There was a main interviewer with an assistant, I believe someone in training. It was an overall pleasant experience, they asked pertinent questions and were very enthusiastic, calm and polite.

First you will have a telephone interview with a recruiter. If all goes well, you will get a call from the manager at the office and get a first in-person interview. Finally, if they decide to hire you, you will need to go into the office a third time to talk logistics, hours, salary, etc.