After medical school, as a young family doctor, Cécile Rousseau worked with Mayan communities in the war torn Guatemala. Her subsequent clinical and research career has been dedicated to understand, and prevent the effects of organized violence on children, families and communities. She focused first on refugee mental health, uncovering the complex interactions between pre-migratory and post-migratory factors through numerous studies; she confirmed the pertinence of eco-systemic approaches for refugee care, which led her to develop school-based prevention programs for refugee children. Consulting to governments, she presently implements clinical and prevention programs to address the sensitive issue of violent radicalization.