Matthieu Villatte, PhD, is an Assistant Professor at Bastyr University in Seattle, WA in the United States. He obtained his doctoral degree in psychology in France, where he was trained as a clinical psychologist. He moved to the US in 2010 to complete a post-doctoral fellowship at the University of Nevada, Reno under the mentorship of Steven Hayes, PhD. He then worked as an assistant professor in clinical psychology at the University of Louisiana and at the Evidence-Based Practice Institute of Seattle for several years. He joined Bastyr University as an Assistant Professor in 2018. Matthieu Villatte is the author of numerous books and chapters on mindfulness, acceptance, experiential therapies, and contextual behavioral science, such as the first manual published in French on Acceptance and Commitment Therapy and Mastering the Clinical Conversation: Language as Intervention, co-authored by Jennifer Villatte and Steven Hayes.