The interview process starts with HR over the phone, then a phone interview with the hiring manager to determine if you should come in. The in person interview is an all day, 8-hour, interview with multiple parties- hiring manager, other PIs in the dept/lab, associates you would be working with, etc. Depending on the size of the group, some interviews are with several people and some one on one. Lunch is provided in the cafeteria where you have a chance to eat with your prospective coworkers.