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# Mainframe z/OS System Programmer

- **Company:** Kelly Services Inc.
- **Location:** Chandler, AZ, United States
- **Salary:** $104,000.0 - $130,000.0
- **Contract:** Permanent contract
- **Skills:** Customer Information Control System (CICS), CLIST, IBM DB2, Disaster Recovery, Rexx (Programming Language), Tivoli Management Framework, Interactive System Productivity Facility (ISPF), Job Entry Subsystem 2/3, Mainframes, Performance Tuning, IBM Resource Access Control Facility, Z/OS, Servicenow
- **Published:** August 11, 2026
- **Apply:** https://www.juju.com/job/00000000gmoa37

## About the Role

This position offers an opportunity to support highly available enterprise systems that power critical business operations. The successful candidate will work across operating system administration, performance optimization, automation, security, and infrastructure modernization efforts. Ideal candidates enjoy solving complex technical problems, driving platform stability, and working within large-scale enterprise computing environments. Required Skills & Experience

 + Experience administering IBM z/OS environments

 + Strong understanding of JES2/JES3

 + Experience with TSO/E, ISPF, and USS

 + Knowledge of RACF administration and security concepts

 + System performance analysis using RMF, SMF, and SDSF

 + Experience with operating system upgrades and maintenance

 + Root cause analysis and production troubleshooting experience

 + Experience supporting enterprise change management processes

 + Automation experience with REXX, CLIST, NetView, or SA z/OS

Desired Skills & Experience

 + Experience supporting DB2, CICS, IMS, or MQ environments

 + Capacity planning and performance engineering experience

 + ServiceNow experience

 + Disaster recovery planning and testing experience

 + Mainframe modernization project exposure

## Description

+ Maintain and optimize IBM z/OS operating environments

 + Implement upgrades, patches, and system enhancements

 + Monitor platform health and tune system performance

 + Support security and compliance initiatives

 + Develop and maintain automation solutions

 + Investigate and resolve infrastructure incidents

 + Participate in maintenance and deployment activities

 + Create and maintain operational documentation


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