Windows Systems Administrator – HPC/VDI, TS/SCI Eligible

Colsa; Huntsville (AL); On-site; USD 85,000 - 120,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Life insurance

401(k) with company match

Paid time off

Job summary

COLSA Corporation in Huntsville, AL is seeking a Windows Systems Administrator to design, deploy, and secure a highly virtualized IT environment, focusing on Windows Server, Nutanix HCI, VDI and HPC systems. The role requires on-site work supporting MSIC and mission-critical operations.

You will implement rigorous STIG compliance, patching, and vulnerability management, manage Active Directory and user environments, and contribute to future infrastructure refresh efforts with automation and new

Qualifications

• Associate’s degree (or higher) in information technology or a related field, or equivalent experience.
• Minimum of 0–12 years of related experience; position may be filled at varying levels based on experience.
• Must possess an active CompTIA Security+ CE, ISC2 SSCP, or equivalent baseline certification.
• Strong TCP/IP, DNS, and Firewall understanding essential for AD communication across segmented networks.
• Understanding of GPO implementation, user and group management, and permissions.
• Expertise in Windows Server (2016–2022/2025) and Windows 10/11 Enterprise administration.
• U.S. Citizenship required; Must possess an active DoD Top Secret clearance with SCI eligibility.

Responsibilities

• Architect, deploy, and maintain Windows Server and Workstation environments on Nutanix HCI.
• Administer enterprise-scale Windows VDI and HPC environments for analyst workflows.
• Perform STIG compliance, patching, and vulnerability management across isolated networks.
• Provide end-to-end technical support, AD management, and user environment management.
• Evaluate next-generation hardware and software for site refreshes.

Skills

AD administration

STIG compliance

GPO management

AD security

Network fundamentals

Education

Associate’s degree or higher in IT

Bachelor’s degree in IT (preferred)

Tools

Ansible

PowerShell SCCM

WSUS

Job description

COLSA Corporation in Huntsville, AL is seeking a Windows Systems Administrator to design, deploy, and secure a highly virtualized IT environment, focusing on Windows Server, Nutanix HCI, VDI and HPC systems. The role requires on-site work supporting MSIC and mission-critical operations.

You will implement rigorous STIG compliance, patching, and vulnerability management, manage Active Directory and user environments, and contribute to future infrastructure refresh efforts with automation and new