Senior z/OS Systems Programmer - Mainframe Modernization

Job Description

Senior z/OS Systems Programmer - Mainframe Modernization

We’re looking for an experienced z/OS Systems Programmer to join a global financial services organization and play a key role in a major Mainframe modernization program.

This is an excellent opportunity to work across business-critical IBM Mainframe platforms, combining deep z/OS expertise with modern tooling, automation, and platform transformation initiatives. You’ll be part of a complex, enterprise-scale environment where reliability, performance, and innovation are equally important.

The Role:

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• Install, configure, and maintain z/OS system software and core Mainframe subsystems.
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• Lead and support system upgrades, patching, maintenance, and performance optimization.
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• Investigate and resolve complex Mainframe system issues.
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• Contribute to platform migrations, integrations, and wider modernization projects.
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• Ensure systems meet security, compliance, and regulatory requirements.
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• Collaborate with infrastructure, engineering, and application teams to deliver robust, reliable solutions.
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Experience:

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• Extensive experience working with IBM z/OS Mainframe environments.
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• Strong knowledge of core z/OS components and subsystems, including JES, SMP/E, and TSO/ISPF.
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• Solid JCL experience, alongside Mainframe automation and scripting tools such as REXX, CLIST, or equivalent.
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• Proven ability to install, configure, upgrade, and maintain Mainframe system software and utilities.
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• Experience with third-party Mainframe tools and vendor products, including monitoring, storage, scheduling, or performance management solutions.
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• A proactive approach to troubleshooting, platform reliability, and continuous improvement.
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Please apply as soon as possible if you’re interested in exploring this opportunity. We’d love to hear from you.