HR pre-screening phone interview to basically assure you have the qualifications listed (20min). Followed by a phone interview with the hiring manager for specific questions on experience, career goals and what I would contribute (20min) - they want to see what your ideas are, what you plans are. They want you to be proactive and hungry for the chance to join them. This was followed by a full day on-site interview with a research talk, meeting with all the department managers and department head. Basically, will you fit in, does anyone see any red flags and are you trying to impress them. They throw HR in there to get a face to face psychological review - you can't want it too much or you'll be a risk. But they do want you to have your own goals, your own reasons for why this job would be good for you (other than the pay, benefits and rep). Overall, professional and useful.