All foreign workers must obtain permission to work legally in the United States. Business immigration law addresses the process by which employers and employees apply to allow individuals from other countries to work lawfully in the United States.

Each employment category for admission has different requirements, conditions, and authorized periods of stay. There are Exchange Visitor Visas called J-1's, there are Temporary Worker Visas called H-2Bs for non-agricultural fields, there are Temporary Worker Visas for Skilled Workers, and there are Seasonal Agricultural Worker Visas called...