RHEL & OpenShift Platform Engineer

U3 INFOTECH PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

U3 INFOTECH PTE. LTD. in Singapore is seeking an experienced Linux and OpenShift Administrator to manage RHEL environments and OCP clusters in production.

You will handle deployment, configuration, hardening, and Day-2 operations to ensure high availability and security. The role emphasizes integration of container platforms with messaging, API gateways, and registry workflows. The ideal candidate has hands-on RHEL 8/9 expertise, OpenShift 4.x operational skills, and knowledge of RBAC, SCC, and

Qualifications

• Hands-on experience administering RHEL 8/9 in enterprise environments.
• Experience deploying and administering OpenShift 4.x clusters.
• Familiarity with RBAC, SCC, network policies and container tooling.
• Knowledge of image-based deployments and registry management is a plus.

Responsibilities

• Deploy, configure, and administer RHEL and OCP environments in production.
• Perform Day-2 operations, upgrades, and security hardening.
• Manage networking, storage, and RBAC within OCP clusters.
• Oversee container image lifecycle and registry operations (Quay).

Skills

RHEL System Administration

OpenShift Administration

Container & Integration Platforms

Tools

Red Hat Satellite

dnf/yum

SELinux

Kubernetes/OCP 4.x

Quay registry

Job description

Key Requirements

1. RHEL System Administration – Essential

• Hands-on experience administering RHEL 8/9 in enterprise production environments.
• Strong knowledge of OS patching, package management (dnf/yum), SELinux, and system hardening.
• Experience with RHEL EUS lifecycle management and version upgrades.
• Familiarity with RHEL subscription management, Red Hat Satellite, and image-based deployments such as RHEL Image Mode/Bootc.

2. OpenShift Container Platform (OCP) Administration – Essential

• Hands-on experience deploying, configuring, and administering OCP 4.x clusters.
• Experience with Day-2 operations, including node management, Machine Config Operator (MCO), cluster upgrades, certificate management, and resource quotas.
• Knowledge of OCP networking, storage, and RBAC.
• Experience with OCP security hardening, including SCC and network policies.
• Familiarity with Quay registry administration and mirror registry setup for restricted or air-gapped environments.

3. Enterprise Container & Integration Platforms

• Experience designing or supporting containerised architectures using OCP/Kubernetes.
• Working knowledge of IBM MQ, including queue manager administration, channel configuration, troubleshooting, and HA.
• Understanding of microservices architecture, API gateway integration, and container image lifecycle management.