If you can tell me what you are saying I can tell you the answer

I apologize, but I am not sure what an H study is. Are you referring to the H-1B visa?

The most common non-immigrant visa is the H-1B visa, which permits foreign professionals to work in the United States. This visa is ordinarily available to foreign individuals who have a college or post-graduate education, and have a job offer from a United States company that is willing to sponsor them.

This visa can usually be obtained in approximately thirty days, for a duration of between one and three years. H-1B visas are renewable, and require only that the foreign professional work for the sponsoring employer. In order to change jobs within the United States, the foreign professional must obtain a new H-1B visa through the new employer. The H-1B visa can be converted into a permanent residency visa.

If they have a business (B-1) visa, permanent residency, or a business sponsored visa (i.e. H-1B).

Yes, however he/she will still need a work visa. I believe it is a H-1B visa.