Senior Windows Systems Administrator - TS/SCI Clearance

MANTECH; Chantilly (VA); On-site; USD 90,000 - 140,000; Full time

Job summary

MANTECH is seeking a Senior Windows Systems Administrator in Chantilly, VA to maintain and enhance our Windows environment within a dynamic Big Data ecosystem. You will work on security-conscious operations, collaborate across IT teams, and support the Sponsor’s national security missions.

The role emphasizes building and hardening Windows servers, patch management, and cross-functional problem solving, with opportunities for growth in a fast-paced environment.

Qualifications

• High school diploma or equivalent with extensive Windows experience.

Responsibilities

• Sustain and improve Windows infrastructure as part of a collaborative systems team.
• Research and resolve operating system problems efficiently and accurately.
• Troubleshoot OS issues with cross-functional teams including development and networking.
• Build and harden Windows servers; establish and manage configuration baselines.
• Plan, test, install, and maintain OS updates and upgrades.
• Apply security patches promptly; assist in patch management strategies.
• Test and integrate new hardware and software components.
• Manage the lifecycle of operating systems.
• Document configurations and processes; design interfaces to external systems.

Skills

Active Directory

PowerShell

Scripting (VB)

Windows Server

Security patch management

Documentation

Education

High School Diploma

Tools

Centrify

SCOM

ACS

Exchange/Outlook

Symantec/McAfee

Job description

MANTECH is seeking a Senior Windows Systems Administrator in Chantilly, VA to maintain and enhance our Windows environment within a dynamic Big Data ecosystem. You will work on security-conscious operations, collaborate across IT teams, and support the Sponsor’s national security missions.

The role emphasizes building and hardening Windows servers, patch management, and cross-functional problem solving, with opportunities for growth in a fast-paced environment.