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 Ability to obtain and maintain SEC Public Trust (or higher if required). U.S. citizenship only; applicants must not hold dual citizenship with any other country. Bachelor’s degree and 4+ years of experience administrating servers and systems, specializing in UNIX/Linux operating systems or an additional year of experience can be considered in lieu of a degree. Successful completion of a Red Hat Certified System Administrator (RHCSA) certification or equivalent within 180 days after start date, with the 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) Commitment to Non-Discrimination All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws. #J-18808-Ljbffr