All I can really do is echo what others have said and warn you that I am not aware of any state that has any sort of process for recognizing foreign EMS credentials. I don't know what level you are now under the Canadian scheme (PCP, ACP, CCP) but you would have to start completely over here. From EMT-B level. Frankly I would never trade the Canadian EMS system for the American one, but if that's what you want go for it.