She has worked as a clinical psychologist at Sainte-Justine hospital (mother-child center) for 20 years, with children, adolescents and their families, mainly with clients suffering from eating disorders . Over the years, Mrs. Meilleur has developed an expertise in psychological assessment and intervention with children and adolescents (8-18 years old) with an eating disorder (anorexia, bulimia and unspecified eating disorders). Her research work focuses on various aspects related to eating disorders among pre-adolescents, adolescents and young adults and their parents. She also still practice clinical psychology.