Persons with extraordinary ability in the sciences, arts, education, business, or athletics. Applicants in this category must have extensive documentation showing sustained national or international acclaim and recognition in their fields of expertise. Such applicants do not have to have specific job offers, so long as they are entering the U.S.

To work in the United States temporarily as a lawful nonimmigrant, temporary workers must qualify for the available visa category based on the planned employment purpose. The steps in the process before applying for a visa vary.

Generally, a citizen of a foreign country who wishes to enter the United States must first obtain a visa, either a nonimmigrant visa for temporary stay, or an immigrant visa for permanent residence. Temporary worker visas are for persons who want to enter the United States for employment lasting a fixed period of time, and are not considered permanent or indefinite.