Tier 2 Systems Administrator - Mission-Critical IT Support

CACI International Inc.; Springfield (VA); On-site; USD 114,070 - 154,330; Full time

Job summary

CACI International Inc. in Springfield, VA seeks a Tier 2 Systems Administrator to serve as escalation point for Tier 1 and maintain mission-critical IT systems.

The role requires TS/SCI with Poly, IAT Level II, 2–4 years of hands-on experience with Windows, Linux, Active Directory, DNS, and VMware. You will support end users, monitor systems, and help ensure security and performance.

Qualifications

• Active TS/SCI with Poly is required.
• IAT Level II certification is required.
• 2–4 years of hands-on IT/system support experience.
• Proficiency with Unix/Linux and Windows Server environments.
• Experience with VMware virtualization and enterprise network basics.
• Strong communication and interpersonal skills.

Responsibilities

• Provide advanced technical support for hardware, software, and network issues escalated from Tier 1.
• Administer and maintain Windows, Linux, and VMware environments.
• Perform system health checks and ensure backup and recovery processes.
• Manage onboarding/offboarding and access controls.
• Document issues and solutions in ticketing systems and knowledge bases.

Skills

TS/SCI with Poly

IAT Level II Certification

Unix/Linux command line

Windows Server/AD/DNS/GPO

VMware virtualization

Strong communication

Tools

ServiceNow

Jira/Confluence

SCOM monitoring

Job description

CACI International Inc. in Springfield, VA seeks a Tier 2 Systems Administrator to serve as escalation point for Tier 1 and maintain mission-critical IT systems.

The role requires TS/SCI with Poly, IAT Level II, 2–4 years of hands-on experience with Windows, Linux, Active Directory, DNS, and VMware. You will support end users, monitor systems, and help ensure security and performance.