The first interview was a phone screening, the second was a short case interview, and the third was a 2-hour two-part interview (conducted on-site or virtually) made up of one behavioral interview and one case study interview. They were quick to respond and the process was very quick overall due to the January 27 start date. I began interviewing December 14 (nothing during holidays) and ended Jan 7. The offer came Jan 9. It was very straightforward.