One of the big vendors is MicroFocus. https://www.microfocus.com/en-us/home https://www.microfocus.com/en-us/home Their variant of COBOL has a number of exten

One of the big vendors is MicroFocus. https://www.microfocus.com/en-us/home https://www.microfocus.com/en-us/home Their variant of COBOL has a number of extensions beyond the regular standard in GnuCOBOL. One that springs to mind is around data serialisation and file formatting. They also implemented an API layer for access from more modern stacks. Incidentally, if you're interested in getting into software development, I believe the DWP in the UK are still currently taking on apprentices to work on the COBOL-based systems in the department - I think they also get training in other languages too - perhaps JS, Ruby or Python?