The purpose of this SAMHSA program is to develop and strengthen the specialized behavioral healthcare and primary healthcare workforce that provides substance use disorder (SUD) treatment and recovery support services. This is done by accelerating the adoption and implementation of evidence-based and promising SUD treatment and recovery-oriented practices and services; heightening the awareness, knowledge, and skills of the workforce that addresses the needs of people with substance use or other co-occurring physical and behavioral health conditions; and fostering regional and national alliances among culturally diverse practitioners, researchers, policy makers, funders, and the recovery community.