I don't want to rain on your parade but there is a cool thread here on just this subject:
I want to start a thread about what jeep lovers do for living
Than being said, when I posted there I basically wrote I couldn't decide on what to put down.
At first I was going to say I make bombs but that didn't sound good and I figured I'd be getting a call from the ATF.
Then I was going to say I assembled surface to air missiles but I figured that would flag Homeland Security.
I'll just say I work for a defense contractor and leave it at that.