Senior Linux Systems Engineer (Active DoD/TS SCI)

Delaware Nation Industries; Dahlgren (VA); On-site; USD 120,000 - 125,000; Full time

Benefits offered by this job

Medical Premiums and Benefits

401K Matching

Disability Insurance

Pet Insurance

Professional Development Reimbursement

Parking/Transit Benefits

Job summary

Delaware Nation Industries is seeking a Senior Linux System Administrator to provide advanced systems administration and engineering support for the Air Force JWIC/JITS mission. You will maintain secure, resilient Linux infrastructure across classified and unclassified environments supporting mission-critical operations.

The Senior Linux System Administrator will serve as a technical authority for Linux platforms, virtualization, automation, system security, performance, and lifecycle

Qualifications

• Six or more years of Unix/Linux systems administration experience.
• DoD 8570/8140 IAT III certification (e.g., CISSP, CASP+).
• Experience in DoD/intelligence or similarly regulated environments.

Responsibilities

• Administer, engineer, optimize, and maintain enterprise Linux systems across security levels.
• Install, patch, configure, harden, and decommission Linux OS and services.
• Support RHEL and other distributions, including storage, networking, and logging.
• Design repeatable build and patching procedures; ensure lifecycle operations.
• Analyze complex systems and conduct root-cause analysis for durable fixes.
• Monitor availability, performance, and security posture; mitigate risks.
• Manage VMware or similar virtualization; work with templates and networks.
• Develop automation scripts with Bash, Python, Ansible, Puppet.
• Support DevSecOps workflows and controlled deployments.
• Apply DISA STIGs and DoD cybersecurity requirements; assist with scans.
• Maintain secure access controls and data transfer processes.

Skills

Unix/Linux systems

Shell scripting

Automation

Problem solving

Technical leadership

Education

Bachelor’s degree in IT/CS/Cybersecurity/Engineering

Tools

Puppet Enterprise

Ansible

CloudBolt

Git

Docker

Job description

Delaware Nation Industries is seeking a Senior Linux System Administrator to provide advanced systems administration and engineering support for the Air Force JWIC/JITS mission. You will maintain secure, resilient Linux infrastructure across classified and unclassified environments supporting mission-critical operations.

The Senior Linux System Administrator will serve as a technical authority for Linux platforms, virtualization, automation, system security, performance, and lifecycle