Maintain and gradually unpick the mainframe applications that still run core client processes.

Rijnmark maintains mainframe estates for clients who cannot replace them yet, and helps them plan the exit. Both halves of that are interesting, and the work is not going away. You will read, change and test COBOL on z/OS with DB2 and CICS, and document what you find as you go, because the documentation is the migration plan. Training is provided if you come from another language. We hire career switchers into this role deliberately. Temp-to-hire over twelve months, Utrecht, and a scarcity in the market that works in your favour.

COBOL Developer