Qualifications and Responsibilities for zOS System Programmer: Install, upgrade, and customize IBM z/OS and subsystems (JES2/JES3, RACF). Perform system tuning, capacity planning, and performance monitoring. Troubleshoot and resolve system issues to minimize downtime. Implement security policies and ensure compliance with standards. Collaborate with application and infrastructure teams for seamless integration. 5+ years of experience in z/OS systems programming. Strong knowledge of SMP/E,