This program, funded by a National Institute of Mental Health Institutional Research Training Grant (T32), has 2 Mental Health Research Network (MHRN) systems serving as postdoctoral training host sites: Henry Ford Health System (Michigan) and Kaiser Permanente Northern California. Each system recruits 2 new postdoctoral trainees per year. There are multiple mentorship opportunities from experienced local mentors at each host site, from the full network of MHRN investigators, and from an external advisory committee. The fellowship involves a combination virtual and on-site format, including 2 on-site sessions each year. The training program is interdisciplinary and expects to recruit PhD-level trainees from many disciplines, including psychology, epidemiology/public health, social work, medicine, nursing, economics, health services, economics, data science, and others.