Sébastien Olivier Humbert Buemi is a Swiss racing driver, who competes in the FIA World Endurance Championship for Toyota and in Formula E for Envision. In formula racing, Buemi competed in Formula One for Toro Rosso from 2009 to 2011, and won the 2015–16 Formula E Championship with Renault. In endurance racing, Buemi has won a joint-record four FIA World Endurance Championship titles—tied with Brendon Hartley—and is a four-time winner of the 24 Hours of Le Mans, all with Toyota.