I applied through an employee referral. I interviewed at Publicis Health Media (Philadelphia, PA) in Jan 2020
Interview
There was a first Round phone Interview and then a formal in person interview day + case study presentation. The formal interview will have you meet with maybe four or five folks and then present a case study at the end.
I first spoke with the internal recruiter on the phone and had back and forth emails and eventually got invited for an interview with a few people over video. I went through four rounds of folks and then had to do a data base case study.