The structure of the interview, is that there is a pre interview social, then the first one on one interview for 30 min, then a second pre-interview social, than another interview, this time at the office. You will meet with a partner and two other employees, where they will have you a few behavioral questions to see how you work in teams, leadership, communicating. You must be personable, but still very professional. They need to make sure they can work with you, so be excited and try to connect with interviewer.