Initial phone call to set up a date for a phone interview, followed by a very structured phone interview. You need to follow the STAR format when you answer all the questions (Situation-Action-Result), and be wary that they may be completely silent during the entire interview (aside from asking the questions). You also need to assume they do not have your resume in front of them while answering the questions.
Finally, I was invited for a very informal site interview which was mostly a tour and out-to-lunch, with a couple of basic questions. Make sure to ask a lot of questions while on the tour.