 Severino won two bronze medals in the 4 x 10 km at the FIS Nordic World Ski Championships, in 1939 together with his brother Aristide, Gottfried Baur and Alberto Jammeron, and in 1941 with Giulio Gerardi instead of Baur.At the 1948 Winter Olympics he was a member of the Italian relay team (together with Vincenzo Perruchon, Silvio Confortola and Rizzieri Rodeghiero) which finished sixth in the 4x10 km relay competition.In the 18 km event he finished 22nd.