It is often when new recruits are hired that although they are trained on the new processes and procedures (which takes time) they will still have their intuition informed by what they did in their previous jobs.
In fact, people will have a predilection to follow the old ways until new neurological paths are created and strengthened by repeated practice.
Until that happens the risk of doing the wrong thing persists and why training and testing need to happen often during employee transitions particularly for safety critical positions.