Tier 2 Systems Administrator | TS/SCI, On-Call

CACI International Inc; Springfield (VA); On-site; USD 86,600 - 181,800; Full time

Job summary

CACI International Inc in Springfield, VA is seeking a Tier 2 Systems Administrator to join our IT team. You will serve as escalation point for Tier 1 and maintain mission‑critical systems, ensuring security and performance while supporting end users.

The role requires TS/SCI with Polygraph, IAT II Security+, 2–4 years of hands‑on IT experience, and strong skills in VMware, AD, DNS, and Group Policy. Weekly on‑call rotation and after‑hours support are required.

Qualifications

• Must have an active TS/SCI with Polygraph.
• Must have at least an IAT Level II Certification such as Security+.
• Must be willing to participate in weekly day support hours rotation – 7‑3, 8‑4, 9‑5, 10‑6 and an after‑hours on‑call support rotation.
• 2‑4 years of hands‑on experience in a system or IT support role.
• Strong knowledge and experience with command line in a Unix environment, Windows Server, Windows desktop, Active Directory, DNS, and Group Policy.
• Experience with virtualization technologies (VMware).
• Proficiency in troubleshooting custom software, network connectivity and performance issues.
• Strong understanding of security best practices and data protection.
• Excellent communication and interpersonal skills.

Responsibilities

• Provide advanced technical support for hardware, software, database, custom software and network‑related issues escalated from Tier 1.
• Administer and maintain servers (Windows, Linux, Solaris), desktops and applications, printers and peripheral equipment, Active Directory and virtual environments (VMware).
• Perform system health checks, monitor system performance and ensure backups are running for restoration capability.
• Assist in onboarding/offboarding of users, including account setup and access controls.
• Document technical issues, solutions, and processes in ticketing systems and knowledge bases.

Skills

TS/SCI with Polygraph

Unix command line

Windows Server administration

Active Directory

DNS

Group Policy

VMware

Communication skills

On-call support

Education

IAT Level II Certification such as Security+

Tools

VMware

Active Directory

DNS

Group Policy

Windows Server

Job description

CACI International Inc in Springfield, VA is seeking a Tier 2 Systems Administrator to join our IT team. You will serve as escalation point for Tier 1 and maintain mission‑critical systems, ensuring security and performance while supporting end users.

The role requires TS/SCI with Polygraph, IAT II Security+, 2–4 years of hands‑on IT experience, and strong skills in VMware, AD, DNS, and Group Policy. Weekly on‑call rotation and after‑hours support are required.