What are the responsibilities and job description for the Linux Administrator position at CACI?
We are seeking a skilled and motivated Linux Administrator to join our Federal IT Operations team. The successful candidate will manage and support enterprise Linux systems that are mission-critical to national security operations. This role requires technical expertise, problem-solving ability, and collaboration with cross-functional teams in a secure, fast-paced environment.
Responsibilities
• Install, configure, secure, and maintain Linux servers (RHEL, CentOS, Ubuntu, or similar distributions).
• Perform system administration tasks including user management, patching, monitoring, and troubleshooting.
• Support system hardening and compliance with DoD/Federal security standards (STIGs, DISA, NIST).
• Manage storage, backup, and recovery solutions for Linux environments.
• Develop and maintain automation scripts (Bash, Python, Ansible, Puppet, or similar) for system provisioning and configuration management.
• Support virtualization platforms (VMware, KVM, Hyper-V) and containerized workloads (Docker, Kubernetes).
• Monitor system performance, availability, and capacity; implement proactive solutions.
• Collaborate with network, security, and application teams to resolve system issues and improve reliability.
• Maintain documentation of configurations, procedures, and system updates.
• Participate in on-call support rotation and respond to critical system alerts.
• Support accreditation and certification activities in alignment with RMF (Risk Management Framework).
Required Qualifications
• Active Top Secret clearance (SCI eligibility strongly preferred).
• 5 years of experience in Linux system administration (RHEL, CentOS, or Ubuntu preferred).
• Strong knowledge of system hardening, patch management, and security compliance.
• Hands-on experience with shell scripting and automation tools (Bash, Python, Ansible, Puppet, or similar).
• Experience with troubleshooting performance issues at system and application levels.
• Familiarity with networking concepts (TCP/IP, DNS, DHCP, firewalls).
• Understanding of storage systems (SAN, NAS, iSCSI, NFS) and backup/recovery solutions.
• Ability to work effectively in a secure, team-oriented, mission-driven environment.
Desired Qualifications
• Bachelor’s degree in Computer Science, Information Systems, or related discipline (or equivalent work experience).
• Experience in federal government or DoD environments.
• Experience with DevOps practices and CI/CD pipelines.
• Familiarity with cloud platforms (AWS, Azure, or GovCloud).
• Experience with containerization technologies (Docker, Kubernetes, OpenShift).
• Knowledge of Identity and Access Management (IAM) and integration with Linux systems.
• Red Hat Certified System Administrator (RHCSA) or Red Hat Certified Engineer (RHCE) certification.
• ITIL, Security , or other relevant industry certifications.
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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:
$86,600 - $181,800Salary : $86,600 - $181,800
