If you have any spare time, now or in the future, consider offering some of it to an ATC squadron. They are the future, as the recruiting stats show.
You don't have to turn up twice a week and teach - join their civilian commitee, probably four meetings a year; wangle some favours from your friends in the right places to get them trips and visits; help them with your Service-learned skills of leadership, teaching and having a good time in adversity.
I've done some of the above, and spent a couple of parade nights helping them put together a presentation about their activities - they gave it to an audience of 50 odd last night, and all I heard afterwards were good things about their enthusiasm and turn-out.
You might even have fun
I should add that you don't have to leave the Services before volunteering - we have four JRs/NCOs from the secret Oxon RW airbase who come and help, often.