I got the interview through a personal contact. The interview consisted of multiple one on one interviews with staff members, a "job talk" (i.e. formal presentation of your research), a lunch, a panel discussion with multiple staff members asking you questions, and finally a meeting with the division director. I was at their campus for about 8 hours. Everyone is genuinely nice and extremely professional, but they clearly take HR decisions very seriously and will bore down into your strengths and weaknesses with a high degree of accuracy and candor. I personally think is admirable and reflects an organizational focus on getting the right kind of person, but some may find it intimidating. There was a particular focus on cultural fit and methodological tools. Be prepared to talk about your weaknesses. I received an informal offer a three weeks later and a formal one a week after that. In terms of timeframe, that's definitely slower than the private sector but far faster than government. All in all, a very fair and positive process, and I'm excited to be joining them.