We are seeking an experienced Mainframe Systems Programmer / zOS Operations Engineer to support a large enterprise IBM z/OS environment across Production and QA systems.

This role is responsible for daily system operations, IPL support, HMC administration, change windows, emergency response, and software upgrades.

Key Responsibilities

• Perform daily health checks of LPARs, started tasks, VTAM nodes, and JES spool utilization
• Monitor system resources (CPU, JNUM, JQES, BUFX) and resolve performance issues
• Support batch job management, priority adjustments, initiator changes, and task recycling
• Lead and support Sunday IPL / change window activities, including PORs, PARMLIB updates, and Coupling Facility maintenance
• Create and maintain IPL run sheets / SOP documentation
• Manage HMC operations, LPAR profiles, capacity changes, STP, SOFTCAP, and Capacity on Demand
• Support MQ, DB2, CICS, zOS Connect, and other critical started task recycling outside IPL windows
• Execute emergency dumps, system restores, failovers, and outage recovery procedures
• Support z/OS software upgrades and hardware refresh activities

Required Experience

• Strong hands-on experience with IBM z/OS mainframe administration
• Expertise with LPARs, IPLs, PORs, HMC, JES, VTAM, DB2, MQ, and CICS
• Experience supporting enterprise change windows and production incident response
• Strong troubleshooting and system recovery background