z/OS Specialist

Role z/OS Systems Hardware Specialist

Location Sheffield, UK (hybrid)

Start Date - ASAP

Duration - A minimum of 6 months

Contract inside IR35

Role Overview
We are looking for an experienced z/OS Systems Hardware Specialist to support and maintain Mainframe Processor operations within a multi-LPAR, multi-site Sysplex environment. The role involves hardware maintenance, system upgrades, troubleshooting, and performance optimization to ensure high availability and efficiency.

Key Responsibilities

• Mainframe Hardware Support & Maintenance:
• Oversee the UK Mainframe Processor estate in a multi-LPAR Sysplex environment.
• Troubleshoot and resolve day-to-day hardware incidents and system failures.
• Processor & Microcode Upgrades:
• Lead upgrades of IBM Mainframe Processors to the latest generations (z14, z15, z16).
• Upgrade Microcode levels on Mainframe Processors, Coupling Facilities, HMCs, and TKEs.
• System Configuration & Optimization:
• Build and activate IODF/IOCDS configurations for storage and system updates.
• Update PR/SM definitions via HMC.
• Collaboration & Risk Management:
• Work closely with cross-functional teams to ensure system efficiency and reliability.
• Maintain compliance with risk management and regulatory processes.
• Out-of-Hours Support:
• Provide after-hours support for critical hardware implementations and upgrades.

Required Skills & Experience

• Extensive experience in Mainframe hardware support and configuration.
• Strong knowledge of IBM z/OS systems and tools, including:
• HMC, HCD, TSO/ISPF, SDSF, JCL, CHPID Mapping Tool, JES2.
• Hands-on experience with IBMz processor generations (z14, z15, z16).
• Sysplex and Coupling Facility expertise.
• Excellent troubleshooting and problem-solving skills.
• Effective communication skills, with the ability to explain complex technical concepts to a broad audience.

Preferred Skills (Not Mandatory But Advantageous)

• Automation, GDPS, Rexx, and CLIST Scripting.
• OSA-ICC definition and configuration.
• Basic understanding of DWDM technology.
• Familiarity with Disk/Tape infrastructure.