The entire process lasted 3-4 months. 1st round: about 1 month after I submitted my application, they asked for unofficial transcripts and a coding sample. 2nd round: immediately after that, I received a data analysis practice. 3rd round: after turning in the exercise, I went over the exercise with a full-time Acumen analyst by phone. 4th round: Onsite interview at the Acumen main office in Burlingame, CA. The HR was professional and managed the process well. First a breeze-over math/logic test, then got grilled by 3 teams of two, one team leader and one analyst each. The result didn't came until over 2 months after the onsite interview.