Classified Systems Administrator - Secure Infra & IA

CACI International Inc.; Albuquerque (NM); On-site; USD 110,000 - 170,000; Full time

Job summary

CACI International Inc. is seeking a Classified Systems Administrator to support mission-critical classified information systems. The role combines Windows Server administration, virtualization, and IA responsibilities to ensure availability, security, and DoD/compliance adherence.

You will work with security teams across environments, perform vulnerability remediation, and mentor junior staff while maintaining system performance and incident response readiness.

Qualifications

• Active Secret clearance required.
• 7+ years of Systems Admin/Engineering experience.
• CompTIA Security+ or equivalent DoD cybersecurity certification.
• Extensive Microsoft Windows Server administration experience.
• Experience with VMware/Hyper-V/Nutanix virtualization.
• Experience with Nessus vulnerability management.
• Strong AD/GP/DNS/DHCP and IAM knowledge.

Responsibilities

• Install, configure, and maintain Windows Server in classified environments.
• Manage virtualization platforms (VMware, Hyper-V, Nutanix) for availability, performance, and security.
• Administer Exchange and SQL Server.
• Patch systems and remediate vulnerabilities; monitor health.
• Provide Tier III support and root-cause analysis.
• Collaborate with security teams on IA and DoD compliance.
• Prepare Security Impact Analyses and coordinate approvals.
• Mentor junior technicians and participate in after-hours maintenance.

Skills

Active Secret clearance

7+ years experience

CompTIA Security+

Windows Server

VMware

Hyper-V

Nutanix

Nessus

Active Directory

Group Policy

DNS

DHCP

DoD/compliance

Education

Bachelor's degree in Information Technology, Computer Science, Systems Engineering, Cybersecurity, or related discipline

Tools

Nessus

Job description

CACI International Inc. is seeking a Classified Systems Administrator to support mission-critical classified information systems. The role combines Windows Server administration, virtualization, and IA responsibilities to ensure availability, security, and DoD/compliance adherence.

You will work with security teams across environments, perform vulnerability remediation, and mentor junior staff while maintaining system performance and incident response readiness.