Senior Windows SysAdmin — TS/SCI Cleared, AI Infra

Select Search Associates LLC; Chantilly (VA); On-site; USD 120,000 - 165,000; Full time

Job summary

Select Search Associates LLC in Chantilly, VA seeks a Senior Windows Systems Administrator to design, implement, and maintain Windows-based infrastructure supporting a Federal Program with 8+ years of experience.

This role requires an active TS/SCI clearance and CI Polygraph, strong skills in AD, DNS, GPO, Exchange, SCCM/MDT, and virtualization, with travel up to 20%. You will collaborate with IT teams to ensure resilience and security of critical systems.

Qualifications

• 8+ years of experience as a Windows System Administrator or similar role.
• Must be able to architect and support Windows infrastructure.
• In-depth knowledge of Windows Server / Desktop Operating Systems.
• Strong understanding and hands-on experience with Active Directory, Group Policy, DNS, Patching and update management, File Server administration, Exchange Server / Enterprise Email Systems.
• Experience with Windows deployment tools such as SCCM or MDT.
• Familiarity with backup and disaster recovery procedures.
• Excellent problem solving skills and ability to troubleshoot complex technical issues.
• Strong communication and interpersonal skills.
• Design, implement, and maintain Windows-based systems, networks, and applications.
• Provide technical support and assistance to users via phone, email, and in-person.
• Monitor system performance, identify and resolve issues, and optimize system resources.
• Develop and maintain documentation for system administration tasks and procedures.
• Collaborate with other IT teams to ensure seamless integration of new technologies and systems.
• Stay up-to-date with the latest Windows OS updates, security patches, and best practices.
• Travel up to 20% of the time, as required, to perform on-site installations, maintenance, and troubleshooting activities at customer sites or data centers.

Responsibilities

• Design, implement, and maintain Windows-based systems, networks, and applications.
• Provide technical support and assistance to users via phone, email, and in-person.
• Monitor system performance, identify and resolve issues, and optimize system resources.
• Develop and maintain documentation for system administration tasks and procedures.
• Collaborate with other IT teams to ensure seamless integration of new technologies and systems.
• Stay up-to-date with the latest Windows OS updates, security patches, and best practices.
• Travel up to 20% of the time, as required, to perform on-site installations, maintenance, and troubleshooting activities.

Skills

Windows Server Administration

Active Directory

Group Policy

DNS

Patching & Update Management

File Server Administration

Exchange Server

SCCM

MDT

Backup & Disaster Recovery

Troubleshooting

Communication

Documentation

Collaboration

Windows OS Updates

Tools

VMware

Hyper-V

KVM

PowerShell

Python

Bash

Scripting & Automation

ServiceNow

SQL Server Administration

Job description

Select Search Associates LLC in Chantilly, VA seeks a Senior Windows Systems Administrator to design, implement, and maintain Windows-based infrastructure supporting a Federal Program with 8+ years of experience.

This role requires an active TS/SCI clearance and CI Polygraph, strong skills in AD, DNS, GPO, Exchange, SCCM/MDT, and virtualization, with travel up to 20%. You will collaborate with IT teams to ensure resilience and security of critical systems.