Linux Administrator Security Clearance

Position: Linux Administrator with Security Clearance
Linux Administrator Job Category:
Information Technology Time Type:
Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type:
Regular Percentage of

Travel Required:

None Type of Travel:
None *
* * We are seeking a highly 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 Dev Ops practices and CI/CD pipelines.

• Familiarity with cloud platforms (AWS, Azure, or Gov Cloud).

• Experience with containerization technologies (Docker, Kubernetes, Open Shift).

• 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.

- ________________________________________________________________________________________ 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. ________________________________________________________________________________________ Pay Range:
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