To thrive as a Mainframe Support professional, you need a solid understanding of mainframe operating systems (such as z/OS), basic programming skills, and troubleshooting abilities, typically supported by a degree in computer science or equivalent experience. Proficiency with tools like IBM ISPF, SDSF, JCL, and familiarity with monitoring and batch processing tools, as well as certifications like IBM Certified System Administrator, are often expected. Strong analytical thinking, communication, and teamwork skills are crucial for effectively addressing technical issues and collaborating with cross-functional teams. These abilities ensure prompt issue resolution and maintain the stability and reliability of critical business systems.