 Aged 16, he lied about his age in order to join the French Army at the start of the war in 1914, before being transferred against his will to the Italian Army the following year.After the war, he and his brothers founded the piping and metal work company "Ponticelli Frères" ("Ponticelli Brothers"), which produced supplies for the Second World War effort and as of 2017 was still in business.He also worked with the French Resistance against the Nazis.