He had notable success as a professional driver, winning the Uruguayan National Grand Prix four times and also the Buenos Aires-Mendoza race in 1935.

His contemporaries were drivers such as Juan Manuel Fangio, “Hipomenes” Angel Lo Valvo, “El indio rubio” Arturo Kruuse, the Gálvez brothers and Raúl Riganti.

He was also a friend of intellectuals and writers such as Juan José Morosoli (author of "Journey to the Sea") and Julio César Castro (aka Juceca, the creator of Don Verídico).

Suppici Sedes was killed in a crash in the Gran Premio Internacional del Norte, the final round of the 1948 Turismo Carretera season.

Looking for a refueling point, he stopped on the course to make a U-turn and was hit in the drivers' door by Antonio Zarantonello, who swerved onto the wrong side of the road having been hindered by dust and spectators.