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 serverson a daily basisto ensure availability, performance, and operational stability.
-Maintainserver 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 tomaintainsecurity posture and platform currency.
- Apply server hardening standards and secure configuration baselinesin accordance withSEC policy direction.
- Perform automated deployments for approved UNIX/Linux server builds and updates.
-Maintaintechnical 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.
-Assistwith 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
-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 in a relevant field (e.g., Information Technology, Computer Science, Engineering). In lieu of degree, additional experience may be required.
-Ability to obtain and maintain SEC Public Trust.
- Minimum 4 years of experience administrating servers and systems, specializing in UNIX/Linux operating systems oradditionalyear of experience can be considered in lieu of degree
- Mustpossessa Red Hat Certified System Administrator (RHCSA) certification or equivalent.
- Experience with server imaging, patching, hardening, automated deployments, basic troubleshooting, and escalation in virtualized environments.
- 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.
June 4, 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 $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.
Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health. The company's global workforce of 48,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $15.4 billion for the fiscal year ended December 29, 2023.
Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.
Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.
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