Senior Mainframe Systems Programmer – Onsite

Stefanini North America and APAC

Dearborn (MI)

On-site

USD 120,000 - 170,000

Full time

3 days ago

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Job summary

Stefanini North America and APAC is seeking a skilled Mainframe Programmer for an onsite role in Dearborn, MI. You will design, operate, and maintain enterprise mainframe environments, including z/OS and IBM systems, with a focus on performance, security, and reliability.

You will work with ISV products, ISPF/TSO/JCL, and modern monitoring tools, providing tiered support and disaster recovery readiness. Strong communication and problem-solving abilities are essential for this hands-on,

Qualifications

10+ years in IT and 8+ years in development.
Mainframe systems expertise.
Experience with JES2/JES3 and z/OS internals.

Responsibilities

Design, operate, and maintain enterprise servers including mainframes.
Research and implement complex infrastructure solutions for internal needs.
Design secure virtualized environments with VMs, networks, and storage.
Develop or use monitoring tools to ensure secure, efficient operation.
Monitor CPU, memory, storage and network usage to optimize resources.
Plan capacity and advise on future blueprints with EA teams.
Install and support ISV products and work with vendors on issues.
Code in Assembler for system modifications and JES exits.
Debug z/OS software problems and support USS/WebSphere.
Interface with IBM support via ServiceLink; proficiency in Assembler, REXX, CLIST and SAS.
Knowledge of RACF and RACF profiling.
Provide system-programming support for mainframe installations and upgrades.
Provide off-hours DR planning/testing support.
Handle trouble tickets at levels 1–3 for customers.