I applied through my campus career center and my first interview was on-campus. There was a get-to-know-you mixer the night before where I met my interviewer, which led to a much more-relaxed interview, as we had already met. It only took one day to hear back that I had been selected for the next round of interviews in Wichita.
My second-round interview was a week later and began with another mixer the night before the interview where I met a young Koch employee who was to be sort of my "buddy" throughout the interview process. The next day I met with him again and he essentially took me to and from my interviews and showed me around the building.
The questions were typical interview questions- nothing technical or too difficult. There are a few interesting questions that allow the interviewer to see how well you critically think. Just make sure to be on your toes and conversational with the interviewer(s).
I received and accepted an offer about a week and a half after my second-round interview.