There are no formal interviews. You fill out the application, complete the certification process, and attend an orientation. References are needed, however. You must attend the orientation downtown near the airport, fill out ( a lot ) of paperwork, receive your ID, go over the handbook and scheduling process, and do a fingerprint check. It takes a few hours, but it's very straightforward. Dress business casual.

I applied online and they sent me an email for a background check to be hired without any interview about 4 months later. I was surprised at how easy, but it might have helped that I used to work for them and am a certified teacher.