Senior Linux Systems Administrator

Leidos; Dayton (OH); On-site; USD 92,000 - 167,000; Full time

Job summary

Leidos is seeking a Linux Systems Administrator to support the DoW’s critical supercomputing environments at Wright-Patterson AFB in Dayton, OH. The role focuses on RedHat Linux administration, performance tuning, and security, with leadership responsibilities on the local System Administration Functional team.

The position requires an active Top Secret clearance, a relevant degree, and DoD 8570 IAT II certification.

Qualifications

• Bachelor's degree or master’s with required years of experience in DoD/Linux environments.
• Active TOP SECRET clearance required or ability to obtain Interim TOP SECRET before start.
• Hands-on Linux administration, patching, and security hardening (STIGs).
• Experience with Ansible or similar configuration management.

Responsibilities

• Serve as Deputy Team Lead over the local System Administration Functional team.
• Provide RedHat Linux systems administration, performance tuning, security administration, and software support.
• Perform installations, upgrades, and configuration across UNIX/Linux environments.
• Monitor and tune systems for optimal performance following SLAs and standards.
• Perform acceptance testing of modules, subsystems, and total systems.
• Monitor logs and production environments for mission-critical systems.
• Demonstrate ability to set priorities and meet deadlines.
• Ensure compliance with standards, policies, and configuration guidelines.

Skills

Linux administration

Team leadership

Communication skills

IAT II cert knowledge

Ansible or CM experience

Education

Bachelor's degree

Master's degree

Tools

RedHat Linux

Kubernetes

VMware

RedHat Satellite

POAM remediation tooling

Job description

If you’re interested in being a part of an extraordinary mission, working with our customer who runs the DoW’s largest supercomputing centers and operating some of the most powerful supercomputers in the world, we could use your experience and enthusiasm! You will be providing your Linux Systems Administration expertise to ensure DoW scientists have reliable access to these critical resources and in turn, will be directly supporting the warfighter.

All work will be performed at our customer’s site on Wright-Patterson Air Force Base in Dayton, OH and a Top Secret Clearance is required to begin work on the program.

What You’ll Do:

• Serve as Deputy Team Lead over the local System Administration Functional team.
• Provide for RedHat Linux systems administration, performance tuning, client security administration, systems software support, and technology assessments in support of a multi-platform UNIX environment.
• Perform systems enhancement, configuration, maintenance, installation, interfaces, coordination, and software installations and upgrades to UNIX operating systems and layered software packages.
• Monitor and tune systems to achieve optimum level of performance in accordance with established policies, procedures, and service level agreements.
• Perform acceptance testing of modules, subsystems, and total systems.
• Perform software installation and configuration.
• Monitor log files, performance issues, and the production environment for mission critical systems
• Demonstrate ability to set priorities and organize work to meet deadlines
• Ensure compliance with established standards, policies, and configuration guidelines

Required Qualifications:

• Must hold an active in scope TOP SECRET clearance or have the ability to obtain Interim TOP SECRET eligibility prior to start. (US Citizenship required)
• Must hold a bachelor’s degree and at least 8 years of equivalent experience, or a master’s degree and 6 years of experience.
• Must hold current DOD 8570 IAT II certification (Linux+, CCNA-Security, CND, CySA+, GICSP, GSEC, Security+ CE, or SSCP) prior to start.
• Communicates effectively both orally and in a written form with users and office staff
• Demonstrated Linux expertise managing bare metal and virtualized systems
• Hands on experience patching, managing, and responding to DoW STIGs including POAM remediations
• Experience supporting and working with ISSO’s and ISSM’s
• Proficient in Ansible or equivalent configuration management experience

Preferred Qualifications:

• Proficiency in Linux storage subsystems
• Experience managing RedHat Satellite systems
• Experience managing containerized services within Kubernetes
• Ability to write, diagnose, and optimize scripts written in bash, python, or perl
• Familiarity managing virtual systems within VMware
• Windows Server and workstation experience

If you’re looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We’re not hiring followers. We’re recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We’re already at step 30 — and moving faster than anyone else dares.

Original Posting:

October 16, 2026

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 onlyand 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.