Senior z/OS Platform Engineer

Who We Are

McMaster-Carr is a leading e-commerce company that industrial customers have trusted for over 120 years. Our products help them get manufacturing lines back up quickly, keep operations running smoothly, and prototype the next generation of innovative solutions. We earn and keep that trust by offering the right products, making them easy to find, and delivering them fast, so our customers can solve problems with greater speed, precision, and ease.

Our industry-leading e-commerce experience, indispensable product selection, and world-class service bring hundreds of thousands of customers to our site each day. But we’re never standing still. Our curious, exceptional people are at the heart of our evolution. They turn new challenges and disruptive technologies into opportunities to refine our operations, expand our offering, and deliver a better experience for every customer.

How You'll Make An Impact
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.

• 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.

Equal Opportunity Employer

We are proud to be an Equal Opportunity Employer and dedicated to providing employees a workplace with reasonable accommodations and free of discrimination, harassment, and retaliation. At McMaster-Carr, we do not make employment decisions based on age, ethnicity, citizenship status, military status, gender identity and expression, race, religion, disability status, marital status, sexual orientation, or any other legally protected group.

This position is not eligible for work authorization sponsorship by McMaster-Carr.

Data We Collect

We may collect professional, education and employment-related data, and any assessments made throughout the recruiting process, to evaluate candidacy for employment. To communicate with job applicants, we may collect applicant names, contact information, and other personal identifiers, including those outlined in the California customer records statute. Through voluntary disclosure, we may also collect protected classifications under federal or California law (e.g., race, gender, etc.). For additional details about the personal information we collect and its uses, please click here.