Coyne et Bellier is a global consulting and engineering firm based out of Gennevilliers, France. They specialize in infrastructure projects such as dams, nuclear and hydroelectric power plants, roads, tunnels and other below-surface facilities. The company also carries out environmental and social impact assessment. They operate out of 43 offices in Asia, Europe, the Americas, and Africa. The company was created by André Coyne and is a subsidiary of Tractebel.