Senior Linux Systems Engineer | TS Clearance

CACI International Inc.; Sterling (VA); On-site; USD 87,000 - 182,000; Full time

Job summary

CACI International Inc. is seeking a hands-on Linux Systems Administrator III to join our Infrastructure Team, supporting EW systems. You will manage Linux environments, build and patch servers, and troubleshoot across VMs, workstations, and infrastructure components.

You’ll work with Proxmox and VMware, automate with Ansible/Puppet, and deploy container technologies including Docker/Podman and Kubernetes, ensuring reliability and security in a mission-critical setting.

Qualifications

• Bachelor's degree or equivalent experience.
• 5+ years of hands-on Linux systems administration experience.
• Active Top Secret security clearance.
• Security+ certification is a plus.
• Experience with Red Hat Enterprise Linux (RHEL) and Ubuntu.
• Experience with virtualization platforms such as Proxmox and VMware vSphere.
• Experience with automation/configuration tools like Ansible and Puppet.
• Experience with container technologies including Docker/Podman.
• Strong knowledge of Linux networking, DNS, storage, authentication, and services.

Responsibilities

• Build, configure, maintain, patch, and upgrade Linux servers and VMs (RHEL/Ubuntu).
• Troubleshoot complex issues across Linux workstations, servers, and networks.
• Administer virtualization platforms (Proxmox, VMware vSphere).
• Develop automation/configuration management with Ansible and Puppet.
• Configure networking, storage, monitoring, and logging services.
• Deploy and troubleshoot Docker/Podman containers and Kubernetes environments.

Skills

Linux administration

Networking

Troubleshooting

System hardening

Security practices

Scripting

Education

Bachelor's degree in Computer Science, Cybersecurity, Engineering, IT, or related field

Tools

Proxmox

VMware vSphere

Docker

Podman

Kubernetes

Ansible

Puppet

Job description

CACI International Inc. is seeking a hands-on Linux Systems Administrator III to join our Infrastructure Team, supporting EW systems. You will manage Linux environments, build and patch servers, and troubleshoot across VMs, workstations, and infrastructure components.

You’ll work with Proxmox and VMware, automate with Ansible/Puppet, and deploy container technologies including Docker/Podman and Kubernetes, ensuring reliability and security in a mission-critical setting.