Most of you are completely wrong!! A visa to work in the US as a CFI is one of the easiest to get. He will need to get his FAA Private, IR and Comm as well as his CFI (MEII) All he has to do is enrol on a course that offers those qualifications with a job for the remainder of his 2 year visa. Easy, as it is one that is offered by many schools. If you think I am wrong, I am living proof that I am right.