From 1960 Aimoni started at the Four Hills Tournament , but could not achieve a top placement in the first few years. In 1962 he won his first national medal with the bronze medal in ski jumping. On January 6, 1963, he jumped eighth place in the top ten for the first time in Bischofshofen . At the Italian championships in 1964, he won his first national title. At the Olympic Winter Games in Innsbruck in 1964 he reached 28th place from the normal hill, tied with Otto Leodolter . He jumped from the large hill to 13th place. On December 27, 1964, Aimoni achieved sixth place in Oberstdorf, his best individual result at the Four Hills Tournament. At the 1968 Winter Olympics in Grenoble , he jumped from the normal hill to 25th place and from the large hill to 16th place. At the Four Hills Tournament 1968/69 he achieved his best result in the overall tournament with 53rd place. Aimoni celebrated his last success by winning the Italian championship.