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Infographic showing various Windows Server Engineer job openings at Pgtek in the United States as of August 2026, with employment types broken down into 100% Full Time. Highlights an 98% Physical, and 2% Remote job distribution.

Windows Systems Administrator - McLean, VA - TS/SCI

PGTEK

Mclean, VA • On-site

$185K - $265K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 11 days ago

Job description

Senior System Administrator (Windows)
Location: McLean, VA (transitioning to Chantilly, VA)
Clearance Required: Active TS/SCI with CI Polygraph
Salary Range: $185,000 - $265,000
Travel: Up to 20%
Overview
We are seeking a highly skilled Senior System Administrator to join a dynamic infrastructure team supporting next-generation technologies, including initiatives in the Artificial Intelligence (AI) space. This role is ideal for a hands-on technical expert who thrives in complex environments and is passionate about building, maintaining, and optimizing enterprise systems.
Key Responsibilities:
  • Design, implement, and maintain Windows-based systems, networks, and applications
  • Architect and support enterprise-level Windows infrastructure
  • Administer and manage:
    • Active Directory
    • Group Policy
    • DNS
    • File servers
    • Exchange / enterprise email systems
  • Manage patching, updates, and system performance optimization
  • Monitor systems, troubleshoot issues, and ensure high availability
  • Support system deployments using tools such as SCCM or MDT
  • Develop and maintain technical documentation and standard operating procedures
  • Provide Tier II/III technical support via phone, email, and in-person
  • Collaborate with cross-functional IT teams to integrate new technologies
  • Travel up to 20% for on-site support, installations, and maintenance

Requirements
  • MUST have a current and active TS/SCI clearance with CI Poly
  • 8+ years of experience as a Windows System Administrator or similar role
  • Deep expertise in Windows Server and Desktop operating systems
  • Strong experience with enterprise infrastructure design and support
  • Hands-on experience with Active Directory, Group Policy, DNS, and patch management
  • Proven ability to troubleshoot and resolve complex technical issues
  • Excellent communication and interpersonal skills
  • IAM Level II certification (DoD 8570 IAT compliant)

Preferred Qualifications
  • Experience with Linux (server or workstation environments)
  • Scripting and automation skills (PowerShell, Python, Bash)
  • Microsoft certifications (MCSA, MCSE) or equivalent
  • Experience with virtualization technologies (VMware, Hyper-V, KVM)
  • Knowledge of backup and disaster recovery strategies
  • Familiarity with security best practices (firewalls, antivirus, etc.)
  • SQL Server administration experience
  • Experience with ITSM platforms such as ServiceNow

Core Competencies
  • Problem-Solving: Strong analytical skills with the ability to resolve complex system issues
  • Communication: Clear and effective communicator across technical and non-technical teams
  • Collaboration: Team-oriented with the ability to work across multiple stakeholders
  • Mentorship: Ability to guide junior engineers and promote best practices
  • Ownership: Proactive mindset with strong accountability for system performance and reliability

Benefits
Our comprehensive benefits package for full-time salaried employees is effective immediately upon the start date. Benefits include comprehensive PPO medical coverage with access to a Health Savings Account (HSA) option, a vision plan, and dental insurance with the base dental plan option paid for by PGTEK. Life Insurance, Short and Long-Term disability, and Critical Illness insurance have premiums covered. Additionally, PGTEK offers a matching 401(k) plan and a discount on pet insurance through ASPCA Pet Insurance. An Employee Assistance Program is available at no cost to all employees. PGTEK offers a generous amount of PTO and Holidays, and an Education Assistance Program is available after 12 months of employment.
ABOUT PGTEK:
PGTEK is a true consulting organization dedicated to helping clients achieve their business and technology objectives utilizing our decades of experience and business relationships. PGTEK invests in the educational advancements of our staff by providing the necessary resources to complete Professional and Business Certifications. Our company is our people, and we treat them like family.
EOE, including disability/veterans

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