To be honest I don't think it's much different in the engineering world. The Officers move on every two years, and can do a first line tour, followed by MT, or IPT perhaps. Possibly Eng Ops or some other non-aircraft job. They too have to try and make a mark within those two years, and are constanly on the lookout for the next rung on the ladder. I doubt the Supply Officers view movements any differently to the way an Engineering Officer views some of the Eng postings.