Dr. Marie-Hélène Pennestri is an Associate Professor in the Department of Educational and Counselling Psychology and Associate Dean of Research and Innovation of the Faculty of Education at McGill University. She is also a Regular Researcher at the Integrated University Health and Social Services Centre of the Nord-de-l’Île-de-Montréal (CIUSSS NIM). She is the director of the pediatric sleep laboratory, Once Upon a Night. Dr. Pennestri’s research program aims to investigate the development of the sleep-wake cycle in infants, children, and adolescents, from a developmental and family perspective. She also investigates associations between sleep and mental health in vulnerable populations. Dr. Pennestri holds grants across all three Canadian councils (CIHR, SSHRC, and NSERC) and from provincial agencies. Taking a multidisciplinary approach, her projects integrate both physiological and psychological measures. In addition, Dr. Pennestri is a clinical psychologist working with children, adolescents, and their families at the Pediatric Sleep Clinic of Hôpital en santé mentale Rivière-des-Prairies. She is actively involved in her community and in activities that facilitate knowledge transfer. Dr. Pennestri’s research questions are drawn from her experiences as a clinician and a mother.