Mainframe System z HCD Specialist

About the role

Location: Remote. The HCD Specialist is a critical infrastructure role responsible for the definition, maintenance, and dynamic reconfiguration of IBM System z I/O configurations. You will ensure the stability and performance of mainframe environments by managing Input/Output Definition Files (IODF) and associated hardware definitions.

Responsibilities

• Configuration Design: Design and implement I/O configurations for z/OS environments, including processors, channels, control units, and devices.
• IODF Management: Create, update, and manage Input/Output Definition Files (IODF) to reflect changes in the hardware environment.
• Dynamic Reconfiguration: Plan and execute dynamic I/O configuration changes without disrupting the production mainframe environment.
• Hardware Integration: Collaborate with storage, network, and hardware engineering teams to integrate new storage arrays, FICON/ESCON channels, and other peripherals into the mainframe environment.
• Troubleshooting: Analyze and resolve configuration-related issues, including device allocation errors, I/O path issues, and hardware definition conflicts.
• Documentation & Compliance: Maintain comprehensive documentation of system configurations and ensure all changes adhere to enterprise change management processes and security policies.

Requirements

• Deep z/OS Expertise: Solid understanding of z/OS architecture, I/O subsystem concepts, and IBM mainframe hardware (z/Series).
• HCD Proficiency: Extensive experience using the Hardware Configuration Definition (HCD) tool and, preferably, the Hardware Configuration Manager (HCM).
• Core Concepts: Practical knowledge of IODF/IOCP/IOCDS generation and management.
• Troubleshooting: Strong analytical skills to diagnose and resolve complex I/O and hardware definition issues.
• Collaboration: Ability to work effectively with cross-functional teams including Storage Administrators, Network Engineers, and Systems Programmers.
• Certifications: IBM Certified Systems Programmer or equivalent practical experience is highly desirable.