I was recruited through a hiring manager from linkedin. There is a 3 step process (as others as stated). First interview was with HR, then a manager from the practice I was assigned (which was technical) and last call with the director (personality interview). Overall, the interview process was pretty straight forward and not difficult at all. They mainly wanted to get you and who you are as a person (rather than how much you actually know).

4 interview: 1 screening, 1 case, 2 behavioral. The case study is fairly open-ended. You need to go in with a basic understanding of business concepts, but you won't be quizzed on anything. The 2 behavioral are casual conversations. They are mainly looking for logic/reasoning skills, communication, and confidence. The hardest thing is getting an interview. I was lucky to have an employee referral.