Senior z/OS Platform Engineer

Full Timesenior

Chicago, IL (Elmhurst)Posted 22 days ago

Role Overview

Mcmastercarr is hiring a Senior z/OS Platform Engineer. This is a full-time role in Chicago, IL (Elmhurst). Part of Mcmastercarr's Lifecycle hiring, posted 3 weeks ago. Full responsibilities, required qualifications, and the apply link are listed in the description below.

Salary Context

Salary is not disclosed in this posting. Market median for Senior-level Lifecycle roles is $130k-$185k (based on 33 comparable listings). Many employers share specifics during the interview process or after an initial screen.

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Job description

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.

What You'll Do
As a Senior z/OS Platform Engineer you will:

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.

Who You Are
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.

Cash Compensation

Total cash compensation is generally around $235,000 to $310,000 and includes a profit sharing based on company profitability.
You will also receive a relocation stipend and signing bonus.

Benefits

Growth & Learning

100% tuition reimbursement
Informal and formal mentorship
Employee resource groups

Health & Wellbeing

Medical, dental, pharmacy, and vision plans with no monthly premiums
Inclusive, all-gender benefits

Family & Future

Paid parental leave for all new parents
Adoption and surrogacy assistance
First-time home buyer assistance
Industry-leading company-funded retirement accounts

Time Off

Paid vacation and personal time

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.

About Mcmastercarr

Mcmastercarr

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Frequently Asked Questions

How do I apply for the Senior z/OS Platform Engineer position at Mcmastercarr?

Use the Apply button above to submit your application directly to Mcmastercarr. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.

Where is the Senior z/OS Platform Engineer position at Mcmastercarr located?

This position is based in Chicago, IL (Elmhurst). Mcmastercarr has not indicated remote or hybrid options for this role, so candidates should plan for on-site work.

What does a Senior z/OS Platform Engineer at Mcmastercarr earn?

Mcmastercarr has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.

When was the Senior z/OS Platform Engineer role at Mcmastercarr posted?

This role was posted on June 17, 2026 (22 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.

How much experience does the Senior z/OS Platform Engineer role at Mcmastercarr require?

This is a senior-level position. Most senior roles call for 5+ years of directly relevant experience. Mcmastercarr lists their specific requirements in the description below, so review the must-have qualifications closely before applying.