Diana E. Clarke, MSc, PhD, is the managing director of research and senior epidemiologist/research statistician at the American Psychiatric Association. In this role, she co-leads efforts to oversee the maintenance of the Diagnostic and Statistical Manual (DSM). In addition, Dr. Clarke conducts research on the assessment and prevention of mental and substance use disorders, including suicide and suicidal behaviors. Also, she researches gaps in training for behavioral health providers and the potential impact on patient outcomes. Her research efforts are multifaceted with an overall goal to help: 1) inform our understanding of the underlying causes of mental and substance use disorders across the lifespan and associated disparities in access to care; 2) identify modifiable risk and protective factors that can positively impact the lives of individuals across different age, gender and ethnoracial groups; and 3) identify gaps in training and impact on quality of care. Dr. Clarke utilizes interesting combinations of quantitative and qualitative methods in her research endeavors. She is also an adjunct assistant professor in the Department of Mental Health at the Johns Hopkins Bloomberg School of Public Health. She has received many honorific awards as well as federal and foundation grants for her work. She has numerous peer-reviewed publications as well as book chapters. She currently leads the APA’s CDC/CDC Foundation-funded effort to examine training gaps in maternal mental health care and efforts to inform management of pregnant persons with mental and substance use disorders.