3 interviews. 1) Standard HR screening. 2) Small panel interview: some light technical questions. You're basically given some scenarios and you talk your way through them with other researchers. They want to see what perspectives you bring in addition to some basic technical skill demonstrations. 3) Full day interview: Almost identical to full-day professorship interviews at universities. 9-5 with a one-hour seminar you give to a large group of researchers. They ask lots of questions during the talk--feels like an academic seminar. You meet with your primary contact, department manager, various researchers, and the division director. There is also a one-hour panel interview that involves more case studies and general Q&A for the prospect. The full-day interview is grueling due to its length, but the questions are not difficult, they are mainly about your research (which you'll obviously know well) and also seeing if you are interested in the work they do. I asked a lot more questions than they asked of me.