The experience of trauma is quite common across the human lifespan, with some survivors going on to develop mental health concerns such as anxiety, depression, and post-traumatic stress disorder. Others may even engage in maladaptive coping strategies, including overuse of substances like alcohol and other drugs. Trauma survivors are also at an increased risk for a wide array of other physical and interpersonal challenges, which can exacerbate concerns associated with substance use. This training provides an orientation to the intersection of trauma and substance use across the lifespan. This training is intended for field-based mental health and outreach workers in Los Angeles County.