Platform Engineer

AVENSYS CONSULTING PTE. LTD.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

AVENSYS CONSULTING PTE. LTD. invites a skilled TA and Platform Engineer (RHEL & OCP Specialist) to join a growing global IT services team.

This 12-month contract focuses on managing RHEL platforms, securing OS hardening, and administering OpenShift clusters to support enterprise workloads. You will collaborate with architecture and operations teams to implement CI/CD pipelines, ensure system reliability, and enable scalable platform services across DEV to PROD environments.

Qualifications

• Hands-on RHEL 8/9 administration in enterprise environments.
• Proficient in patching, package management (dnf/yum), SELinux, CIS benchmarks.
• Experience with OCP 4.x deployment and basic RBAC + network concepts.
• Familiar with Quay registry management and image scanning.

Responsibilities

• Own RHEL OS fleet maintenance and patch cycles with minimal disruption.
• Deploy and manage OCP 4.x clusters and MCO-based node customization.
• Manage certificates, ingress, and RBAC across namespaces and environments.
• Support application platforms and integration points (web services, MQ, API gateways).

Skills

RHEL administration

OpenShift / OCP

Security hardening

CI/CD understanding

Tools

Quay registry

Satellite server

Job description

Avensys is a reputed global IT professional services company headquartered in Singapore. Our service spectrum includes enterprise solution consulting, business intelligence, business process automation, and managed services. Given our decade of success, we have evolved to become one of the top trusted providers in Singapore and service a client base across banking and financial services, insurance, information technology, healthcare, retail, and supply chain.

We are currently looking to hire an TA and Platform Engineer (RHEL & OCP Specialist). This is an exciting opportunity to expand your skill set, achieve job satisfaction, and enjoy a healthy work-life balance. More details are below.

JOB TYPE

12 Months Contract

ROLES AND RESPONSIBILITIES

• 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

REQUIREMENTS

• 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

WHAT'S ON OFFER

You will be remunerated w