The good news is that the interview with ATK went very well and I enjoyed talking intelligently with other engineers. The interview was in Plymouth, MN which is about 25 minutes north of my house in Bloomington.
The bad news is that the ATK office here does pretty much all ammunition and missile development, essentially nothing space-related. There are about 5 people devoting at least part of their time to working on the Ares rocket for the Constellation program for travel to the Moon and beyond. They are not hiring for that and it sounds like there is no chance of me working on that. Once I hear back from ATK I am going to ask again about the possibility of me doing anything with Ares.
I don't really want my job to be about blowing stuff up. I might consider that if there was potential for space work in the future but it doesn't look good.
I will write more about this once I hear back from ATK.