To thrive in an IRS COBOL role, you need strong expertise in COBOL programming, mainframe systems, and experience with legacy application maintenance, often supported by a degree in computer science or a related field. Familiarity with IBM mainframes, JCL, DB2, CICS, and knowledge of IRS tax processing systems or similar government platforms is highly valuable, along with any relevant security or programming certifications. Excellent analytical thinking, attention to detail, and clear communication are important soft skills that help with troubleshooting and collaborating in multidisciplinary teams. These qualifications ensure the reliable management and modernization of critical financial or tax-related systems crucial to the IRS's operations.