Senior Linux Administrator

The DTRA program at Leidos is seeking a Senior Linux Administrator inFort Belvoir, VA to support the DTRA I3TS Infrastructure Services team to maintain and optimize the Linux production environment. The candidate will be responsible for sustaining Linux servers as well as the conceptualization, design, development and implementation of new Linux capabilities. The candidate is expected to work well as a part of the DTRA Systems Administration team using ITIL best practices as well as work independently on assigned tasks. Candidate is expected to support the entire service lifecycle from design through development to production, building and deploying Linux based systems in a virtual environment.

Candidate should be familiar with system automation technologies, basic database administration and tuning. Candidate must demonstrate a high degree of problem-solving ability in a complex environment and be able to communicate effectively, both to the customer and to team members.

Work location is on-site at Fort Belvoir, VA with on-site as needed in Reston, VA.

Required Clearance: Active Top Secret with SCI

Key Responsibilities:

• Provision servers and environments
• Manage user access
• Maintain servers in a virtual environment
• Automation knowledge scripting in Unix shell and Ansible playbooks
• Maintain and improve configuration management templates
• Monitor system performance and respond to alerts
• Establish and maintain NTP services in the production environment
• Maintain satellite servers for the agency, software releases and patches

Required Qualifications:

• STEM Bachelors degree with 8+ years, or STEM Masters degree with 6+ years of experience in IT operations working with Linux servers and Virtualization. Additional, specific years of experience can be taken into account in lieu of degree.
• Experience with the following emerging technologies or an equivalent technology: Kubernetes, Open Shift, Containers, GitHub, Ansible Tower
• Ensure compliance with security standards and practices aligned with DoD STIGs.
• Experience with web servers and use of certificates
  
  • Open Source: Apache Hadoop, Zookeeper, Puppet
  • App Servers: JBoss, Tomcat, Jetty, NGINX, HTTP
• 2-3 years of experience with web server management and implementation; troubleshooting of websites, applications, and security implementations.
• Understanding of virtualized infrastructure, server backup and restoral procedures, application of STIGs and cyber hardening approaches.
• Experience with log file analysis
• Experience with Red Hat Satellite tool for deploying, configuring, and maintaining Red Hat Enterprise Linux (RHEL) across physical, virtual, and cloud environments.
• Understanding of Red Hat, provisioning, and patching, often using Satellite Capsules for distributed content delivery and local services like DHCP/DNS in large or remote setups. It centralizes RHEL management, improving security and efficiency by handling subscription management, content views, and system auditing from a single console.
• Understanding of Red Hat command line tools: System Management, Manage RPM packages, and Package Management.

Preferred Qualifications:

• 2-3+ years of Windows Server experience.

Certifications:

• DoD 8570/8140 IAT Level II certification (Security+, CySA+, GSEC, or CCNA Security) required
• Red Hat Certification - Red Hat Certified System Administrator (RHCSA) (Preferred)

Come break things (in a good way). Then build them smarter.

We're the tech company everyone calls when things get weird. We don't wear capes (they're a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for "how it's always been done."

Original Posting:
December 29, 2025

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:
Pay Range $92,300.00 - $166,850.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.