Met at career fair and was invited to onsite interview in their NYC office for Oliver Wyman Labs. Had four back to back interviews: 2 case interviews, one data based, and one normal software engineering technical interview. Being new to case interviews I practiced around 10 beforehand and felt adequately prepared--but you can never get enough practice! Overall process wasn't bad but because it was such a long day (5+ hours) it felt pretty long. Atmosphere is typical, stuffy consulting atmosphere but the people seemed nice and enthusiastic about what they do. In the end they gave me a strange rejection saying that their current internship role wouldn't be a good fit for me.

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.