W74 If you are looking to do a greensteam job then you do not have to have a lisence. If electrical and instruments you are looking to do then you will only be able to find a job in an overhaul shop. Most bigger companies will only employ I&E as apprentises, and being 30 and a pilot that leaves you pretty much out of luck unless you know people. I must agree with 30/30 if you are looking for a bit of a change until flying interests you again then you are looking at a very costly alternative.
All this being said I could be wrong and you could make a great ginger beer, I have been wrong in the past and im sure to be again
Best of luck