Senior Linux Systems Engineer – DoD Secured Infra

DNI (Delaware Nation Industries); Dahlgren (VA); On-site; USD 120,000 - 160,000; Full time

Job summary

Delaware Nation Industries seeks a Senior Linux System Administrator to provide advanced systems administration and engineering support for Air Force JWICS/JITS missions. You will maintain secure, resilient Linux infrastructure across classified and unclassified environments and serve as a technical authority on Linux platforms, virtualization, automation, and security.

Responsibilities include administering Linux systems, patching, configuring, and decommissioning software, plus leading

Qualifications

• Active DoD TS/SCI clearance is required.
• 6+ years of Unix/Linux systems administration experience.
• DoD 8570/8140-compliant IAT III certification or equivalent.
• Experience administering enterprise Linux in DoD/intelligence environments.
• Strong knowledge of Linux architecture, networking, storage, and security hardening.
• Experience with virtualization (VMware vSphere) and automation tooling.
• Ability to lead technical efforts and communicate with stakeholders.

Responsibilities

• Administer and maintain enterprise Linux systems across security levels.
• Install, patch, configure, and decommission Linux OS and services.
• Support RHEL and other Linux distributions, including tuning and storage.
• Develop repeatable procedures for builds, provisioning, and patching.
• Perform root-cause analysis on complex issues and implement durable fixes.
• Monitor system availability and security posture; propose improvements.
• Administer VMware virtualization and related infrastructure.

Skills

Linux systems administration

IAT III / DoD 8570

Shell scripting

VMware vSphere

Automation tooling

Technical leadership

Education

Bachelor's degree in IT / CS / cybersecurity

Tools

Puppet Enterprise

Ansible

CloudBolt

Git

Docker

Job description

Delaware Nation Industries seeks a Senior Linux System Administrator to provide advanced systems administration and engineering support for Air Force JWICS/JITS missions. You will maintain secure, resilient Linux infrastructure across classified and unclassified environments and serve as a technical authority on Linux platforms, virtualization, automation, and security.

Responsibilities include administering Linux systems, patching, configuring, and decommissioning software, plus leading