I placed my resume into the postbac pool, and I was contacted by the lab with information regarding their projects and collaborations. They scheduled a phone interview shortly afterwards. The phone interview was with 5 members from the lab. I was then contacted two weeks after the interview being told I received the position and the next steps which include a background check.

Depends on the lab you're interviewing with, but most do an initial interview with the current IRTA of the lab before passing you on. Some do entire super-days of interviews,