I applied for several intern positions on the website. I was contacted through email about an interview possibility. Once I said I was interested, I received an email with instructions on how to book my all expenses paid trip to Denver. I was given a plane ticket, hotel and a rental car. At the interview site there were about 9 other intern candidates. We were not interviewing for specific positions, just for the company in general. The interviews consisted of several one-on-one interviews with managers of different projects in the Denver area. All of the interviews were in STAR format. They literally had a sheet of paper with questions on it and columns for your situation, task, action and result. Be prepared for several STAR format questions about communication, teamwork and leadership.