Employment visas Employment visas are provisions indicated on a passport for foreign workers who are approved to enter the United States and work for a set period of time. There are a limited number of these visas made available, so there is much competition to qualify. They are typically issued on a temporary basis, and they are usually contingent upon sponsorship from a worker’s prospective employer. In order to sponsor an employment visa or hire a foreign worker, a company must first complete and submit an Immigrant Petition for Foreign Worker. If the application is approved by the United States Department of State, an employer can then sponsor an employment visa.