collaboration in a supportive team environment. #J-18808-Ljbffr Apex Systems
    Senior
    Remote job

    Apex Systems

    Falls Church, VA
    4 days ago
  • The Manufacturing Calibration Test Technician is responsible for calibrating, testing, and shipping Beckman Echo systems. This position reports to the Manufacturing Supervisor and is part of the Production Team located in San Jose, CA and will be an on-site role. In this... 
    Suggested
    Work experience placement

    TechDigital Group

    Washington DC
    1 day ago
  • $90k - $108k

    Reston Consulting Group is seeking a Systems Administrator (Windows) in Washington, DC, requiring an active Top-Secret clearance. This full-time role is onsite five days weekly, supporting government contracts with a salary range of $90,000 to $108,000. The ideal candidate... 
    Full time

    Reston Consulting Group

    Washington DC
    5 days ago
  • $85k - $125k

    HRB is looking for a mid-level Windows Systems Administrator in Washington, D.C. You will develop and support complex systems for the Naval Research Laboratory while enforcing DoD security standards. The ideal candidate will have 5-10 years of experience in Windows Systems... 

    HRB

    Washington DC
    2 days ago
  • # Windows System AdministratorApply**Job#: 3037715****Job Description:**We’re looking for a Windows Systems Administrator - Team Lead to support and engineer mission-critical systems within a classified DoD environment. This role combines hands-on technical work with team... 
    Hourly pay
    Contract work

    Apex Systems

    Washington DC
    3 days ago
  • $100k - $140k

     ...dynamic. We place emphasis on personal growth and learning new skills. We are currently seeking a talented Mid to Senior level Windows System Administrator Engineer to join our growing team. This person will be responsible for delivering top-quality results and taking... 
    Temporary work

    CloudShape Inc

    Washington DC
    2 days ago
  • We are seeking a Windows System Administrator to support the Infrastructure Management Monitoring Team’s enterprise SolarWinds environment. This...  ...mission-driven environment and can engage confidently with senior military and government leadership. Meaningful work and impact... 

    General Dynamics Information Technology

    Falls Church, VA
    2 days ago
  • $85k - $125k

     ...Position Description Support Naval Research Laboratory Space Systems Development Division (SSDD). The primary objective of the...  ..., and ground applications. We are seeking a mid-level Windows Systems Administrator with 5-10 years of experience supporting Department of Defense... 
    Temporary work

    HRB

    Washington DC
    3 days ago
  • Bailey Information Technology Consultants, LLC is seeking a System Administrator to manage IT infrastructure systems in Washington, DC. The ideal candidate will have over 5 years of IT experience, perform account management, and troubleshoot both virtual and physical environments... 
    Remote job

    Bailey Information Technology Consultants, LLC

    Washington DC
    3 days ago
  • General Dynamics Information Technology seeks a Windows System Administrator to support its Infrastructure Management Monitoring Team in Falls Church, VA. The role involves ensuring security and availability of Windows systems, administering servers, and providing technical... 
    Remote work

    General Dynamics Information Technology

    Falls Church, VA
    2 days ago
  •  ...Job Description Job Description Senior Windows Systems Administrator (TS/SCI Required) Location: On‐Site (U.S. Government Facility) Clearance: Active Top Secret Clearance with SCI (TS/SCI) — Mandatory Employment Type: Full‐Time About the Role... 
    Senior
    Full time

    Stable Growing In-Demand Technology Service Provider to Busi...

    Washington DC
    26 days ago
  • Leidos is seeking a skilled Senior System Administrator in Alexandria, VA, to support enterprise data and analytics programs across the Department of War. You will work with government partners to translate operational requirements into scalable solutions while enhancing... 
    Senior

    Leidos

    Alexandria, VA
    1 day ago
  • Technology Information Systems, LLC is looking for an IT System Administrator based in Washington, D.C. This role involves the design and implementation of server and network components, along with administration and support of client-facing systems. Qualified candidates... 

    Technology Information Systems, LLC

    Washington DC
    5 days ago
  •  ...record in technology consulting. Candidates should possess strong analytical skills and certifications such as Salesforce Advanced Administrator. This full-time, permanent position is targeted at US citizens and green card holders only, offering an excellent opportunity to... 
    Senior
    Permanent employment
    Full time

    Sonsoft Inc

    Washington DC
    2 days ago
  •  ...A leadership consulting firm based in Alexandria is looking for a Principal to lead long-term transformational engagements with senior executives. The role demands a proven record of managing large programs, strong client relationship skills, and the ability to mentor... 
    Senior

    McChrystal Group

    Alexandria, VA
    1 day ago
  • STI-TEC is seeking a Senior Systems Administrator to oversee database and systems administration across JDEIS applications in Washington, D.C. The role ensures stability and security for the Joint Doctrine Development Community's platforms. Candidates must possess a Bachelor... 
    Senior

    STI-TEC

    Washington DC
    18 hours ago
  • $100k - $110k

    A private university is seeking a Database Administrator to manage systems and procedures ensuring security, integrity, and performance of databases and applications. The role involves administering Oracle and SQL Server databases, maintaining ERP systems such as PeopleSoft... 
    Senior

    The Catholic University of America

    Washington DC
    2 days ago
  • $143k - $243k

    A leading healthcare organization is seeking a Senior Principal Actuary to provide actuarial direction and create innovative modeling concepts. This remote position involves collaborating with underwriters, leading data analyses, and influencing pricing strategies across... 
    Senior
    Remote work

    Prime Therapeutics

    Washington DC
    1 day ago
  •  ...is seeking a Full-Time Technical Support Specialist in Washington, DC. The role involves providing advanced technical support for systems, applications, and networks, troubleshooting issues, and maintaining IT infrastructure. Candidates should have an Associate's Degree... 
    Senior
    Full time

    Armada

    Washington DC
    5 days ago
  •  ...Systems Interoperability Tester, Senior Category: Architecture Main location: United States, Virginia, Arlington Position ID:J0925-2138 Employment Type: Full Time Position Description: CGI Federal has an exciting opportunity for... 
    Senior
    Full time
    Local area

    CGI

    Arlington, VA
    2 days ago
  • Smithsonian Institution seeks an Information Technology Specialist (Data Management) to serve as a senior database administrator for The Museum System (TMS). The role involves providing advanced database programming, system customization, and integration support, coordinating... 
    Senior

    Smithsonian Institution

    Washington DC
    18 hours ago
  • $170k - $210k

    Slalom is looking for a Technology Solutions Leader (Senior Principal) to join their DC-Cheasapeake Market. The role involves engaging with clients, leading technical deliveries, and driving business development efforts. The ideal candidate will have over 10 years of consulting... 
    Senior

    Slalom

    Washington DC
    1 day ago
  •  ...Description We are seeking an experienced Database Administrator to support the installation, configuration, maintenance, security, and migration...  ...Apply database patches, upgrades, and fixes to maintain system health and stability Install, configure, and support Oracle... 
    Senior

    SAIC

    Arlington, VA
    1 day ago
  •  ...Senior IT Specialist The Senior IT Specialist provides high level functional and IT analysis, design, development, integration, documentation...  ...knowledge of the related technical subject matter for effective system deployment. Primarily responsible for: Participates in all... 
    Senior

    Staffing the Universe

    Washington DC
    4 days ago
  • $120k - $128k

    Senior SQL Server Database Administrator Join to apply for the Senior SQL Server Database Administrator role at...  ...Database Mail and implement alert systems to provide proactive issue notification...  ...Always On Availability Groups, Windows Failover Clustering, and Database Mirroring... 
    Senior

    Bow Wave LLC

    Washington DC
    3 days ago
  •  ...are seeking a highly skilled Senior SQL Server DBA with 8+ years of hands‑on database administration experience, including 5+ years...  ...security across our SQL Server systems. A bachelor's degree in Computer...  ..., UAT, and PROD environments (Windows Server and cloud-hosted)... 
    Senior

    Bow Wave LLC

    Washington DC
    4 days ago
  • An established industry player seeks a motivated Associate Principal to join its dynamic Energy practice. This role offers an exciting opportunity to work closely with leading academics and industry experts, guiding clients through complex energy market challenges. You ...
    Senior

    Charles River Associates

    Washington DC
    4 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Windows System Administrator. Be the first to apply!