Robyn D. Walser, PhD, is the director of Trauma and Life Consultation and Psychology Services, assistant professor at the University of California, Berkeley, and director of research at Bay Area Trauma Recovery Clinical Services. Dr. Walser has contributed significantly to the dissemination of Acceptance and Commitment Therapy (ACT) and holds a pivotal role in implementing ACT in one of the largest U.S. healthcare systems. She also works at the National Center for PTSD, where her focus is on trauma recovery, depression, and moral injury. Dr. Walser has coauthored nine influential books on ACT and has led ACT workshops worldwide.

Manuela O’Connell, Lic., is a licensed psychologist from Buenos Aires, Argentina, internationally recognized for her work in acceptance and commitment therapy (ACT), mindfulness, compassion, and functional analytic psychotherapy. She is a fellow of the Association for Contextual Behavioral Science (ACBS), she currently serves as president of ACBS and of the Awareness, Courage and Love Global Foundation.

Dr. O’Connell is a trainer, supervisor, and retreat leader, offering programs in Spanish and English for clinicians worldwide, and facilitating over 10 ongoing study groups for professionals across Spanish-speaking countries. She has published widely on ACT, and the therapeutic relationship, alliance, and rupture..