Mainframe z​/VM & Linux

Responsibilities

• z/VM Administration
  :
  Install, configure, and maintain IBM z/VM systems; manage lifecycle of virtual machines (guests) – provisioning, scaling, and decommissioning; administer z/VM components such as Dir Maint, VMSES/E, and RACF for z/VM security; apply system maintenance (RSUs, PTFs, APARs, and service updates); perform system IPLs and hardware configuration updates via HMC.
• Linux on Z Administration
  :
  Install, configure, and maintain Linux distributions on IBM Z (RHEL, SUSE, Ubuntu); support deployment and management of Linux workloads on z/VM; ensure system stability, performance, and security compliance; perform patching, upgrades, and vulnerability remediation; manage file systems, storage, and network configurations.
• Operations & Support
  :
  Monitor system performance and availability (CPU, memory, I/O utilization); monitor workload performance and capacity; troubleshoot and resolve system issues (performance bottlenecks, VM failures, Linux system errors); analyze logs and system metrics to ensure operational stability; provide L2/L3 support for production environments.
• Automation & Integration
  :
  Automate provisioning and operational tasks using REXX, Shell scripting, and Python (preferred); support Dev Ops and integration initiatives such as CI/CD pipelines; assist application teams with deploying workloads on Linux on Z; optional support for container platforms (Docker, Kubernetes).
• Security & Compliance
  :
  Implement and maintain security controls, including RACF integration for z/VM and Linux OS hardening; ensure compliance with enterprise standards and audit requirements; support vulnerability management and patch remediation.
• Governance & Documentation
  :
  Maintain system documentation and configuration records; ensure changes follow ITIL/Service Now change‑management processes; support disaster‑recovery planning and execution for z/VM and Linux systems.

• Required Experience
  :
  Strong experience with IBM z/VM (z/VM 6.x / 7.x) and Linux on IBM Z (RHEL, SUSE, Ubuntu); hands‑on experience with virtual machine provisioning and management, VM directory management (Dir Maint), and system maintenance (RSUs, APARs, VMSES/E); knowledge of HMC operations and IPL processes, storage (DASD) and networking on z systems; strong troubleshooting skills across z/VM system issues and Linux OS performance and configuration.
• Preferred Experience
  :
  Knowledge of Sysplex, networking, and storage integration; experience with monitoring tools such as Grafana or OMEGAMON; automation tooling (Ansible or scripting) experience; exposure to cloud integration/hybrid environments and container workloads on Linux on Z.

We welcome people of all cultures, backgrounds, and experiences.