Mainframe Systems Engineer

Z/OS Systems Programmer Exp. Range: 9 to 13 Years Location-Chennai

What does a successful Mainframe System Engineer do? A successful Mainframe System Engineer at Fiserv ensures the availability, reliability, and performance of z/OS environments that support critical client workloads. You will execute z/OS and ISV product upgrades, maintain SMP/E workflows, collaborate with application and vendor teams, and drive continual improvements to mainframe operations. Your work enables business continuity and meets contractual support obligations.

What you will do: Perform z/OS OS and ISV product upgrades and maintenance using SMP/E and z/OS workflows. Configure, install, and maintain mainframe system software and vendor products; execute SMP/E and non‑SMP/E installs. Troubleshoot and resolve system issues across JES2, JCL, IBM utilities, USS and Parallel Sysplex environments. Lead performance tuning, capacity planning, storage management and hardware migration activities. Coordinate with vendors and application teams for upgrade planning, testing, and successful production cutovers. Produce and approve system documentation, runbooks, test plans, and configuration notes. Mentor system programming staff, run technical working sessions, and contribute to modernization efforts (Zowe/Open Mainframe).

What you will need to have: 8+ years of experience in z/OS system programming and SMP/E-based installations. 8+ years of experience in performing OS and ISV product upgrades and compatibility maintenance. 8+ years of experience with JCL and IBM utilities (IEBGENER, IEBCOPY, AMASPZAP, DFDSS) and JES2 initialization. 8+ years of experience with Unix System Services (USS) and mainframe storage/backup utilities. Bachelor’s degree in Computer Science, Information Technology, or a related field, and/or equivalent military experience.

What would be great to have: 8+ years of experience with Parallel Sysplex, z/VM, and sysplex configuration management. 8+ years of experience with REXX/CLIST scripting and automation for mainframe operations. 8+ years of experience in performance tuning, capacity planning and workload optimization on z/OS. 8+ years of experience with modern mainframe toolchains (Zowe, Open Mainframe) and CI/CD integration. 8+ years of experience coordinating ISV/vendor upgrades and vendor change lifecycle management.