We had an RCA xfer to the Clerk side.
He made a deal with PM that he could go straight from RCA on Friday to PSE on Saturday.
All was fine and dandy for a few weeks, but lo and behold, he had to 'quit' for five days as an RCA and then get re-hired back on as a PSE.
Which was a scary proposition for him, waiting for them to hire someone else into the spot instead of re-hiring him as promised.
He does like it a lot more on the PSE side, says it is way less stressful and to pretty much know your schedule for the week is absolutely amazing to him!
he was low on the RCA totem pole so did not lose much seniority, didn't care as he wanted more stability and more hours and is getting that on the clerk side.
So bottom line is, talk to your hiring supervisor, if they will hire you on, then work out the details, but know you will have to 'quit' to get the PSE job.
Good luck in your decision.