Sierra Academy of Aeronautics: Individuals
The only way is a course like this one, you have to do a bachelors degree to be able to work temporarily in the US.
There is no way any company in the US can sponsor you for a working permit as a pilot.
The ONLY way is a course like the one above, a normal flight school can not issue this type of visa, you have to do a degree as well as the flight training.