I got the interview because of an on campus career day. Talked to them at the fair and was called back that same day and they asked if I could meet for an interview the next day. It was a 30 minute long interview, 2 interviewers and myself. It was very casual, I was in a suit, one of them was in slacks and a button shirt, the other slacks and a collard shirt. They asked me a few questions about myself, my work, and what kind of experience I had. There were no technical questions.
Then they asked if I had questions for them. My questions took about 7-10 minutes. We talked about Denver, the work area, and who they wanted for the job.