You must be able to demonstrate extraordinary ability in the sciences, arts, education, business, or athletics through sustained national or international acclaim
You must demonstrate international recognition for your outstanding achievements in a particular academic field. You must at least 3 years experience in teaching or research in that academic area. You must be entering the Unites States in order to pursue tenure or tenure track teaching or comparable research position at a university or other institution of higher education.
You must have been employed outside the United States in the 3 years preceding the petition for at least 1 year by a firm or corporation and you must be seeking to enter the United States to continue service to that firm or organization.