Nathaniel A. Dell is a licensed clinical social worker and Assistant Professor in the Department of Psychiatry at Washington University School of Medicine in St. Louis, MO. His research interests include evaluating evidence-based practices for people with serious mental illnesses & co-occurring substance use disorders, promoting the uptake of evidence-based, recovery-oriented psychosocial interventions, and leveraging big data & data science approaches to identify the behavioral health needs of hidden and hard-to-reach populations, such as people who are unhoused, people experiencing crisis migration, and survivors of human trafficking.