Reshetynskyi at the 2014 Winter Paralympics where he competed in five events.[1] During the 2017–18 season, he won a bronze medal at the World Cup in Vuokatti.[2][3] He then competed at the 2018 Winter Paralympics, where he again competed in five events, with his best result being fourth place in 7.5 kilometres event.[4] At the 2019 World Para Nordic Skiing Championships, he won a bronze medal in the open relay.[5]
Reshetynskyi competed in the 2022 Winter Paralympics, with his best results in fourth place at the 10 kilometres and 12.5 kilometre events.[6][7]
At the 2024 Para Biathlon World Championships, Reshetynskyi won three medals, two of which resulted in silver and one in bronze.[8] In February 2025, at the Para Biathlon World Championships, Reshetynskyi won the silver medal in the individual and sprint events.[9][10]
Reshetynskyi competed in the 2026 Winter Paralympics, where he won the silver medal in the men's sprint.[11][12]