Hungarian-born, Hamori was a member of Hungary's World Champion (1955) and Olympic Gold Medal (1956) Sabre teams. In the US, he was Sabre Champion in 1961 and 1964 as well as 3-Weapon Team Champion in 1961, Sabre Team champion in 1964, and Epee Team Champion in 1965, all for Salle Csiszar of Philadelphia. He represented the US at the 1964 Olympics, won the Japanese National Championship in 1963, and competed at the 1971 Pan American Games. In 1972, he established the New Orleans Fencing Club, whose sabre team was medaled in the US Nationals.