UNIX/LINUX System Engineer

The UNIX LINUX System Engineer- Mid provides day-to-day administration of UNIX/Linux server infrastructure supporting the SEC ISS contract, SEC OIT mission operations, and HALSI/HPC service environments. This role maintains secure, stable server operations across physical and virtual environments, including imaging, patching, hardening, and automated deployment activities. The engineer supports ISS server management objectives in the PWS, including operational reliability and alignment with SEC security and compliance requirements. The position partners with senior engineers and operations teams to resolve incidents quickly, maintain service continuity, and maintain required ticketing and change-control records. PRIMARY RESPONSIBILITIES: -UNIX/Linux Server Administration - Administer UNIX/Linux servers on a daily basis to ensure availability, performance, and operational stability. - Maintain server hardware and operating system software across assigned environments. - Build and image servers using approved imaging and provisioning tools. - Execute routine maintenance activities, including updates, configuration changes, and lifecycle tasks. Patching, Hardening, and Compliance - Perform regular patching of UNIX/Linux systems to maintain security posture and platform currency. - Apply server hardening standards and secure configuration baselines in accordance with SEC policy direction. - Perform automated deployments for approved UNIX/Linux server builds and updates. - Maintain technical documentation and change-control records to support operational governance and audit readiness. Virtualization and Automated Deployment - Work primarily in virtualized infrastructure environments supporting UNIX/Linux guest systems. - Support repeatable deployment and configuration activities for UNIX/Linux systems using approved enterprise methods. - Assist with operational monitoring and system health activities for virtual server environments. - Coordinate with platform teams to implement approved infrastructure changes with minimal service disruption. Troubleshooting and Operational Support - Perform basic troubleshooting and restoration for UNIX/Linux server incidents and service issues. - Escalate complex technical issues to Senior Administrators with clear diagnostics and impact details. - Update incident, request, and change records in approved ticketing systems. - Collaborate across infrastructure and operations teams to improve reliability and reduce repeat incidents. REQUIRED QUALIFICATIONS The ability to obtain and maintain SEC Public Trust (or higher if required). This position is restricted to U.S. citizens only. Applicants must not hold dual citizenship with any other country to be eligible for work under this contract. Bachelor's degree and 4+ years of experience administrating servers and systems, specializing in UNIX/Linux operating systems or additional year of experience can be considered in lieu of degree. Successful completion of a Red Hat Certified System Administrator (RHCSA) certification or equivalent within 180 days after your start date with Leidos and ability to maintain. Experience with server imaging, patching, hardening, automated deployments, basic troubleshooting, and escalation in virtualized environments. Technical Skills: UNIX/Linux system administration Server hardware and operating system maintenance Server imaging using common imaging tools Patching, hardening, and automated server deployments Basic troubleshooting and escalation of complex issues to Senior Administrators Operations in virtualized server environments PREFERRED QUALIFICATIONS Red Hat Certified Engineer (RHCE) or higher-level Linux certification. Experience supporting federal IT environments with FISMA/NIST security and compliance requirements. Experience supporting HALSI/HPC operational environments. Experience with configuration management or scripting-based automation tools (e.g., Ansible or comparable tools). RHCE CompTIA Security+ VMware Certified Professional (VCP) 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: April 27, 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 $87,100.00 - $157,450.00 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. Apply To This Job