Dr. Castillo’s research focuses on health equity and health justice, serious mental illness, and community-public-academic partnerships. By combining health services and social medicine research methods, Dr. Castillo aims to improve the capacity of public systems to address disparities, particularly in homelessness and incarceration. He is currently leading a NIMH-funded project on the jail-to-homelessness pipeline experienced by individuals with serious mental illness. Dr. Castillo’s research has been conducted in close partnership with local, state, and national agencies and community organizations including the Office of the Surgeon General, the New York State Office of Mental Health, the Los Angeles County Departments of Mental Health and Health Services, the RAND Corporation, and Healthy African American Families II. He is a current member of the APA Council for Advocacy and Government Relations; is a column editor for Research, Community, and Services Partnerships for the journal Psychiatric Services; and serves on the editorial boards of Academic Psychiatry and Community Mental Health Journal. Dr. Castillo is the Associate Vice Chair for Justice, Equity, Diversity, and Inclusion at the UCLA Department of Psychiatry, where he teaches and oversees a longitudinal residency curriculum on the topics of homelessness, health equity, structural competency, and physician advocacy. He is the faculty lead of UCLA Community and Global Psychiatry, a resident-faculty collaborative focused on public service and health equity (www.uclacgp.com). He is one of three physician members of the New Voices Initiative of the National Academies of Sciences, Engineering, and Medicine (2021-2023).