I've interviewed with them. Pretty standard interview, although it's not just one person, I was interviewed by the hiring manager (or whatever his title was), and 2 EMTs.
Standard questions: Tell me about yourself, where do you see yourself in 5 years, strengths and weaknesses, etc. Then a couple medical questions. They might be the same each time, or they might be different for each person, I'm not sure. For example, I was asked to trace the path of blood through the heart... and I'm blanking on the others.
Also, a few scenario questions. Like differential diagnosis for patient with x chief complaint and y vital signs, etc.
I was really nervous during my interview with them for some reason, more so than any other interview. So, try to relax.
Good luck, and if I think of anything else I forgot, I'll post again.