UNIX/LINUX System Engineer - Senior

The UNIX/LINUX System Engineer - Senior provides senior engineering and operational leadership for UNIX/Linux infrastructure under the SEC ISS contract. This role is responsible for secure, reliable, and compliant operation of Red Hat Linux-based systems across virtualized, data center, cloud-connected, and HALSI high-performance computing environments (NYRO, SEC HQ/DC, and D1 Manassas) that support SEC OIT services. The engineer leads incident response, advanced troubleshooting, and service restoration activities to maintain operational continuity and SLA performance. This position aligns with HALSI UNIX/Linux support scope (PWS 3.6.1) and supports continuous improvement of UNIX/Linux platform operations. 

 

PRIMARY RESPONSIBILITIES 

 

UNIX/LINUX Infrastructure Operations 

• Manage day-to-day administration of the UNIX/Linux server infrastructure, with primary focus on Red Hat Linux environments. 

• Perform system configuration, account administration, OS maintenance, and lifecycle support for physical and virtual servers. 

• Ensure platform availability and operational readiness across enterprise infrastructure environments. 

• Work primarily in virtualized environments supporting SEC mission operations. 

 

Engineering and Platform Delivery 

• Lead administration, design, and implementation of Red Hat Linux server-based solutions aligned to SEC standards. 

• Provide technical leadership to the UNIX/Linux Server team and oversee operational priorities. 

• Build and maintain server solutions in virtualized environments and support integration with enterprise services. 

• Support onboarding and operationalization of new UNIX/Linux capabilities, including documentation and SOP/runbook updates. 

 

Incident Management and Troubleshooting 

• Own incident management activities related to UNIX/Linux infrastructure, including triage, escalation, and resolution. 

• Perform advanced troubleshooting of complex system issues across production and non-production environments. 

• Conduct root cause analysis and implement corrective actions to reduce recurrence and improve service reliability. 

• Partner with enterprise operations stakeholders to restore service quickly and minimize mission impact. 

 

Team Leadership, Security, and Compliance 

• Provide leadership to the UNIX/Linux server team, coordinating technical execution and service delivery. 

• Oversee operational activities to maintain stable and secure UNIX/Linux services. 

• Support monitoring, patching, and vulnerability remediation in accordance with contract and operational requirements. 

• Produce and communicate operational status, risk, and performance metrics for supported UNIX/Linux services. 

 

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 years experience required.​

• Ability to obtain and maintain SEC Public Trust

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• Must have a minimum of 8 years of experience administrating and managing servers and systems, specializing in UNIX/Linux operating systems. 

• Must possess a Red Hat Certified System Administrator (RHCSA) certification or equivalent. 

• Demonstrated experience leading UNIX/Linux server operations, incident management, and advanced troubleshooting in virtualized environments. 

•  UNIX/Linux system administration with specialization in Red Hat Linux. Day-to-day management of UNIX/Linux server infrastructure. 

• Leadership of UNIX/Linux server team activities across administration, design, and implementation. 

• Incident management and advanced troubleshooting of complex UNIX/Linux system issues. 

• Operations in primarily virtualized environments. 

 

PREFERRED QUALIFICATIONS 

 

The following preferred qualifications are PWS-derived and are not core staffing-matrix minimum requirements. 

• Red Hat Certified Engineer (RHCE) or higher Red Hat specialization. 

• Experience supporting high-performance or analytics-focused UNIX/Linux environments. 

• Experience with OpenShift/Kubernetes platforms and Linux workload modernization. 

• Experience supporting hybrid cloud server environments in AWS and/or Azure. 

• ITIL 4 Foundation (or equivalent) with demonstrated SLA/operations reporting experience. 

• Red Hat Certified Specialist in Ansible Automation 

• 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 $107,900.00 - $195,050.00

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.