Nimnim
The Nim
On file means just that, you're on file. When you move from that depends on turnover and how many other applicants there are. I'm assuming you haven't done a tour or interview yet, but do you know anyone who works for the location you're applying to? If so I'd suggest you ask them to talk to their shift manager about how great you'd be. Then the shift manager might get in touch with HR to push you forward in line.