Senior Cyber Systems Administrator — TS/SCI Clearance

CACI International; North Carolina; On-site; USD 72,000 - 150,000; Full time

Job summary

CACI International seeks a Senior Cyber System Administrator to support a TS/SCI program, administering classified and unclassified systems, implementing security controls, and sustaining mission-critical operations in a DoD context.

This role requires DoD 8570-M certifications, RMF/ATO familiarity, and strong expertise with Windows/Linux, AD, virtualization, and network security. Up to 25% travel, full-time in NC, with a focus on mission success and continuous improvement.

Qualifications

• Bachelor's degree in a related technical field.
• 5 years cyber system administration for DoD TS or higher.
• DoD 8570-M IAT II/III certs (Security+ CE, CySA+, GICSP, GSEC, SSCP).
• Windows Server and/or Linux OS management experience.
• Experience with STIG compliance and cybersecurity controls.
• DoD RMF/ATO processes familiarity.
• Networking experience (TCP/IP, DNS, DHCP, VPN, firewall).
• Active Directory, Group Policy, and access management proficiency.
• Virtualization knowledge (VMware, Hyper‑V).

Responsibilities

• Administers, configures, and maintains classified and unclassified information systems.
• Manages user accounts, roles, permissions, and access controls.
• Monitors system performance, availability, and security.
• Implements system hardening, patch management, and baselines.
• Supports accreditation, authorization, and continuous monitoring (DoD).
• Troubleshoots hardware, software, and network issues.
• Maintains system documentation and SOPs.
• Coordinates with cybersecurity, network and operations teams for incident response.
• Performs data backup, recovery, and continuity procedures.
• Provides technical support and guidance on system capabilities and security best practices.

Skills

Cyber admin

Windows Server

Linux

Active Directory

Group Policy

VMware

Hyper-V

PowerShell

Python

Bash

DoD RMF/ATO

DoD 8570

Networking

Education

Bachelor’s degree in CS/IT/Cybersecurity

Tools

VMware

Hyper‑V

Active Directory tools

DNS

DHCP

VPN configurations

Firewall configurations

Job description

CACI International seeks a Senior Cyber System Administrator to support a TS/SCI program, administering classified and unclassified systems, implementing security controls, and sustaining mission-critical operations in a DoD context.

This role requires DoD 8570-M certifications, RMF/ATO familiarity, and strong expertise with Windows/Linux, AD, virtualization, and network security. Up to 25% travel, full-time in NC, with a focus on mission success and continuous improvement.