Linux Systems Administrator
About The Position
CACI is seeking a hands-on Linux Systems Administrator III to join our Infrastructure Team supporting our family of Electronic Warfare (EW) systems. This role involves supporting an end-to-end Linux environment, including engineering workstations, build servers, virtual machines, and production systems. The administrator will apply their Linux expertise to build, maintain, troubleshoot, and improve mission-critical infrastructure, working across Linux, virtualization, automation, containerization, networking, and cybersecurity technologies. A key aspect of the role is to identify and implement improvements that increase infrastructure reliability, security, performance, and maintainability.
Requirements
- Bachelor's degree in Computer Science, Cybersecurity, Engineering, Information Technology, or a related field, or equivalent experience.
- 5+ years of hands-on Linux systems administration experience.
- Strong experience administering and troubleshooting Red Hat Enterprise Linux (RHEL) or similar enterprise Linux environments.
- Experience with Linux installation, configuration, patching, system hardening, and performance troubleshooting.
- Experience with virtualization platforms such as Proxmox and/or VMware vSphere.
- Experience with automation and configuration management tools such as Ansible and Puppet.
- Experience with container technologies including Docker and/or Podman.
- Strong working knowledge of Linux networking, DNS, storage, authentication, and system services.
- Ability to independently troubleshoot complex infrastructure issues across physical and virtual environments.
- Ability to obtain and maintain a Top Secret security clearance.
Nice To Haves
- Active Top Secret security clearance.
- Security+ certification.
- Hands-on experience administering or supporting Kubernetes or another container orchestration platform.
- Experience with infrastructure monitoring, centralized logging, CI/CD, or automated deployment environments.
- Experience supporting Linux infrastructure in classified, disconnected, or restricted-network environments.
Responsibilities
- Build, configure, maintain, patch, and upgrade Linux bare-metal servers and virtual machines, primarily running Red Hat Enterprise Linux (RHEL) and Ubuntu.
- Independently troubleshoot complex issues across Linux workstations, servers, virtual machines, infrastructure appliances, storage, authentication, and network connectivity.
- Administer and troubleshoot virtualization platforms including Proxmox and VMware vSphere.
- Develop and maintain automation and configuration management solutions using Ansible and Puppet.
- Configure, optimize, troubleshoot, and maintain Linux networking and supporting infrastructure services.
- Implement and maintain system monitoring, logging, and dashboards to proactively identify performance and availability issues.
- Design and implement infrastructure improvements to increase reliability, fault tolerance, scalability, and performance.
- Deploy, administer, and troubleshoot containerized workloads using Docker and Podman, and support Kubernetes environments.
- Review Nessus and other vulnerability scan results and remediate identified vulnerabilities through patching, configuration changes, and system hardening.
- Coordinate and perform recurring system updates, upgrades, and patching across development, test, and production environments.
Benefits
- flexible time off
- robust learning resources
- competitive compensation
- competitive benefits
- learning and development opportunities
- comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
