Jack McVicker is an American martial arts expert and a Brazilian jiu jitsu pioneer in the Midwest of the United States where he established his academy McVicker BJJ. A certified instructor in jeet-kune do and Filipino martial arts under Dan Inosanto, and the first ever jiu jitsu black belt awarded by Wellington "Megaton" Dias, Jack McVicker is also known as one of the most accomplished athletes in the sport's Masters division.