L3 RedHat Administrator

Job Description: L3 RedHat Administrator

Job Summary

We are looking for an experienced L3 Linux & OpenShift Support Admin to provide advanced production support for Linux infrastructure and Red Hat OpenShift environments. The role involves troubleshooting complex incidents, performing root-cause analysis, managing platform stability, and working closely with application, network, storage, security, and DevOps teams.

Key Responsibilities

• Provide L3 production support for Red Hat Enterprise Linux (RHEL) servers and OpenShift/Kubernetes platforms.
• Troubleshoot complex Linux issues involving CPU, memory, disk, filesystem, networking, processes, services, and system performance.
• Manage Linux patching, configuration, and lifecycle using Red Hat Satellite.
• Develop and manage Ansible playbooks for automation and server configuration.
• Administer and troubleshoot OpenShift clusters, nodes, projects/namespaces, pods, deployments, routes, services, ingress, and operators.
• Investigate pod failures, CrashLoopBackOff, image-pull issues, scheduling problems, node degradation, and application connectivity issues.
• Perform OpenShift cluster health checks, upgrades, patching, configuration changes, and capacity management.
• Troubleshoot container runtime, networking, DNS, storage, persistent volumes, and authentication/authorization issues.
• Analyze system and application logs using tools such as journalctl, rsyslog, oc, kubectl, and centralized logging platforms.
• Perform Root Cause Analysis (RCA) and prepare incident/problem-management documentation.
• Handle critical incidents and participate in 24x7 on-call support when required.
• Work with Red Hat Support and other technology vendors on complex platform issues.
• Automate repetitive operational tasks using Shell scripting, Python, Ansible, or similar tools.
• Support CI/CD pipelines and integrations with Git, Jenkins, GitLab, Argo CD, or similar DevOps platforms.
• Implement monitoring, alerting, and proactive health checks for Linux and OpenShift environments.
• Follow ITIL processes for incident, problem, change, and service-request management.
• Maintain technical documentation, operational procedures, and knowledge-base articles.

Linus Management & Support

• Provide L3 support for Linux servers and resolve complex technical issues.
• Troubleshoot OS, performance, storage, networking, and application issues.
• Perform Linux server administration, patching, upgrades, and configuration.
• High Availability & Clustering: Design, deploy, and manage highly available (HA) Linux cluster configurations using tools like Pacemaker, Corosync, or Veritas Cluster Server (VCS).
• Manage Linux patching, configuration, and lifecycle using Red Hat Satellite.
• Develop and manage Ansible playbooks for automation and server configuration.
• Monitor system health, performance, and availability.
• Conduct RCA for major and recurring incidents.
• Automate operational tasks using Shell/Bash scripting.
• Collaborate with application, network, database, and security teams.
• Support production changes, maintenance, and 24×7/on-call operations.

OpenShift / Kubernetes

• Strong production experience with Red Hat OpenShift.
• Good understanding of Kubernetes architecture and components.
• Experience troubleshooting:
  • Pods and containers
  • Deployments and StatefulSets
  • Services and Routes
  • ConfigMaps and Secrets
  • Nodes and scheduling
  • Persistent Volumes/PVCs
  • Operators
  • OpenShift networking
  • Image registries
  • RBAC and authentication
• Proficiency with oc and kubectl commands.
• Experience with OpenShift installation, configuration, upgrades, patching, and cluster troubleshooting.

Automation & DevOps

• Shell scripting and/or Python.
• Ansible automation.
• Understanding of CI/CD concepts and tools.
• Experience with Git-based workflows.
• Familiarity with monitoring tools such as Prometheus and Grafana.

General Responsibilities

• Participate in ITIL-aligned incident, change, problem, and access management processes.
• Maintain operational documentation, SOPs, and runbooks.
• Provide L3 support and collaborate with vendors for issue resolution.
• Generate dashboards, reports, and recommendations on platform performance, utilization, and security.
• Support migration, upgrade, and transformation initiatives across cloud and virtualization platforms.

Required Skills & Experience

• 5–8+ years of experience in Linux system administration/production support.
• 3+ years of hands-on OpenShift/Kubernetes experience.
• Proven experience supporting business-critical production environments.
• Strong incident management, troubleshooting, RCA, and stakeholder communication skills.

Preferred Certifications

• Red Hat Certified System Administrator (RHCSA)
• Red Hat Certified Engineer (RHCE)
• OpenShift / Containers: Red Hat OpenShift Administration, CKA - Optional
• ITIL: ITIL 4 Foundation

Education

Bachelor’s degree in Computer Science, Information Technology, or related field. Equivalent practical experience may be considered.