Supervisor, Linux & Unix Systems Engineer

Select Medical • Addison, TX

22h

About The Position

Concentra is recognized as the nation’s leading occupational health care company. With more than 40 years of experience, Concentra is dedicated to our mission to improve the health of America’s workforce, one patient at a time. With a wide range of services and proactive approaches to care, Concentra colleagues provide exceptional service to employers and exceptional care to their employees. The Linux & Unix Systems Engineering Supervisor leads a small team of engineers (Levels I–III) responsible for supporting and modernizing RHEL and Solaris platforms. This player-coach role balances people leadership with hands-on engineering to ensure reliability, security, and operational excellence across enterprise systems. The supervisor guides architecture decisions, oversees workload distribution, ensures compliance, and represents the team in cross-functional forums (CAB/ARB) and strategic initiatives.

Requirements

• Education Level: Bachelor’s Degree
• Major: Computer Engineering, Computer Science, Information Technology
• Degree must be from an accredited college or university.
• 7+ years of relevant Linux/Unix systems engineering experience (RHEL/Solaris)
• 1–3 years of team leadership in a technical capacity (lead engineer, supervisor, or similar), preferably in small teams
• Mastery of RHEL 8/9; strong Solaris 11 experience (Zones, LDOMs)
• Proven experience with multi-site operations, virtualization (VMware/KVM), and identity integration (SSSD/AD/LDAP/Kerberos)
• Demonstrated expertise of Configuration-as-Code (Cac), automation (e.g., Ansible) and IaC (Terraform)
• Experience supporting audits (SOX, HIPAA, PCI) and driving RCAs and continuous improvement initiatives
• Familiarity with observability platforms (e.g., Prometheus, Splunk, Dynatrace, Grafana, Datadog)
• Concentra Core Competencies: Service Mentality, Attention to Detail, Sense of Urgency, Initiative, Flexibility
• Leadership & Communication: Coaches multi-level engineers; provides clear direction; communicates technical issues tonon-experts; facilitates cross-team alignment
• Operational Excellence: Prioritizes workload; manages SLAs and KPIs; enforces standards and documentation quality; ensures on-call readiness
• Technical Oversight: Reviews/approves designs and automation patterns; contributes hands-on to complex builds and escalations; maintains strong security posture
• Governance & Process: Leads CAB/ARB participation; supports audits; manages change control; drives continuous improvement and modernization

Nice To Haves

• Red Hat Certified Engineer (RHCE) preferred; Red Hat Certified Architect (RHCA) beneficial; ITIL Foundation helpful

Responsibilities

• Team Leadership & People Management: Supervise 2–4 engineers (Linux/Unix Systems Engineer I–III); conduct regular 1:1s, coaching,and performance feedback. Plan and assign work based on skill level; set team goals, priorities, and deliverable timelines. Lead hiring/onboarding for the team; create individualized development plans (e.g., RHCSA →RHCE → RHCA). Mentor Engineer I in foundational skills; guide Engineer II in project ownership; review Engineer III designs as technical lead.
• Operational Ownership & Escalation: Own operational KPIs: patch & hardening compliance, SLA adherence, backup verification, configuration drift, and automation coverage. Manage on-call readiness, rotation, and escalation paths; lead post-incident RCAs and drive corrective actions. Ensure audit readiness (SOX, HIPAA, PCI) and coordinate evidence with Security/Compliance
• Architecture & Engineering (Hands-On as Needed): Oversee and participate in design and deployment of RHEL and Solaris platforms across physical and virtualized environments (AWS; Azure; VMware; LDOMs/Zones). Support container development and administration (such as Docker, Podman; Kubernetes/OpenShift environments where applicable). Guide HA cluster architectures (e.g., Pacemaker/Corosync) and enterprise storage (LVM, ZFS, Stratis, Ceph Storage, or other enterprise storage technologies). Review and approve Configuration-as-Code (e.g., Ansible) and Infrastructure-as-Code (e.g., Terraform) patterns, author critical modules or reference templates when necessary. Oversee standard OS images (Kickstart, cloud-init) and repository/lifecycle management; ensure consistency across environments. Direct advanced troubleshooting during complex outages; partner with Principal/Staff engineers for architectural escalations.
• Security, Compliance & Standards: Enforce OS hardening standards (DISA STIG, CIS benchmarks) and vulnerability remediation processes. Maintain platform standards, SOPs, and runbooks; ensure documentation quality and currency. Ensure change control quality and provide approvals for production changes. Validate platform readiness for releases and new deployments.
• Cross-Functional Collaboration & Governance: Represent the team in CAB and Architecture Review Board; communicate impacts/risks to stakeholders. Coordinate work with DevOps, Security, DBAs, Virtual Infrastructure, Networking, and Application Development teams. Provide input on tooling, licensing, and training budgets relevant to Linux/Unix operations.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 5,001-10,000 employees