callback interview after a job fair, followed by a phone interview, then a site visit and tour, then in person on site interviews, each in person interview was 3 interviews in a row with two people each time, the first round was with the engineering lead and another higher up, you will never see these people again most likely, the second round was with two people from the dept youre hiring into, like a shift lead and a busniess manager, the last round is with your hiring manager and whoever the second in charge after him