Classified Sys Admin (TS/SCI) - Windows/Virtualization

CACI International Inc.; Sterling (VA); On-site; USD 90,300 - 189,600; Full time

Job summary

CACI International Inc. in Sterling, VA, seeks a Systems Administrator to support and maintain mission-critical information systems in a secure environment.

This role combines systems engineering, administration, cybersecurity, virtualization, and IA responsibilities to ensure reliability and compliance across classified networks. The ideal candidate will manage Windows Server infrastructure, virtualization platforms (VMware/Hyper-V/Nutanix), and enterprise services (Exchange, SQL Server).

Qualifications

• Bachelor's degree or equivalent experience with 7+ years in Systems Engineering and Systems Administration.
• Active TS SCI w/ Polygraph required.
• Certifications such as Security+ or equivalent DoD-approved.
• Extensive experience with Windows Server environments, patching, and performance tuning.
• Hands-on virtualization: VMware, Hyper-V, Nutanix.

Responsibilities

• Install, configure, and maintain Microsoft Windows Server operating systems across classified environments.
• Manage virtualization platforms including VMware, Hyper-V, and Nutanix for availability and security.
• Administer enterprise services such as Exchange, SQL Server, Jira, and Confluence.
• Troubleshoot hardware, software, networking, and infrastructure issues across multiple networks.
• Monitor performance, apply patches, and implement security mitigations using Nessus.

Skills

Windows Server

Active Directory

Troubleshooting

Communication

Security

Education

Bachelor's degree

7+ years experience

Tools

VMware

Hyper-V

Nutanix

Nessus

RSA

CyberArk

Exchange

SQL Server

Jira

Confluence

Pure Storage

Dell PowerVault

Synology

Active Directory

Job description

CACI International Inc. in Sterling, VA, seeks a Systems Administrator to support and maintain mission-critical information systems in a secure environment.

This role combines systems engineering, administration, cybersecurity, virtualization, and IA responsibilities to ensure reliability and compliance across classified networks. The ideal candidate will manage Windows Server infrastructure, virtualization platforms (VMware/Hyper-V/Nutanix), and enterprise services (Exchange, SQL Server).