Mainframe Engineer

Responsibilities: Plan and execute z/OS upgrades, maintenance, and migrations. Install, configure, upgrade, and troubleshoot ISV and system software. Manage HMC, LPAR, I/O, HCD/IOCP, and WLM configurations. Monitor and tune system performance and resource utilization. Maintain critical datasets including SYSRES, page, and SMF datasets. Diagnose and resolve complex z/OS, JES, workload, and ISV issues. Support automation, monitoring, vendor escalations, and enterprise operations. Participate in DR planning, GDPS activities, IPL testing, and recovery events. Provide 24x 7 production support as part of an on-call rotation.

Required Skills: Strong hands-on experience with z/OS installation, configuration, maintenance, upgrades, and migrations. Experience with IBM PTFs, APARs, SMP/E, IPLs, and system maintenance. Expertise with IBM Z hardware, including CPC, LPAR, HMC/SE, HCD/IOCP, IOCDS/IODF, FICON, OSA, and Coupling Facility. Experience with WLM, JES2, RMF, SMF, TMON, and SAS. Installation and support of Broadcom/CA, BMC, IBM, and Rocket Software products. Knowledge of OPS/MVS, System Automation, Automation Point, and ZEKE Scheduler. Experience with GDPS, disaster recovery, replication, and IPL/DR testing. Strong troubleshooting skills using system logs, SYSOUT, dumps, and diagnostic data. Experience supporting 24x 7 production environments and on-call rotations.