HEDP,
I came out of the Mil 15 years ago and walked straight into an oilfield support job with one of the (then) big 3 out of Aberdeen, but there doesn't seem to be the demand there once was, plus they do all sorts of tests to make sure you're not mad nowadays.
Unless you want to use your Mil background for Police/HEMs or the like, that's where the money is.
3800 hours should be enough to get you in as a Captain LHS and on the waiting list for a Command. No idea how long that would take with the (now) big 2.
Good Luck with the exams
NEO