Justine started skiing at the young age of three. Justine had a lot of energy growing up, so when she was seven years old her parents enrolled her in a gymnastics program. This is where the young athlete fell in love with acrobatic sports. Justine had a great gymnastics career, ending it in 2017 as a level 10 gymnast.
In 2018, she tried out at the RBC Training Ground event where she met her coach Rémi Bélanger. This friendly competition jump-started her freestyle aerial career.
In 2020, she participated in her first World Cup tour. She managed to make a name for herself by competing in many finals. After the 2020-2021 winter season, she officially made the Canadian team.
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