Temporary employment visas allow the hiring of foreign nationals to work in a specific job for a limited amount of time, and once in the U.S. they are restricted to the activity or reason for which their non-immigrant visa was granted.  Depending on the visa classification, and in some cases, the nationality of the intended employee, the employer may be required to file a petition for a non-immigrant worker with USCIS. Once approved, the State Department determines whether the foreign worker meets the criteria for a non-immigrant visa.

A permanent employment visa allows foreign nationals to work and live lawfully and permanently in the United States. Lawful permanent residents are subject to fewer restrictions than temporary workers, and can generally apply for U.S. citizenship.

There are other options for employment visas that depend on the kind of work you enter the United States to do, or the kind of job that is offered. If you are planning on entering the United States to work, it is important that you seek legal advice to assure that the visa you apply for is the best suited for you, and gives you the most benefits.

Students and exchange visitors may also under some circumstances, be allowed to work in the United States,however, they must first obtain a work permit.