Senior Classified Systems Engineer (TS/SCI)

CACI; Sterling (VA); On-site; USD 90,000 - 190,000; Full time

Job summary

CACI is seeking a Classified Systems Administrator to support and maintain mission-critical classified information systems in a secure environment. This role blends systems engineering, systems administration, cybersecurity, virtualization, and IA responsibilities to ensure reliability, security, and compliance of classified networks.

The ideal candidate will manage Windows Server infrastructure, virtualization platforms, enterprise applications such as Exchange and SQL Server, storage

Qualifications

• Bachelor's degree (or equivalent) 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.

Responsibilities

• 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 PowerVault, and Synology appliances.
• Administer privileged access and security solutions including RSA and CyberArk.
• Process classified user account requests, access modifications, and Active Directory administration in accordance with DoD and NISPOM requirements.

Skills

TS/SCI with Polygraph

CompTIA Security+

Active Directory

VMware

Hyper-V

Nutanix

Troubleshooting

Communication skills

Education

Bachelor's degree or equivalent

Tools

VMware

Hyper-V

Nutanix

Microsoft Exchange

Microsoft SQL Server

Jira

Confluence

Nessus

Pure Storage

Dell PowerVault

Synology

RSA

CyberArk

Job description

CACI is seeking a Classified Systems Administrator to support and maintain mission-critical classified information systems in a secure environment. This role blends systems engineering, systems administration, cybersecurity, virtualization, and IA responsibilities to ensure reliability, security, and compliance of classified networks.

The ideal candidate will manage Windows Server infrastructure, virtualization platforms, enterprise applications such as Exchange and SQL Server, storage