There were 3 case study interviews as well as 1 interview focused on talking about your cv and previous experiences. The 3 case studies all started with a simple brain teaser before moving on to evaluating the business case, usually based on the interviewer's own experience
The first part were two on-site same-day consecutive 45-minutes interviews with engagement managers, candidate-led cases with some behavioural questions as well. If selected to the second round, what followed was an online interview with a partner, mostly behavioural questions but also specific technical questions based on the feedback from the first round, in order to see if there was an improvement.
Interview questions [1]
Question 1
How many passengers travelled through Paris airport (CDG) during the olympics?
First behavioral interview super annoying that it is 3 at once. Typical tell me about yourself and why oliver wyman. The interviewer seemed like already made up the decision and it was very uncomfortable to undergo the interview.
Did not recieve a callback.
There was an online assessment which tested mostly mental math and reading graphs. Then, there was a 30 minute case interview and a 30 minute behavioral. Fairly straightforward and standard, with the case being easier than average.
Interview questions [1]
Question 1
Standard behaviorals -- why OW, tell me about a time when ___