Sadowski-Synnott has been participating in the Ticket to Ride World Snowboard Tour and FIS competitions since 2015 . She took early in the season 2015/16 at the Continental Cup in Cardrona in Slopestyle their first victory. At the beginning of the 2016/17 season, she won the Cardrona Games in slopestyle. She made her debut in the Snowboard World Cup in December 2016 at Copper Mountain . She was ninth in the big air competition. In February 2017 she achieved her first podium finish in the World Cup with third place in Big Air at the World Cup in Québec City . At the World Championships in Sierra Nevada in March 2017 , she won the silver medal in slopestyle. She also finished fourth in Big Air. At the last World Cup of the season in Špindlerův Mlýn , she won her first Slopestyle World Cup and at the end of the season she finished seventh in the Freestyle World Cup and sixth in the Slopestyle World Cup.
At the beginning of the 2017/18 season, Sadowski-Synnott took third place in the Slopestyle World Cup in Cardrona. At the 2018 Winter Olympics in Pyeongchang in Big Air, which was held for the first time as part of the Olympic snowboarding competitions, she won the bronze medal behind Austrian Anna Gasser and American Jamie Anderson on February 22nd . In slopestyle she came in 13th place. In May 2018 she finished fourth in Big Air at the X-Games Norway in Fornebu . At the Snowboard Junior World Championships 2018 in Cardrona, she finished eighth in slopestyle. In the season 2018/19 she won at the Burton US Open in Vail slopestyle and won at the Winter X Games 2019 in Aspen the silver medal in Big Air and the gold medal in slopestyle and in the snowboard world championships in 2019 in Park City , the Gold medal in slopestyle. The following year she was fifth in the Slopestyle and fourth in the Big Air at the Winter X Games and won the gold medal in Slopestyle at the X Games Norway in Hafjell .