He is known for tuning and racing cars from marques such as Alfa Romeo, Lancia, and Opel.
After serving in the Regia Aeronautica as an aircraft mechanic in World War II, he established Autotecnica Conrero in 1951, and successfully tuned Alfa Romeo cars until 1969.
His workshops also built a small number of cars in the 1950s based on Alfa Romeo chassis, such as the Conrero Alfa Romeo that competed in the 20th Mille Miglia in 1953.
He also built one of what had been a planned four-car team of Triumph Conreros for Le Mans.
After his involvement with Alfas ended, he began a cooperation with General Motors Italy, tuning and race preparing Opels.