The Office of Immigration Services manages the immigration work for all international faculty and staff hired by the University. Immigration Services must obtain work authorization from the Immigration and Naturalization Service for each foreign national before he or she can begin any appointment with the University. Typically, it takes three to four months to obtain work authorization. Hiring departments must contact the Office of Immigration Services at 275-3314 before an offer is made to a foreign national. The work-authorized, non-immigrant classifications most often used at the University are H-1B, J-1 and TN.