The first step was two assessments, one a test with a lot of percentage / profit type questions, and a IQ test (I like fast cars. True or False? etc.)
The interview was about 4 hours with two different people. First person was a lot of "tell me aboout a time..." Then I was given a half hour to look over a case study, then spoke with the second person about what I would do going into a job based on the case study, followed by more "tell me about a time" questions. We then took a quick tour of the department, and that was it.
About 4 hours total for the interviews.
About 3 weeks later I got the offer.