Montaggioni competed at the 2013 World Para Taekwondo Championships in Lausanne, winning a bronze medal in the -68 kg category. He then began his para-snowboarding career in 2015 at the international level. He distinguished himself with his first podium in the World Cup with the French team in March 2016 at the French resort "Les Angles". At the 2017 World Para Snowboard Championships held at the Big White Ski Resort, Montaggioni won his first medal, winning silver in snowboard cross event on 4 February. Three days later, he won the gold medal in the banked slalom event. He competed at the 2019 World Para Snowboard Championships, winning the gold medal in both the snowboard cross and banked slalom.
Montaggioni won the gold medal in the men's dual banked slalom at the 2021 World Para Snow Sports Championships held in Lillehammer, Norway.[1][2] He also won the gold medal in the men's snowboard cross event.[3][4]
He competed in snowboarding at the 2022 Winter Paralympics held in Beijing, China and won the gold medal in the banked slalom SB-UL event.[5]
