Here in ATL, Delta has hires ramp controllers. From the research I have done, they only hire from within for this (for the most part) and as jrdownunder stated, they are usually senior employees. When I looked at this as a possibility everyone's advice was to get on ready reserve slamming bags. Because I made almost double what Delta pays for this fueling and towing for the FBO at the airport near where I live, and I need full time not 20 hours a week, it just wasn't something I could do at the time. I still think working as a ramp controller would be pretty fun. But after I learned about the aircraft dispatch position (up until this past October I didn't even know that existed or what it was), I definitely am shooting for that.