Nicholas C. Peiper, PhD, MPH, is a Behavioral Scientist in RTI International's Behavioral and Urban Health Program, with 10 years of experience in substance use, mental health and clinical epidemiology. His current work with the Centers for Disease Control and Prevention (CDC) evaluates prescription drug monitoring programs, opioid overdose policies and medication assisted treatment programs. Through the Substance Abuse and Mental Health Services Administration (SAMHSA), he also investigates psychiatric comorbidity and service utilization among adults with serious mental illness. In a similar line of research, Peiper concentrates on the application of emergent computational methods to understand the epidemiology of cannabis use, including the intersection with opioids. As part of this work, he currently conducts Internet-mediated surveys to better understand quality of life outcomes among medical cannabis patients who substitute cannabis for Rx opioids and heroin. In addition, he holds an adjunct appointment in the Department of Epidemiology and Population Health at the University of Louisville, where he teaches online doctoral courses in behavioral epidemiology and applied research methodologies; directs practicum and internship programs; and mentors graduate students in public health and the social sciences.