Senior Windows Systems Architect (TS/SCI) - On-Site

PGTEK; McLean (VA); On-site; USD 185,000 - 265,000; Full time

Benefits offered by this job

PPO medical with HSA

Vision & Dental

Life Insurance

Disability Insurance

401(k) matching

Education Assistance after 12 months

Employee Assistance Program

Pet insurance discount

Job summary

PGTEK is seeking a Senior System Administrator to maintain Windows-based infrastructure, including AD, DNS, group policy, and enterprise email, in support of next‑generation tech initiatives in the VA corridor.

You will design, deploy, patch, monitor, and troubleshoot Windows systems, provide Tier II/III support, and collaborate across IT teams. TS/SCI clearance required; up to 20% travel.

Qualifications

• Active TS/SCI clearance with CI Polygraph is required.
• 8+ years experience as Windows System Administrator or similar role.
• Deep expertise in Windows Server and Desktop operating systems.
• Hands-on with Active Directory, Group Policy, DNS, and patch management.
• Excellent communication and interpersonal skills; DoD 8570 IAT Level II.
• Experience with enterprise infrastructure design and support.

Responsibilities

• Design, implement, and maintain Windows-based systems, networks, and apps.
• Architect and support enterprise Windows infrastructure.
• Administer AD, Group Policy, DNS, and patch management.
• Monitor, troubleshoot, and ensure high availability of systems.
• Provide Tier II/III support via phone, email, and in‑person.
• Deploy system updates using SCCM/MDT and document SOPs.
• Collaborate with IT teams to integrate new technologies.

Skills

Windows Server

Active Directory

Group Policy

DNS

Exchange

Patching & updates

SCCM/MDT

Troubleshooting

IAM DoD 8570 IAT

Tools

VMware

Hyper-V

KVM

ServiceNow

SCCM/MDT

Job description

PGTEK is seeking a Senior System Administrator to maintain Windows-based infrastructure, including AD, DNS, group policy, and enterprise email, in support of next‑generation tech initiatives in the VA corridor.

You will design, deploy, patch, monitor, and troubleshoot Windows systems, provide Tier II/III support, and collaborate across IT teams. TS/SCI clearance required; up to 20% travel.