Platform Engineer

• Full lifecycle administration of ~222 Linux servers (production, QA, development)
• OS upgrades, patch management, and kernel updates
• Performance monitoring and system tuning (CPU, memory, disk I/O, network)
• User access management and authentication integrations (LDAP/AD)
• Backup validation and disaster recovery readiness

Kubernetes / OpenShift Platform Ownership

• Deploy, administer, and support Kubernetes/OpenShift clusters across environments
• Manage cluster lifecycle: installation, upgrades, patching, and scaling
• Configure and maintain:
• Namespaces, RBAC, and security policies
• Networking (CNI, ingress controllers, load balancing)
• Persistent storage (PVCs, storage classes)
• Support application teams with container deployments, troubleshooting, and performance tuning
• Monitor cluster health using tools like Prometheus, Grafana, and native OpenShift tooling
• Optimize cluster resource utilization and capacity planning
• Implement and maintain CI/CD integrations for containerized workloads

Security & Hardening

• Implement and maintain patching cadence across Linux and Kubernetes environments
• System hardening aligned to CIS/STIG best practices
• SELinux configuration and enforcement
• Firewall configuration (iptables / firewalld)
• Kubernetes security best practices (RBAC, pod security standards, image scanning)
• Support vulnerability remediation from tools (Tenable, Qualys, etc.)
• Log monitoring and audit review across infrastructure and containers

Incident Response & Production Stability

• Lead root cause analysis (RCA) for infrastructure and platform incidents
• Participate in on-call support for critical systems and clusters
• Resolve Sev1/Sev2 outages across Linux and Kubernetes environments
• Develop post-incident documentation and preventative controls

Modernization & Automation

• Assess and remediate deprecated platform components
• Standardize system and cluster configurations
• Build documentation and operational runbooks
• Drive infrastructure-as-code and automation initiatives (Ansible, Terraform, etc.)
• Support migration of legacy workloads to containerized platforms

UNIX & OS/400 (IBM) Support

• Administer UNIX environments (AIX/Solaris experience preferred)
• Support integrations with IBM i (OS/400) systems supporting Rail operations
• Ensure proper update and lifecycle management across platforms
• Maintain cross-platform data and system dependencies

• 5+ years hands-on Linux system administration experience
• 2+ years experience with Kubernetes and/or OpenShift administration
• Strong experience with Red Hat, CentOS, Rocky, or Ubuntu
• Experience managing large-scale environments (100+ servers and/or multi-node clusters)

Deep knowledge of:

• Linux internals (kernel tuning, systemd, process management)
• File systems and storage (LVM, XFS, ext4)
• Networking fundamentals (TCP/IP, DNS, load balancing)
• Containerization (Docker/CRI-O)

Kubernetes-specific experience:

• Cluster architecture and components (API server, etcd, scheduler, kubelet)
• Deployments, services, ingress, and Helm charts
• Logging and monitoring (Prometheus, Grafana, ELK)
• Troubleshooting pods, nodes, and networking issues
• Experience supporting Linux in virtualized environments (VMware preferred)
• Familiarity with SAN/NAS storage
• Strong troubleshooting across OS, container, network, and storage layers, * OpenShift platform experience (highly preferred)
• UNIX (AIX/Solaris) administration
• Experience with IBM i (OS/400)
• Infrastructure automation (Ansible, Puppet, Chef, Terraform)
• Experience with CI/CD tools (Jenkins, GitLab CI, etc.)
• Experience migrating legacy systems to Kubernetes/container platforms
• Certifications (RHCSA, RHCE, CKA, CKAD, Security+, etc.)
• Experience supporting rail, transportation, or industrial systems

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