He founded and ran the Ensign Formula One team in the late 1970s and early 1980s, and later worked for Chip Ganassi's highly successful Champ Car team, before founding Mo Nunn Racing for the 2000 season.
In the late 1970s and early 1980s, he founded and ran the Ensign Formula One team. He then joined Chip Ganassi's highly successful Champ Car team before establishing his own team, Mo Nunn Racing, for the 2000 season.