I applied before the career fair at K-State in the fall. They hosted a meet and greet ice cream social the evening before the on campus interview. That first interview was 30 minutes and strictly behavioral based so situations and how I handled it. Felt slightly negative at first with questions leaning towards times I failed, needed help from pier, and just topics that were not very happy or fun. Next set of interviews were at Koch's headquarters in Wichita. Consisted of back-to-back 30 minute interviews with people in the IT department so slightly more related to the field and skills but still very situational based. These interviews were more conversational and more enjoyable than the first. We were told at the beginning of the day that we had been selected as the top 20% and that these interviews were less weeding out and more seeing where we would fit best. HQ was a great place to interview and see the work environment.