Born in Saint-Brieuc, near Côtes d'Armor, Boullion started karting in 1982 and moved to cars in 1988 after attending a racing school outside Paris.

Although he was signed to test for Williams, he was loaned to Sauber to replace Karl Wendlinger for much of the 1995 season, scoring points twice but rarely matching his team-mate Heinz-Harald Frentzen.

Though the title battle lasted until the final round owing to Peugeot's non-participation at Silverstone, the factory team came out victorious, with Boullion having to settle for the runner-up spot with four podiums from six events.

At Le Mans, the Frenchman scored his second and final podium at the Sarthe, coming third behind the Audi and Peugeot works entries.

[6] The former would pose a further threat in the Le Mans Series in 2008, as Audi entered two cars into the championship, with Boullion still driving for the Pescarolo privateer.

However, a retirement at the Nürburgring would cost the pair dearly, as it handed the title advantage to Aston Martin Racing, who would take the championship at the final round, leaving Boullion and his teammate in second.