Cyber System Administrator, Senior

Job Title: Cyber System Administrator, Senior

Job Category: Security

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI

Employee Type: Regular

Percentage of Travel Required: Up to 25%

Type of Travel: Local

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The Opportunity:

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.

Responsibilities

• Administers, configures, andmaintainsclassified and unclassified information systems supporting operational and mission requirements.

• Manages user accounts, roles, permissions, and access controlsin accordance withsecurity policies and least privilege principles.

• Monitors system performance, availability, and security using approved tools toidentifyand resolve issues.

• Implements system hardening, patch management, and configuration baselines tomaintaincybersecurity 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.

Qualifications:

Required

• 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 andmaintainingcybersecurity controls and STIG compliance

• Experience with network administration including TCP/IP, DNS, DHCP, VPN, andfirewallconfigurations

• Proficiencywith Active Directory, Group Policy, and user access management

• Knowledge of virtualization technologies (VMware, Hyper-V)

Desired Qualifications

• 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 othersensitive compartmentedinformation environments

• Experience with cybersecurity incident response and forensic analysis

• Demonstrated experience with automation and scripting (PowerShell, Python, Bash)

• Familiarity withDevSecOpspractices and CI/CD pipelines

• Experience with cloud infrastructure administration (AWS GovCloud, Azure Government)

• Previousexperience with DISA guidance, CMMC compliance, or CNSSI standards

What You Can Expect:

A culture of integrity.

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.

An environment of trust.

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.

A focus on continuous growth.

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 our legacy.

Pay Range :

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

The proposed salary range for this position is:

$71,500 - $150,200

CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.