I had a phone interview which lasted about an hour, and then less than a week later, I came in for a 6 hour interview from 10-4pm. I spoke the hiring manager, HR representative, 2 skip level managers, and a senior scientist for 30-45 minute interviews, and then had a lunch interview with 5 RAs who would be my peers. Some of the interviews were more personality-based, chatting and get to know each other, whereas others were technical. Before I came for the interview, I studied up on each person and previous work experience in order to speak in detail about the science and technical aspects.

Very hard. Asked a ton of hard questions I did not really study for, interviewers were really nice though but the questions during the interview were too hard. Would recommend to study a ton of science related questions