Apogee Global RMS is looking for a Senior Mainframe Systems Programmer who will be responsible for installing, configuring, maintaining, and optimizing z/OS mainframe environments that support mission‑critical enterprise workloads. This role requires strong technical ownership, deep understanding of IBM mainframe subsystems, and the ability to ensure high availability, performance, and security across complex infrastructure.

Key Responsibilities:

Core Systems Programming

• Install, customize, and maintain z/OS and related IBM subsystems.
• Manage SMP/E, system upgrades, patching, and maintenance cycles.
• Configure system parameters, parmlib members, exits, and JES2/JES3 environments.

Subsystem & Middleware Support

• Support and tune core components such as VTAM, TCP/IP, RACF, DB2, CICS, IMS, MQ, or equivalent.
• Troubleshoot subsystem performance, avai...