RHEL & OpenShift Platform Engineer

ZENITH INFOTECH (S) PTE LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Zenith Infotech (S) Pte Ltd. is seeking an experienced Linux/OCP specialist to manage RHEL platforms and OpenShift clusters in a demanding enterprise environment. The role covers OS patching, hardening, and VM/container governance across production systems.

You will lead platform administration, drive security hardening, and coordinate with DevOps teams to ensure reliable application delivery and scalable container architectures.

Qualifications

• Hands-on experience administering RHEL 8/9 in enterprise production environments.
• Proficiency in OS-level patching, package management (dnf/yum), SELinux enforcement, and system hardening per CIS/DISA benchmarks.
• Experience with RHEL Extended Update Support (EUS) lifecycle management and version upgrades.
• Familiarity with RHEL subscription management, satellite server, and image-based deployments (RHEL Image Mode / Bootch).

Responsibilities

• RHEL Platform Management across production fleet with minimal service disruption.
• OCP Cluster Administration: deploy, upgrade, and maintain 4.x clusters and related node lifecycle.
• Manage MCO for node OS customization, including chrony NTP, SSH hardening, and kernel args.
• Implement security hardening, RBAC, and network policies; support container workloads.

Skills

RHEL System Administration

OCP Administration

Enterprise Container Architecture

Tools

Quay registry

Kubernetes

IBM MQ

Job description

Zenith Infotech (S) Pte Ltd. is seeking an experienced Linux/OCP specialist to manage RHEL platforms and OpenShift clusters in a demanding enterprise environment. The role covers OS patching, hardening, and VM/container governance across production systems.

You will lead platform administration, drive security hardening, and coordinate with DevOps teams to ensure reliable application delivery and scalable container architectures.