You could get a job as a Base Tech. If you do, you could maybe progress to offshore ROV later on if you feel you might enjoy it.
Watch out in the P&J for base tech jobs, look up all the big players in Aberdeen – Sonsub, Oceaneering, Technip, Fugro, Canyon, etc. yopu know how many base themselves in Aberdeen!
What about one of the equipment hire companies, Ashtead, Seatronics? Consider work on survey side as well as ROV as again people have moved from Survey to ROV (plus most ROV companies have a survey side as well)