Hesler made her
Bobsleigh World Cup debut during the
2019–20 Bobsleigh World Cup. She finished in fifth place in the two-woman event in her debut. In February 2020, she made her
IBSF World Championships debut in the
two-woman event. During the final of the
2020–21 Bobsleigh World Cup, she won her first monobob event with a time of 1:48.37. She finished the monobob World Series in fifth place. She represented Switzerland at the
2022 Winter Olympics and finished in sixth place in the
two-woman event and seventh place in the
monobob with a total time of 4:22.81. In January 2023, she competed at the
IBSF European Championships 2023 and won a silver medal in the two-woman event with a time of 1:55.36. The next month she competed at the
IBSF World Championships 2023 and finished in fourth place in the
two-woman event with a total time of 4:34.29. In February 2024, she competed at the
IBSF European Championships 2024 and won a bronze medal in the two-woman event with a time of 1:42.06. She again competed at the
IBSF European Championships 2025 and won a silver medal in the monobob with a time of 1:49.33. This was the first medal in monobob for Switzerland in
European Championships history. She competed at the
IBSF European Championships 2026 and won a gold medal in the monobob event with a time of 2:23.80. She became the first Swiss athlete to win the title in the discipline. The next day she also won a gold medal in the two-woman event with a time of 2:18.41, finishing 0.02 seconds ahead of the German team of
Laura Nolte and
Leonie Kluwig. ==World Championships results==