Senior Linux Systems Administrator — DoD/Air Force

DNI (Delaware Nation Industries); Dahlgren (VA); On-site; USD 110,000 - 150,000; Full time

Job summary

Delaware Nation Industries is seeking a Senior Linux System Administrator to provide advanced systems administration and engineering support for Air Force mission systems. You will maintain secure, resilient Linux infrastructure across classified and unclassified environments, serving as a technical authority for Linux, virtualization, automation, and system security.

The role requires independent problem solving, leadership in technical efforts, development of repeatable processes, and

Qualifications

• Active DoD TS/SCI security clearance.
• At least six years of Unix/Linux systems administration experience.
• DoD 8570/8140-compliant IAT III certification (e.g., CISSP, CASP+ or equivalent).
• Experience administering enterprise Linux in a DoD/intelligence environment.
• Strong knowledge of Linux architecture, networking, storage, and services.
• Experience with backup, patch management, security hardening, vulnerability remediation, and config control.
• Experience with virtualization, preferably VMware vSphere.
• Shell scripting proficiency and ability to automate tasks.
• Strong communication and ability to lead initiatives.

Responsibilities

• Administer and maintain enterprise Linux systems across security levels.
• Install, patch, configure, and decommission Linux OS and services.
• Support Red Hat and other distros; manage services, storage, networking.
• Design repeatable procedures for builds, provisioning, patching.
• Perform root-cause analysis and implement durable fixes.
• Monitor availability, performance, security; identify risks.
• Manage VMware virtualized infrastructure and storage dependencies.
• Develop automation scripts with Bash, Python, Ansible, Puppet.
• Support DevSecOps practices and controlled deployments.
• Apply DISA STIGs and DoD cybersecurity requirements.
• Coordinate with cross-functional teams on incidents.
• Produce system documentation and architecture diagrams.
• Provide mentoring and knowledge transfer.

Skills

Shell scripting

Problem solving

Communication

Independent work

Leadership

Education

Bachelor's degree in IT or related field

Tools

VMware vSphere

Ansible

Puppet Enterprise

Docker

Git

Job description

Delaware Nation Industries is seeking a Senior Linux System Administrator to provide advanced systems administration and engineering support for Air Force mission systems. You will maintain secure, resilient Linux infrastructure across classified and unclassified environments, serving as a technical authority for Linux, virtualization, automation, and system security.

The role requires independent problem solving, leadership in technical efforts, development of repeatable processes, and