This practical two-hour training explores the critical intersection between attention-deficit/hyperactivity disorder (ADHD) and substance use disorders (SUDs). With approximately 1 in 5 individuals with SUD also experiencing ADHD, understanding this common co-occurrence is essential for effective support. Designed to support behavioral health practitioners across a range of service lines, this introductory training provides practical strategies for identification, engagement, and person-centered support. Participants will gain foundational knowledge about both conditions, explore the neurobiological and psychosocial factors that contribute to their co-occurrence, and learn culturally responsive approaches for supporting clients who may be experiencing both challenges. Attendees will develop skills to recognize potential signs of ADHD in clients with substance use concerns, initiate supportive conversations, and connect clients with appropriate resources within the constraints of their role as unlicensed providers. This training is intended for field-based mental health and outreach workers in Los Angeles County.