Bujold made her first senior international appearance at the 2008 AIBA Women's World Boxing Championships. She won a gold medal in the women's flyweight category at the 2011 Pan American Games. She was not selected for the 2012 Summer Olympics. At the 2014 Commonwealth Games in Glasgow, Bujold won a bronze medal, after losing to Briton Nicola Adams in the semi-finals. In the same year, Bujold finished fourth at the 2014 AIBA Women's World Boxing Championships. She won another gold medal at the 2015 Pan American Games. She was critical of a proposal to remove head protection for amateur boxers, and at one point, she threatened to retire if the rule was enacted.