E-1 Treaty Traders:

The E-1 nonimmigrant classification allows a national of a treaty country (a country with which the United States maintains a treaty of commerce and navigation) to be admitted to the United States solely to engage in international trade on his or her own behalf.  Certain employees of such a person or of a qualifying organization may also be eligible for this classification

E-2 Treaty Investors:

The E-2 nonimmigrant classification allows a national of a treaty country (a country with which the United States maintains a treaty of commerce and navigation) to be admitted to the United States when investing a substantial amount of capital in a U.S. business. 

Certain employees of such a person or of a qualifying organization may also be eligible for this classification. 

The E2 Investor Visa allows an individual to enter and work inside of the United States based on an investment he or she will be controlling, while inside the United States.  This visa is must be renewed every other year, but there is no limit to how many times one can renew.  

The investment must be "substantial”, and the investor must clearly demonstrate the source of the capital invested was lawfully obtained and is the investors own funds.

 H1B Specialty Occupation:

The H1B is a non-immigrant visa category allowing U.S. employers to seek temporary employment from skilled foreigners, who have a U.S. Bachelor’s Degree or its equivalent, and who will be temporarily employed in a "specialty occupation."  The United States Citizenship and Immigration Services limits the number of H-1B Visas approved every year.  The H-1B Visa as an annual “cap” of 65,000 visas each fiscal year.

H-2A Temporary Agricultural Workers:

The H-2A program allows U.S. employers to bring foreign nationals to the United States to fill temporary agricultural jobs for which U.S. workers are not available.  H-2A nonimmigrant classification applies to aliens seeking to perform agricultural labor or services of a temporary or seasonal nature in the United States on a temporary basis.

H-2B Temporary Non-Agricultural Workers:

The H-2B non-agricultural temporary worker program allows U.S. employers to bring foreign nationals to the United States to fill temporary nonagricultural jobs.  H-2B visas are issued to foreign nationals to work temporarily in jobs for which employers can prove a shortage of qualified American workers. 

J-1 Exchange Visitors:

The J1 visa is designed to provide educational and cultural exchange programs, and to promote the sharing of individuals, knowledge and skills in education, arts and sciences.

J-1 Exchange Visitors are for those who intend to participate in an approved program for the purpose of teaching, instructing or lecturing, studying, observing, conducting research, consulting, demonstrating special skills, receiving training, or to receive graduate medical education or training. 

L1A/L1B Intra-Company Transferees:

L-1 visas permit foreign companies with branches or affiliations in the United States to transfer needed employees to their United States facilities.  L1 Intra-Company Transferees are essential executives, managers, or employees with specialized knowledge.  This classification also enables a foreign company which does not yet have an affiliated U.S. office to send an executive or manager to the United States with the purpose of establishing one. 

TN Visa for Canadians & Mexican Nationals:

The North American Free Trade Agreement (NAFTA) created special economic and trade relationships for the United States, Canada and Mexico.  TN status is only available to citizens of Canada and Mexico to work in the United States if the position requires a NAFTA professional.