Kubernetes & OpenShift Administrator

Job Title : Kubernetes & OpenShift Administrator

Location : Rosemead, CA

Kubernetes & OpenShift Administrator
Role Overview
We are seeking a hands-on Kubernetes & OpenShift Administrator to deploy, administer, upgrade, and troubleshoot enterprise container platforms and their underlying Linux environments. The role combines platform operations, GitOps, CI/CD automation, and application onboarding to maintain secure, highly available, fault-tolerant clusters and support reliable software delivery. The ideal candidate brings practical administration experience across both Kubernetes and Kubernetes & OpenShift Administrator strong troubleshooting skills, and the ability to collaborate with application and infrastructure teams.
Key Responsibilities
• Platform deployment and lifecycle management: Install, configure, administer, upgrade, and troubleshoot Kubernetes and Red Hat OpenShift clusters on Linux, maintaining cluster health, availability, performance, and security.
• OpenShift administration: Manage OpenShift Container Platform (OCP) environments and Operator installations and upgrades; support multicluster management using Advanced Cluster Management (ACM), where applicable.
• Application onboarding and GitOps: Manage application configuration, packaging, and deployments using Helm charts, Argo CD, Git, and GitOps workflows.
• CI/CD engineering: Build and maintain Jenkins pipelines using Groovy and shared libraries; integrate source control, Nexus repositories, and Kubernetes/OpenShift deployment workflows. Support GitHub CI/CD where applicable.
• Troubleshooting and incident resolution: Diagnose and resolve cluster, application, and infrastructure issues involving pods, services, ingress, networking, DNS, certificates, container runtimes, and deployment pipelines.
• Automation and artifact management: Develop Bash and Groovy scripts to automate deployment, integration, monitoring, and routine operations; manage build artifacts, container images, and dependencies using Nexus and Git repositories.
• Linux administration: Install, configure, upgrade, and troubleshoot Red Hat Linux systems; perform system monitoring, log analysis, and performance tuning supporting container platforms.
• Platform security: Apply role-based access control (RBAC), network policies, and applicable pod security controls to support secure cluster and workload operations.
• Modernization and delivery practices: Support migration of monolithic applications to microservices on Kubernetes/OpenShift and establish consistent containerization, CI/CD, and automated testing practices.
• Collaboration and knowledge sharing: Work with application, DevOps, and infrastructure teams to resolve deployment dependencies and operational issues; mentor junior team members and share platform administration practices.
Required Technical Skills & Experience
• Strong hands-on administration experience with both Kubernetes and Red Hat OpenShift, including cluster installation, configuration, upgrades, ongoing operations, and troubleshooting.
• Experience administering OpenShift Operators and supporting highly available, fault-tolerant container platforms on Linux.
• Strong Linux administration and troubleshooting skills, particularly with Red Hat Linux, including system logs, monitoring, and performance analysis.
• Practical experience with Argo CD, GitOps, Helm, and Git for application configuration, packaging, and repeatable deployments.
• Experience building and maintaining Jenkins CI/CD pipelines, including Groovy scripting and shared libraries.
• Experience with Nexus Repository for build artifacts, dependencies, and container image management.
• Strong Bash and Groovy scripting skills for deployment and operational automation.
• Solid understanding of containerization, Docker concepts, container runtime fundamentals, Kubernetes networking, pods, services, ingress, DNS, and certificates.
• Working knowledge of RBAC, network policies, and pod security controls applicable to Kubernetes/OpenShift environments.
• Demonstrated ability to troubleshoot complex application and infrastructure issues and collaborate effectively across technical teams.
Preferred Platform Experience
• Administration of RKE2-based Kubernetes environments.
• Installation and operation of Advanced Cluster Management (ACM) for OpenShift multicluster management.
• Installation and administration of OpenShift clusters (multi-nodes).
• Installation and upgrade support for IBM Cloud Pak applications on OpenShift.
• GKE setup and operational support.
• Experience with GitHub CI/CD and automated testing integration.
• Installation and configuration of Linux/CentOS guest operating systems in VMware ESXi environments.
• Migration of monolithic applications to containerized microservices and mentoring junior administrators.