I left after 27 years in 2003, as a Flight Operations Manager who was finally bitten to death at the home of the then JFH.
The RAF equipped me with life skills a plenty, I wanted nothing to do with aircraft but within two years was a Benefits Manager for a large Borough Council. Im back with my aircraft now at Qantas and loving it but you have all the skills you need to succeed. You have to pick the career path though, no one can do that for you.
All my "civvie" bosses love ex-military men, we are taught to be at a certain place at a certain time and we get the job done whatever. They love that.