When Larrousse was recruited by Renault, he hired Sage to run the newly forming F1 team in 1977. He oversaw the running of the team right from its debut at the 1977 British Grand Prix, through the first win at the 1979 French Grand Prix, the glory years of Alain Prost and René Arnoux—when the French squad was fought for the World Championships in and —and its withdrawal at the end of the 1985 season. Sage stayed with Renault until the end of 1987, when it stopped supplying its turbo engines to other teams.