The DTRA program at Leidos is seeking a Senior Linux Administrator in Fort 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)
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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, 2025For 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.
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.
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What We Do
We Are Leidos
For 50 years we have been tackling some of the biggest problems that face our nation and our world.
OUR MISSION
Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020.
Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.
Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.
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