I'm familiar with a federal facility that does a lot of safe lock-outs.
People get re-assigned, move, etc and the combos (which are supposed to not be written down) aren't available.
The safe techs don't manipulate, at least not to my knowledge.
They drill mostly, but with the electronic X-09 or X-07 locks they do a brute force attack; large diameter drill to open up the face plate then sawing through the locking bars.
It's not pretty.