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# Senior z/OS Platform Engineer

- **Company:** McMaster-Carr Supply Company
- **Location:** Chicago, IL, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Customer Information Control System (CICS), COBOL (Programming Language), IBM DB2, Job Control Language (JCL), Z/OS
- **Published:** November 8, 2026
- **Apply:** https://www.juju.com/job/28_25303_22504f7ca731862265a4211b09fb81ad

## About the Role

We're looking for curious, driven engineers who thrive in collaborative environments and love solving hard problems. Ideal candidates will have:

 * At least 3 years of experience with technologies such as z/OS, CICS, Db2, JCL, SMP/E, SMS/ACS, Networking, z/OSMF, and Zowe.
 * A thoughtful, analytical approach to problem-solving and technical design.
 * Clear, confident communication skills across technical and non-technical audiences.
 * Interest in mentoring, coaching, and growing as a leader.

## Description

Our technology team builds the software that powers our e-commerce experience and our world-class operations. From customer-facing web features to distribution center automation, we design and scale critical systems that enable McMaster-Carr to deliver same-day or next-day orders reliably and efficiently. As a Senior z/OS Platform Engineer, you'll work on projects like:

 * Re-imagining our COBOL development lifecycle, incorporating VSCode, Zowe, and CI/CD pipelines.
 * Designing and transitioning to a new data layout for critical subsystems to meet recovery time objectives.
 * Upgrading DB2 and other fundamental platform components with comprehensive assessment of dependencies and robust risk mitigation practices.
 * Detecting and analyzing trends in z operations to optimize resource use and development velocity., * Perform a broad range of mainframe infrastructure tasks, including supporting CICS and Db2 subsystems, applying system maintenance, and replacing physical hardware.
 * Write code to enhance the availability, resiliency, and efficiency of mainframe software and systems that bring value to customers.
 * Leverage application, resource, and system data to drive down costs and support company goals and strategies.
 * Build technical knowledge through learning groups, book clubs, and one-on-one mentoring.