Maureen Walton is a community psychologist who conducts research on prevention and early interventions to reduce substance use, violence, and injury, particularly among adolescents and young adults. She has expertise in harnessing technology for assessment and delivery of evidenced-based interventions to reduce violence and/or substance use (e.g., alcohol, cannabis, prescription drug misuse). Recent lines of work focus on optimizing interventions, including testing: combinations of telehealth and technology-delivered interventions for opioid misuse; adaptive interventions for violence and alcohol misuse via a Sequential Multiple Assignment Randomized Controlled Trial (SMART), and mobile health apps for assessment and intervention delivery, including conducting micro-randomized trials.