Phone screen with hiring manager (what are you looking for, why are you interested in this role, etc.), technical interview with DS director (imagine you have X data set and need to build X product, what's your approach), (remote) on-site interview with technical interviews, business scenarios, and behavioral questions. The whole process took about 3 weeks. The interviews were hit or miss. Some interviewers seemed combative and a little too bought-in to the party line ("we all love rapid prototyping"). It struck me that (like many DS management positions) what they really want is an engineer, not a "data scientist" (which is a vague title but to my mind is closer to an analyst than an engineer; reasonable people can disagree about this).