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Open nowPosted 10 days ago

TA and Platform Engineer (RHEL & OCP Specialist)

MyCareersFuture94,028 open roles

Pay
SGD 5,200 – SGD 7,700 a month
Where
Singapore
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Your applicationOpen nowTA and Platform Engineer (RHEL & OCP Specialist)MyCareersFuture · Singapore

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  4. 14.0%14 days
  5. 33.7%30 days
This job: posted 10 days ago

The posting

Job Description:

RHEL Platform Management (Primary Focus):

  • Own and maintain the RHEL OS fleet underpinning OCP worker/control-plane nodes and non-containerised application servers.
  • Plan and execute RHEL OS patching cycles (EUS channel management, kernel upgrades, reboot sequencing) with minimal service disruption.
  • Implement and validate OS hardening benchmarks — SELinux policies, firewalld rules, auditd configuration, and cryptographic policy settings.
  • Troubleshoot system-level issues: kernel parameters, resource limits (ulimits, cgroups), storage mounts (NFS, iSCSI, SMB/CIFS PVs on OCP).
  • Manage RHEL subscriptions, entitlements, and satellite/image registries.

OCP Cluster Administration (Primary Focus):

  • Deploy, upgrade, and maintain OCP 4.x clusters — including control plane, etcd health, and worker node lifecycle.
  • Configure and manage OCP Machine Config Operator (MCO) for node-level OS customisation: chrony NTP, SSH hardening, kernel arguments, and custom MachineConfigs.
  • Manage cluster certificates, ingress/route configurations, HAProxy timeout tuning for long-running enterprise workloads (e.g., Pega BIX, batch jobs).
  • Administer Quay mirror registry — image mirroring, vulnerability scanning results, VAPT remediation for bundled components (e.g., jQuery CVEs).
  • Implement OCP RBAC, SCCs, network policies, and resource quotas across multiple namespaces and project environments.
  • Support JVM and container resource tuning for Java workloads on OCP (heap sizing, Metaspace limits, G1GC flags, container memory budgeting).

Application Platform & Integration Support:

  • Take ownership of one or more application platforms (e.g., Pega Infinity, WebSphere, IBM MQ) — covering setup in HA mode, application patching, and ongoing operational support.
  • Participate in architecture sessions with build teams, advising on integration points (web services, MQ, SFTP, API gateway).
  • Support container provisioning, image lifecycle, and deployment of containerised services across DEV / SIT / UAT / PROD environments.

Operational Governance & Security:

  • Define and execute operational processes: OS patching, application-level patching, performance monitoring, housekeeping, backup and recovery.
  • Support VAPT engagements — assess Nessus/vulnerability findings, coordinate remediation, and produce risk acceptance or remediation reports.
  • Apply government-grade security hardening principles (IM8 compliance, SSCT framework, CIS benchmarks) across RHEL and OCP layers.
  • Contribute to DevSecOps tooling and automation concepts — CI/CD pipelines, IaC, and operational runbooks.
  • Support AWS administration tasks where applicable (CloudWatch monitoring, IAM, S3, hybrid integration).

Requirements:

  • Minimum 3 years TA / infra / cloud working experience.

RHEL System Administration (Required — Primary Differentiator):

  • 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 / Bootc).

OpenShift Container Platform (OCP) Administration (Required — Primary Differentiator):

  • Hands-on experience deploying, configuring, and administering OCP 4.x clusters (bare metal or IaaS).
  • Proficiency with OCP Day-2 operations: node management, Machine Config Operator (MCO), cluster upgrades, certificate rotation, and resource quota management.
  • Experience with OCP networking (Routes, Ingress, HAProxy), storage (PV/PVC, storage classes), and role-based access control (RBAC).
  • Familiar with OCP security hardening: SSH cipher/MAC remediation via MCO, SCC policies, network policies, and image vulnerability scanning (Quay/Clair).
  • Experience with Quay registry administration including mirror registry setup for air-gapped or restricted environments.

Enterprise Container Architecture & Integration Platforms:

  • Designing and operating multi-tier containerised architectures on OCP/Kubernetes.
  • Working knowledge of IBM MQ messaging — queue manager setup, channel administration, troubleshooting, and HA configuration.
  • Familiar with microservices architecture, API gateway integration, and container image lifecycle management.
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