Deloitte follows a pretty standard interview set up in comparison to the other big accounting firms. I was interviewing the summer/fall of my senior year of undergrad for a summer position post-graduation and the understanding of working for Deloitte full time after going back school for one year to complete my masters in accounting. During January of my junior year I applied to one of Deloitte's "leadership conferences" and was invited. Although I was not committed to getting my CPA at that point, going to a conference let me really get to know people in my city's Deloitte office. Despite my hesitation to commit to a CPA, I was invited to interview on campus in September. The campus interview was really relaxed since I had already met everyone at the conference in August. Following the interview on campus, I was invited to office visits in October. Office visits consisted of a presentation given by one of the partners, and two one-on-one interviews. During my interviews I disclosed that I was more interested in working towards my MBA than my CPA, which was likely the reason I did not receive an offer. Everyone that I interviewed with seemed concentrated on getting to know my personality and work ethic. They didn't quiz me on any kind of technical issues. I do think it is important to have a thorough understanding of different services (ERS, etc.) so that you can converse well with everyone you contact.