Like nothing else. The interview is a mix of discussion of philosophical issues with your peers and a few BW people, and personal interviews where an employee asks you to justify your life choices. You are expected to engage on a level employers rarely expect — possibly for good reason. The interview, like the company, felt somehow both violating and revelatory. I was discussing my childhood, passions, relationship with my father at an interview to work at a hedge fund. This seems entirely irrelevant but is indicative of what you'll be seeing should you take a job at Bridgewater. The deep focus on individual strengths and weaknesses can be a beautiful thing and can be very, very unpleasant. Lots of personality testing as well; expect to spend a few hours testing in advance of your debate.