Maheu represented Canada for the first time at the 2012 U23 World Championships in Wausau, where she finished 21st individually and 5th in the team event. She would compete at the U23 Worlds four more times from 2013 to 2016. In 2017 she won her first national title and finished as top Canadian at her first Senior World Championships in Pau. She finished in a career-best 13th place at the 2018 World Cup in Liptovský Mikuláš.