Cyber System Administrator, Senior

CACI•Fayetteville, NC

8d•$71,500 - $150,200•Onsite

About The Position

Join a team dedicated to advancing national security through innovative irregular warfare and operations expertise. CACI is looking for individuals to join a program that delivers mission-critical advisory, training, and operational support services that help mission partners stay ahead of rapidly evolving global threats. Working across geographic and functional combatant commands, these professionals play a vital role in developing, integrating, and sustaining mission-ready task forces that enhance joint force effectiveness and operational success. This is an opportunity to contribute to high-impact missions, collaborate with experienced professionals, and support strategic operations that strengthen our nation's defense capabilities around the world. Candidates who thrive in dynamic environments, embrace complex challenges, and are committed to mission excellence will find meaningful opportunities for growth and impact within CACI and on this team.

Requirements

TS/SCI clearance
Bachelor’s degree in computer science, Information Technology, Cybersecurity, or related technical field
5 years executing cyber system administration responsibilities for DOW systems in TS or higher environment
DoD 8570.01-M IAT Level II or IAT Level III certification (Security+ CE, CySA+, GICSP, GSEC, or SSCP)
Computing Environment certification (Windows: MCSA or Linux+/RHCSA, or equivalent))
Demonstrated experience managing Windows Server and/or Linux operating systems
Proven experience implementing and maintaining cybersecurity controls and STIG compliance
Experience with network administration including TCP/IP, DNS, DHCP, VPN, and firewall configurations
Proficiency with Active Directory, Group Policy, and user access management
Knowledge of virtualization technologies (VMware, Hyper-V)

Nice To Haves

DoD 8570.01-M IAM Level I, II, or III (CND, CISM, CISSP)
Advanced technical certifications (CCNA, RHCE, MCSE, or equivalent)
Cloud certifications (AWS, Azure, or CompTIA Cloud+)
Strong written and verbal communication skills for technical documentation and briefings
5+ years of experience in DoD cyber operations or military IT environments
Experience with DoD Risk Management Framework (RMF) and Authorization to Operate (ATO) processes
Background supporting SCIF or other sensitive compartmented information environments
Experience with cybersecurity incident response and forensic analysis
Demonstrated experience with automation and scripting (PowerShell, Python, Bash)
Familiarity with DevSecOps practices and CI/CD pipelines
Experience with cloud infrastructure administration (AWS GovCloud, Azure Government)
Previous experience with DISA guidance, CMMC compliance, or CNSSI standards

Responsibilities

Administers, configures, and maintains classified and unclassified information systems supporting operational and mission requirements.
Manages user accounts, roles, permissions, and access controls in accordance with security policies and least privilege principles.
Monitors system performance, availability, and security using approved tools to identify and resolve issues.
Implements system hardening, patch management, and configuration baselines to maintain cybersecurity compliance.
Supports accreditation, authorization, and continuous monitoring activities in alignment with DoD cybersecurity requirements.
Troubleshoots hardware, software, and network issues to ensure system reliability and continuity of operations.
Maintains system documentation, configuration management records, and standard operating procedures.
Coordinates with cybersecurity, network, and operations teams to support incident response and risk mitigation.
Performs data backup, recovery, and continuity procedures to protect mission-critical information.
Provides technical support and guidance to users and stakeholders on system capabilities and security best practices.