Linux SysAdmin: DoD Infra, Automation & Security

General Dynamics Information Technology; Virginia (MN); On-site; USD 132,000 - 178,000; Full time

Job summary

General Dynamics Information Technology is seeking a Linux Systems Administrator to support mission-critical enterprise IT systems in a DoD environment. You will help modernize agency operations while ensuring secure, reliable Linux infrastructure.

Ideal candidates have 3–5 years in Linux administration, active DoD Secret clearance or higher, and relevant certifications. The role involves automation, scripting, and collaboration across networks and cybersecurity teams.

Qualifications

• Education: Degree preferred, experience may be substituted for degree.
• Clearance: Active DoD Secret clearance or higher at time of hire.
• Certification(s): Current CompTIA Security+ CE or equivalent certification meeting DoD requirements.
• Technical Certification: Certification in at least one relevant discipline (RHCSA/RHCE, Ansible, Linux Foundation or equivalent).
• Experience: 3–5 years in Linux administration, systems administration, or related field; 2+ years in production Linux environment.

Responsibilities

• Administer and maintain Red Hat Enterprise Linux systems supporting mission critical applications.
• Perform OS installation, configuration, patching, upgrades, troubleshooting, and lifecycle maintenance.
• Monitor OS and application health, resources, storage, logs, services, and performance.
• Troubleshoot Linux OS, application, connectivity, or infrastructure issues.
• Support Linux systems in VMware and other virtualized environments.
• Support enterprise apps like ISE, ClearPass, RSA, LDAP, InfoBlox, CloudVision, AirWave, Cisco Prime, Junos Space, CyberSecureIMS.
• Participate in upgrades, maintenance, configuration changes, testing, and service restoration.
• Develop Bash or Python scripts to automate recurring tasks.
• Support Ansible and GitLab automation and CM.
• Maintain system documentation and runbooks.
• Cross training, on-call support, and business-hours coverage.

Skills

Automation Management

Critical Infrastructures

Network Operations

Network Performance

Reverse Engineering

Education

Degree preferred

Tools

RHCSA

RHCE

Red Hat Ansible certification

Linux Foundation certification

Equivalent Linux, networking, virtualization, or infrastructure certification

Job description

General Dynamics Information Technology is seeking a Linux Systems Administrator to support mission-critical enterprise IT systems in a DoD environment. You will help modernize agency operations while ensuring secure, reliable Linux infrastructure.

Ideal candidates have 3–5 years in Linux administration, active DoD Secret clearance or higher, and relevant certifications. The role involves automation, scripting, and collaboration across networks and cybersecurity teams.