There was a three step interview process: 1.) Fit-based phone interview (30 minutes), 2.) Skype interview (1.5-2 hours), and 3.) 5-6 hour in-person interview. The phone interview was mostly basic behavioral/fit questions you would expect (why consulting, why C1), with a large emphasis on experience working in teams and multi-tasking. I didn't really get a feel for the company at this point. The Skype interview included a 30 minute SAT-type online exam (quant, spelling, grammar, etc), followed by more behavioral/fit questions, and then case-style questions about data presented on PowerPoint slides with one consultant. The consultant was very nice, and I actually thought this interview was really fun. I would say that if you don't enjoy this phase of the interview process, your background and personality are probably not a good fit for C1. The in-person interview consisted of more short behavioral/fit interviews, two case interviews, lunch, and a 15 minute presentation. This was my first time through this process so it was a bit nerve wracking, but everyone I spoke with was really nice and not at all what I expected based on the reviews (but what I was hoping for based on the second interview). Appears to be a pretty tight-knit group, so personality/fit is (probably) really important. My opinion: The behavioral/fit questions and presentation should come pretty naturally to you to succeed in this environment, but definitely practice for the case interviews. They are a twist on the traditional case interviews you'll find at bigger firms. Give yourself plenty of time to practice. Definitely bummed I messed this one up.

On-campus recruiting -> resume screen -> phone interview -> online assessment -> Skype case study -> in-person interview. Phone interview: approximately one half-hour of standard interview questions. "Why do you want to be a consultant?" - "Describe your ability to work in teams." - "Describe a time you failed and what you learned from it." Online assessment: easy test battery (timed) with basic math and verbal questions. Skype case study: Roughly an hour long qualitative case study specific to C1 industry. In-person interview: Two hour long behavioral interviews followed by half hour lunch with team, followed by two hour long case studies (one qualitative, one quantitative. Finished with half-hour presentation on topic of my choosing.