O-1 Visa
This category is available to foreign nationals who have achieved a high level of expertise in their own field of studies in science, art, education, business, or athletics and has risen to the very top in their field. Foreign national's achievements in the field must be recognized through extensive documentation and the foreign national must seek entry to the U.S. to continue work in the area of extraordinary ability and must demonstrate that entry will substantially benefit the U.S. An O-1 petition has an initial period of stay of up to 3 years. Subsequent extensions may last for no more than one year at a time. There is no limit to the number of extensions. Foreign nationals who are already in the United States on a different visa classification may request a change of status to O-1 or if on O-1 classification then to extend their O-1 status by filing a Form I- 129 (Petition for a Nonimmigrant Worker) directly with the USCIS.