Mainframe Systems Programmer (IMS)

Overview

In this role you maintain and optimise IMS environments to ensure performance, stability, and resilience of core mainframe systems. You will support high-availability operations, resolve complex incidents, and collaborate with cross-bank teams while driving modernization and automation initiatives. You contribute to risk management and compliance while applying disciplined change control. This position offers opportunities to shape mainframe infrastructure in a large, security‑driven financial context.

Responsibilities

• Build, maintain and optimise infrastructure solutions to meet reliability and performance targets.
• Monitor and respond to IT infrastructure performance to prevent outages and reduce incident MTTR.
• Develop automated tasks and processes to improve efficiency and reduce manual work.
• Implement secure configurations and protect infrastructure from threats and unauthorised access.
• Collaborate with product managers, architects, and engineers to align IT infrastructure with business objectives and data-driven decisions.
• Stay informed on industry trends and contribute to technology communities to foster technical excellence.

Key requirements

• Ample knowledge of IMS DB/DC, z/OS, JCL, system utilities, and mainframe infrastructure
• Ability to diagnose multi-faceted production issues, perform root-cause analysis, and restore service quickly in a high-availability environment
• Experience implementing changes safely, maintaining system stability, and ensuring performance and resilience
• Knowledge of Assembler with user exits is advantageous
• Ability to improve efficiency through scripting, job automation, monitoring, and process optimisation
• Understanding of the IMS Catalog and IMS Managed ACB concepts
• Strong risk and controls awareness and ability to couple change with governance

• team collaboration
• problem solving
• stakeholder communication
• IMS DB/DC
• z/OS
• JCL

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