Principal System Administrator, RHEL

RTX

full-time

Posted on: 9/19/2025

Origin: • 🇺🇸 United States • Massachusetts

✨ AI Apply

💰 $82,000 - $164,000 per year

Lead

AnsibleCloudCyber SecurityDockerKubernetesLinuxNFSOpenShiftPerlPythonSplunkUnityVMware

About the role

Serve as a Linux / Red Hat Enterprise Linux (RHEL) designing, implementing, troubleshooting, and maintaining physical and virtual Linux servers across a large-scale enterprise network
System hardening, patching, automation with Ansible, provisioning with Kickstart, access control management, lifecycle management with Red Hat Satellite, virtualization with KVM, containerization with Podman or Docker, and hybrid cloud integrations with OpenShift and Kubernetes
Collaborate with engineers, software developers, systems administrators, storage, networking, and high-performance computing teams to resolve complex infrastructure and integration challenges
Partner with cybersecurity teams to ensure continuous compliance with regulatory and security frameworks such as DFARS, RMF, and the NIST Cybersecurity Framework
Provide critical, on-site support for mission systems in a closed DoD area, responding to both planned and emergent tasks, with occasional work outside standard hours and up to 10% travel as required
Obtain and maintain DoD 8140 / 8570 certification (e.g., CompTIA Security+ or equivalent) within six months of hire

Active and transferable U.S. government issued security clearance is required prior to start date
U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
Must be able to obtain Interim Clearance
DoD Clearance: Secret
Typically requires a bachelor's degree and a minimum of 5 years of prior relevant experience, or an advanced degree and 3 years of direct experience
Obtain and maintain DoD 8140 / 8570 certification (e.g., CompTIA Security+ or equivalent) within six months of hire
Experience with Red Hat Enterprise Linux (RHEL), including system installation, administration, patching, and troubleshooting in enterprise environments
Experience with virtualization technologies such as VMWare, ESXi, or similar platforms
Experience with secure system configurations, system hardening, application settings, and tailoring Linux environments