Mainframe Specialist H/F Hays

We are looking for an experienced Mainframe Systems Engineer to join our client's team and ensure the stability, security, and performance of mission-critical environments.

You will be responsible for managing and optimizing z/OS, CICS, IBM MQ, and IMS subsystems, while driving automation and compliance in a high-availability setting.

Key Responsibilities:

* Install, configure, upgrade, and maintain z/OS, CICS, IBM MQ, and IMS software in line with enterprise standards and lifecycle best practices.
* Apply PTFs and APARs, manage patching and tuning to keep systems secure and up-to-date.
* Troubleshoot and resolve complex infrastructure issues, including dump analysis, performance tuning, and escalated incident support.
* Customize subsystem parameters and manage regions, started tasks, queue managers, and address spaces for CICS, MQ, and IMS.
* Automate operational tasks using JCL, REXX, and CLIST for monitoring, administration, and recovery.
* Collaborate with application, database, and network teams to ensure seamless integration of middleware and core platform components.
* Implement robust security and compliance measures (e.g., RACF, SOX, PCI-DSS).
* Participate in disaster recovery drills and infrastructure tests to maintain business continuity.
* Maintain accurate documentation for system configurations, procedures, and change management activities.