http://boardgamegeek.com/geeklist/182302/military-veterans-and-wargames-theyve-designed
They must of just started to compile that list. Some others:
Ben Hull (Fields of Fire)
Danny Holte (The Supreme Commander, others)
Jon Compton (One Small Step game publisher and designer)
ISTR Charlie Kibler telling me that he had served way back when but I don't recall the details.
Pete Shelling (ASL fame) is a Vietnam vet as I recall unless I'm confusing him with somebody else.
Steve Overton (our own "Mad Russian") is a vet and game designer
I'm sure that list will grow.
it's about 36 hours old at this point :)
at someone point, someone will add me, mark walker, brian train, joe miranda, and mark brown