I see. A little process, huh?. Ok, i'll check that out. Now, what happens if i have a license, but such license was issued by another state?
If you have a license under that condition, you must notify the DMV's Bus Driver Unit by writing in a 10 days period in order to change your address shown in your license. You must include your name, DMV ID Number, Client and  ID Number, aside your old address and the new.
How can i get certified to be an escort driver?
It's pretty simple. Go to any DMV office which offers the escort driver certification test, and once there, complete the form MV-65 for Vehicle Driver Application.