Four interviews. First was a basic, "Do you know who we are and what we do?" sort of interview. Second was a very standard 'behavioral' type interview. Third and fourth, you're brought in to spend some time with an executive-level employee to do a more general, broad-ranging interview.

Very standard interview process, typical of the industry. There are several rounds of interviews: 1st is with HR to go through your experience, academic background and interests. There are also some behavioral questions. 2nd is with a member of the workforce you are being considered for: You will most likely interview with a Manager and questions are very specific to job experiences. There may be some cases in this stage as well. 3rd is also with a member of the workforce, a more senior one in this case (likely a Senior Manager, but can also be a Managing Director). The interview itself is pretty similar to the 2nd interview. If you pass these rounds, you get invited for an office visit (expenses paid) where you'll meet with several individuals that will assess your fit with the organization.