Platform Engineer

Main Role 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

Support AWS administration tasks where applicable (CloudWatch monitoring, IAM, S3, hybrid integration)

Top 4 Must-Have Skills

RHEL System Administration (Required — Primary Differentiator)

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