Leidos is preparing as we anticipated a need for a Systems Administrator to support enterprise Air Force application and middleware environments within the Human Resources Systems Technical Support III (HRSTS-III) program. The role supports Linux-based middleware, messaging, web application, and database platforms in a secure Department of Defense (DoD) production environment. Primary Responsibilities: Provide administration, maintenance, patching, and troubleshooting support for enterprise middleware and application platforms within Linux-based web application, enterprise messaging, and database environments. Monitor system performance, availability, and operational health while troubleshooting application, integration, and connectivity issues. Support deployments, upgrades, patching, vulnerability remediation, and security compliance activities, and develop automation and shell scripting solutions to improve operational efficiency. Coordinate with infrastructure, cybersecurity, database, and application teams to support production operations, maintenance activities, and incident response. Basic Qualifications: Bachelor’s degree or 8+ years of relevant experience; additional experience may be considered in lieu of degree. Security+ CE certification or equivalent DoD 8570/8140 compliant certification. Experience supporting Linux server environments and enterprise application platforms. Experience supporting middleware, web application, messaging, or database technologies in production environments. Experience with shell scripting, Bash, automation tooling, or related operational scripting. Experience troubleshooting enterprise application or middleware environments. Familiarity with technologies such as IBM WebSphere Liberty, IBM HTTP Server (IHS), IBM MQ, Oracle database platforms, or similar enterprise technologies. Preferred Qualifications: Experience with enterprise middleware, messaging, or integration technologies. Familiarity with IBM DataPower Gateway, Oracle database administration, or API/web service integrations. Experience supporting vulnerability remediation, STIG compliance, and RMF activities. Experience supporting high-availability or mission-critical production environments. Experience supporting Air Force or other federal government enterprise systems. 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: May 26, 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 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.