At CACI, we specialize in providing innovative and secure IT solutions to our clients in the defense and national security sectors. Our mission is to support critical infrastructure with the highest standards of service and reliability. We’re looking for a skilled System Administrator to join our team and help maintain, troubleshoot, and optimize a wide variety of IT systems.
We are hiring a seasoned System Administrator – Level 3 to provide advanced technical leadership and hands-on support for implementation, troubleshooting, optimization, and maintenance of IT systems. This role supports complex enterprise infrastructure and architecture, including UNIX/Linux/Windows systems, virtual environments, and mission systems. The ideal candidate will bring extensive experience in system engineering, security compliance, escalation resolution, and mission-aligned IT environments.
Responsibilities:
Lead implementation, configuration, troubleshooting, and maintenance of complex IT systems
Manage day-to-day operations, system monitoring, and performance optimization across diverse platforms
Provide Tier 1, Tier 2, and Tier 3 technical support and root cause analysis for escalated issues
Perform account lifecycle management and ensure compliance with Identity & Access Control Management (ICAM) policy
Ensure proper application of security patches (IAVA) and maintain accurate tracking in systems of record
Conduct detailed system analysis and capacity planning
Analyze and resolve hardware/software integration issues across server and network infrastructures
Design and support system architecture and hardware requirements in mission environments
Apply expert knowledge of UNIX, Linux, and Windows systems and networking
Coordinate system changes with ISSO and ISO, and maintain documentation per Change & Configuration Management policies
Support the Plan of Action & Milestones (POA&M) and security authorization process
Maintain and support Trusted Thin Client, enhanced VDI, and mission island concepts as required
Leverage understanding of Service-Oriented Architecture (SOA) and interdependencies between systems
Communicate effectively with agency leadership, internal customers, and service teams
If assigned to Directory Services TTOs: manage and support Active Directory, Identity Management, SCCM, DNS, Group Policy, MS Exchange, Active Roles Server, and Privileged Account Management (PAM)
Qualifications:
Bachelor’s degree in a technical field (4 additional years of SA experience may substitute for degree)
15+ years of experience as a System Administrator supporting complex programs and environments
6 years of experience in IT Service Management (ITSM)
Certifications:
DoD 8570 IAT Level II compliant (e.g., Security+ CE, CCNA Security, or equivalent)
Computing Environment (CE) Certification (Microsoft OS, Red Hat/CentOS, or equivalent)
ITIL 4 Foundation certification (required)
Preferred Skills:
Expertise with system integration, hardware/software troubleshooting, and enterprise environments
Familiarity with Trusted Thin Client, enhanced VDI technologies (e.g., remote GPU, memory scaling), and mission islands
Experience designing and maintaining secure environments compliant with federal security standards
Strong understanding of directory and identity services architecture, especially in classified environments
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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.
Your potential is limitless. So is ours.
Learn more about CACI here.
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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. Learn more here.
The proposed salary range for this position is:
$94,400 - $198,300CACI 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.