Lindsey Zimmerman, PhD, is a Clinical and Community Psychologist and Implementation Scientist at the National Center for PTSD, Dissemination and Training Division of the Veterans Health Administration. Dr. Zimmerman is principal investigator of National Institutes of Health (NIH) and Veterans Health Administration (VA) research that enlists participatory system dynamics to increase timely patient access to evidence-based pharmacotherapy and evidence-based psychotherapy for depression, PTSD, and alcohol and opioid use disorder.