Harriet MacMillan, MD, MSc, FRCPC, is a psychiatrist and pediatrician conducting family violence research. She is a member of the Offord Centre for Child Studies, and professor in the departments of Psychiatry and Behavioural Neurosciences, and of Pediatrics at McMaster University, with associate memberships in the departments of Clinical Epidemiology and Biostatistics, and of Psychology. Harriet holds the David R. (Dan) Offord Chair in Child Studies. From 1993 until 2004, Harriet was the founding director of the Child Advocacy and Assessment Program at McMaster Children’s Hospital, a multidisciplinary program committed to reducing the burden of suffering associated with family violence. Her research focuses on the epidemiology of violence against children and women; she has led randomized controlled trials evaluating the effectiveness of approaches to preventing child maltreatment and intimate partner violence. Funding for this work has been provided by organizations such as the WT Grant Foundation, the Canadian Institutes of Health Research, NARSAD, and the Centers for Disease Control and Prevention.