[1] Grondin has won three medals at the FIS Snowboarding Junior World Championships, with a silver in 2018 and 2019, while winning gold in 2021.

[2] In 2018, Grondin competed at his first Olympics at the age of 16, becoming the youngest male athlete on Team Canada.

Grondin finished in 36th place in the snowboard cross event at the games.

[3][4][5] Grondin would go onto win the silver medal in the snowboard cross event.

[6][7] Grondin would later win the bronze medal in the inaugural mixed team snowboard cross event with compatriot Meryeta O'Dine.