Systems Administrator

Job Title:

Systems Administrator

Job Category:
Information Technology

Time Type:
Full time

Minimum Clearance Required to Start: TS/SCI with Polygraph

Employee Type:
Regular

Percentage of

Travel Required:

Up to 10%

Type of Travel:
Local

* * *

CACI is seeking a Classified Systems Administrator to support and maintain mission‑critical classified information systems in a secure environment. This role combines systems engineering, systems administration, cybersecurity, virtualization, and Information Assurance (IA) responsibilities to ensure the reliability, security, and compliance of classified networks. The ideal candidate will manage Windows Server infrastructure, virtualization platforms, enterprise applications, storage solutions, and security technologies. This position supports continuous system modernization in a high‑security environment.

• Install, configure, administer, and maintain Microsoft Windows Server operating systems across classified environments.
• Manage virtualization platforms including VMware, Hyper‑V, and Nutanix, ensuring availability, performance, and security.
• Administer enterprise services and applications including Microsoft Exchange, Microsoft SQL Server, Skype for Business, Jira, and Confluence.
• Troubleshoot, analyze, and resolve hardware, software, networking, and infrastructure issues across multiple classified networks.
• Monitor system performance, apply operating system patches, and implement security mitigations using vulnerability scanning tools such as Nessus.
• Manage enterprise storage platforms including Pure Storage, Dell Power Vault, and Synology appliances.
• Administer privileged access and security solutions including RSA and Cyber Ark.
• Process classified user account requests, access modifications, and Active Directory administration in accordance with DoD and NISPOM requirements.

• Bachelor's degree (or equivalent experience) with 7+ years of Systems Engineering and Systems Administration experience.
• Active TS SCI w/ Polygraph is required.
• CompTIA Security+ (or equivalent DoD-approved certification).
• Extensive experience administering Microsoft Windows Server environments, including installation, configuration, patch management, and performance optimization.
• Hands‑on experience managing VMware, Hyper‑V, and Nutanix virtualization environments.
• Experience implementing vulnerability remediation and security mitigations using enterprise security tools (e.g., Nessus).
• Strong knowledge of Microsoft Active Directory, DNS, DHCP, and Group Policy administration.
• Excellent troubleshooting, analytical, critical thinking, and problem‑solving skills.
• Strong written and verbal communication skills with the ability to work independently and within cross‑functional technical teams.
• Demonstrated commitment to continuous learning and supporting mission‑critical classified environments.

• Experience administering Microsoft SQL Server.
• Experience administering Microsoft SharePoint Server.
• Experience supporting Skype for Business and Microsoft MECM/SCCM environments.
• Experience managing McAfee/Trellix endpoint security solutions.
• Experience with enterprise backup solutions such as Nakivo and Commvault.
• Experience supporting classified Information Assurance processes, Security Impact Analyses (SIAs), DCSA compliance, and secure data transfer operations.

At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high‑performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in…