I made my way up the ladder across a number of jobs - school technician, university networking, commercial sector sysadmin & net eng, senior role of that one (management!), sideways move after a takeover into a 'roving specialist' role which I loved, then back into higher ed as a technical manager because that is "the thing to do" as you get older.
After years of not being allowed to recruit to replace leavers/movers I had less than half the team I'd had and became acutely aware of the fact that I (a) didn't have time to do the paperwork and (b) hated doing it. I became "The Peter Principle" in person.
Thankfully due to a wise senior manager I got moved into another team, no management responsibility, now I can do tech work again and enjoy it. I have no intention of ever being in management again.
I do feel sorry for my colleagues in Manchester though.