I had one phone interview about 20 minutes long. Short and to the point, asking about my experience with different methods, what I currently did at my job, and my education experience. (Had a situation come up and was forced to do this interview in a McDonalds parking with traffic coming by honking horns etc., not a great start haha) I was contacted about 10 days later for a in person interview. This interview was originally scheduled for 1.5 hours with three different 30 min sessions. When I arrived I was told one of the interviews was being removed due to a schedule conflict so it would only be 1 hour with two 30 min sessions. First session was 3 people right around the level I would be applying for. Asked about experiences and what type of worker I was. Casual and open style of interview with few planned questions asked. Second session was 6 of the technical leads/principle scientist including the director, by far the largest and most intimidating initial interview experience I had been through. A 6 on 1 interview and they were all high level scientist and managers! Plus the agenda I was following mentioned 4 people in the second group, not 6. I was very nervous but they were very friendly and surprisingly casual as well. More planned questions but overall just trying to get a gauge on how your personality will blend with the current group as communication is a big key to success in development work. Overall good experience with friendly people, just a little unorganized.