I had a 30 minute phone interview, followed by a 45 min in person interview with the supervisor and another staff member. The final round interview was between myself, my supervisor and faculty whom I would be directly supporting, it was about an hour long. Once the position was offered to me, I had to do a final interview with HR - this is standard at BU, but catches you a little off guard since you've been offered the job by the people you'll be working with. The interview with HR asked me to describe my qualifications for the position, my salary requirements and gave me an opportunity to ask questions about benefits.