Senior Linux Systems Administrator

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 systemsDemonstrate ability to set priorities and organize work to meet deadlinesEnsure compliance with established standards, policies, and configuration guidelinesRequired 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 staffDemonstrated Linux expertise managing bare metal and virtualized systemsHands on experience patching, managing, and responding to DoW STIGs including POAM remediationsExperience supporting and working with ISSO’s and ISSM’sProficient in Ansible or equivalent configuration management experiencePreferred Qualifications:Proficiency in Linux storage subsystemsExperience managing RedHat Satellite systemsExperience managing containerized services within KubernetesAbility to write, diagnose, and optimize scripts written in bash, python, or perlFamiliarity managing virtual systems within VMwareWindows Server and workstation experienceIf 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, 2026For 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 - $166,850.00The 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.SummaryLocation: Dayton, OHType: Full time