Lengthy and multi tiered, they give you a tour and tell you the history of the facility and what it is they do there. They paid to have you interview over lunch while speaking to you about what they do and showing their passion.

3 interviewers. First there was a brief phone interview. Then there was a in person interview. They asked about myself. They they asked about my qualifications and then some technical questions followed. Then asked what type of work environment I preferred. Then more light questions at the end.