Senior z/OS Platform Engineer (Mainframe), Chicago IL

McMaster-Carr
Elmhurst, IL (Chicago area) Full-time Jul 17, 2026 z/OSmainframeCICSDB2Illinois
$235,000–$310,000 total cashper year

About the role

McMaster-Carr — the industrial-supply company that manufacturers have relied on for over 120 years — runs its e-commerce and distribution operations on the mainframe, and is hiring a Senior z/OS Platform Engineer to keep that platform fast, resilient, and efficient. This is a hands-on infrastructure role for someone who wants to work at a marquee end-user shop rather than a consultancy, on-site in the Chicago area.

Responsibilities

  • Support CICS and Db2 subsystems and apply ongoing system maintenance
  • Write code to improve the availability, resiliency, and efficiency of mainframe software and systems
  • Handle a broad range of mainframe infrastructure tasks, including physical hardware replacement
  • Analyze application, resource, and system data to optimize cost
  • Grow the team's technical depth through learning groups and mentoring

Requirements

  • 3+ years of experience with z/OS, CICS, Db2, JCL, SMP/E, SMS/ACS, networking, z/OSMF, and Zowe
  • Strong analytical problem-solving and technical design skills
  • Clear communication with both technical and non-technical audiences
  • Interest in mentoring and building leadership skills

What we offer

  • Medical, dental, pharmacy, and vision with no premiums
  • Company-funded retirement accounts
  • 100% tuition reimbursement and mentorship
  • Paid parental leave, plus adoption, surrogacy, and first-time-homebuyer assistance
  • Paid vacation and personal time
  • Relocation stipend and signing bonus
$235,000–$310,000 total cash per year Apply now