Arious visa categories are available for u.s. based companies to bring foreign workers of all levels including, unskilled, skilled, professional, and advanced professional to work in the u.s.
In addition to the e-2 and eb-5 investment visa and the o-1 and eb-1 extraordinary ability visa, there are various other visa categories for foreign workers including eb-2 for advanced professionals, eb-3 for unskilled, skilled, and professional workers, eb-1c and l-1 for multinational transfers, h-1b for professional workers, and h-2b for seasonal laborers.
Two visa categories allow for U.S.-based companies to transfer foreign employees with specialized or managerial knowledge from their parent company, subsidiary or affiliate established abroad. The L-1 nonimmigrant visa and the Eb-1c green card.