A Cobol IDMS job involves working with COBOL programming language and IDMS (Integrated Database Management System), a network database management system used on mainframe computers. Professionals in this role develop, maintain, and optimize applications that interact with IDMS databases. They typically perform tasks such as writing COBOL programs, debugging, database administration, and performance tuning. This role is common in industries that rely on legacy systems, such as banking, insurance, and government agencies. Knowledge of JCL, CICS, and SQL is often beneficial for this job.