Windows Systems Administrator - McLean, VA - TS/SCI

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

• Comprehensive PPO medical coverage with access to a Health Savings Account (HSA) option
• 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 with premiums covered
• Matching 401(k) plan and a discount on pet insurance through ASPCA Pet Insurance
• Employee Assistance Program available at no cost
• Generous amount of PTO and Holidays
• Education Assistance Program available after 12 months of employment