Mission-Critical Systems Administrator - TS/SCI

CACI; Springfield (VA); On-site; USD 87,000 - 182,000; Full time

Job summary

CACI is seeking a Tier 2 System Administrator in Springfield, VA to join our IT team and support mission-critical systems. You will serve as an escalation point for Tier 1, maintain servers and networking components, and ensure security and performance of the infrastructure.

Responsibilities include administering Windows, Linux, and VMware environments, Active Directory, DNS, and health checks, backups, and onboarding/offboarding users.

Qualifications

• Active TS/SCI security clearance with polygraph is required.
• At least IAT Level II certification (e.g., Security+).
• 2–4 years of hands-on IT/system support experience.
• Strong experience with Unix/Linux command line, Windows Server, Active Directory, DNS, and Group Policy.
• Experience with virtualization (VMware) and incident/problem management.

Responsibilities

• Provide advanced technical support for hardware, software, and network issues escalated from Tier 1.
• Administer and maintain servers and desktops, AD, DNS, VMware environments.
• Perform system health checks, monitor performance, and ensure backups for restore capability.
• Assist in onboarding/offboarding users and access controls.
• Document issues and solutions in ticketing systems and knowledge bases.

Skills

TS/SCI with Poly

IAT Level II Certification

2–4 years relevant experience

Unix/Linux command line

Windows Server

Active Directory

DNS

Group Policy

VMware

Security best practices

Communication skills

Tools

VMware

ServiceNow

Jira

Confluence

PowerShell

Bash

Job description

CACI is seeking a Tier 2 System Administrator in Springfield, VA to join our IT team and support mission-critical systems. You will serve as an escalation point for Tier 1, maintain servers and networking components, and ensure security and performance of the infrastructure.

Responsibilities include administering Windows, Linux, and VMware environments, Active Directory, DNS, and health checks, backups, and onboarding/offboarding users.