Senior Linux Systems Administrator

Leidos has a new and exciting opportunity for a Senior Linux Systems Administrator in our Intelligence Sector’s, Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security! This position is eligible for a 10k Sign on BonusJob Summary:Leidos is seeking a highly experienced Linux-focused technical professional to support systems across cloud and on-prem environments. This role requires deep expertise in Linux administration, along with experience in infrastructure, security compliance, and troubleshooting within containerized and virtualized environments.Primary ResponsibilitiesAdminister and maintain Linux-based systems across cloud and containerized environmentsManage and support storage solutions and virtualization technologiesConfigure and troubleshoot IP networking and firewall componentsApply and support PKI/TLS/cryptographic solutions, including adherence to crypto policiesPerform application support and advanced system troubleshooting within Linux environmentsSupport SSP compliance activities and STE/STN requirements on Linux systemsContribute to system automation efforts using available tools (as applicable)Basic QualificationsBachelor’s degree in a relevant field with 10+ years of experience, OR no degree with 15+ years of related professional experienceIAT Level II certification (e.g., Security+ CE, SSCP)Strong proficiency in Linux system administration (required)Experience with IP networking and firewall technologiesSolid understanding of PKI/TLS/cryptography and associated policies​Clearance Required: Must have an active TS/SCI with PolygraphThis position is eligible for a 10k Sign on BonusconmdKQWIf 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:April 15, 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: Annapolis Junction, MDType: Full time