G ary Chouest is an American billionaire who is the president and CEO of the Edison Chouest Offshore group of companies, a global leader in the marine transportation and services industry for the offshore oil and gas sector. The company was founded by his father, Edison Chouest, as a small shrimping business in Galliano, Louisiana. Gary and his siblings took over and transformed the family business into a maritime powerhouse.

Under his leadership, Edison Chouest has built one of the world's largest and most technologically advanced fleets of offshore support vessels (OSVs), which are used to service offshore oil rigs and platforms. The company is also a leader in shipbuilding, with its own network of shipyards, and it operates its own port facilities. The company is a dominant force in the Gulf of Mexico and has expanded its operations globally. The privately held company is owned by him and his family.