My old boss has moved to the USA and he is enquiring about training his staff forklifts of differnt types.

My question is about trainers themselves. In the UK employed instructors must only train staff for the company they are employed with.

If the instructor moves company, he/she must resit another course to become an instructor for his/her new company. (a complete rip off i know)

I wanted to know the rules regards this situation in the USA.

Is it possible for the instructor who, say was a trainer for one company then moved to another company, continue to train the staff at his new employment without having to reregister/retrain?

I thank you in advance for your help.
Tommy