Joe Oliver, PhD, is a consultant clinical psychologist and joint director of the cognitive behavioral therapy (CBT) for psychosis postgraduate diploma program at University College London. He also works within a North London National Health Service Trust, developing training and delivering interventions for people with psychosis. He is founder of Contextual Consulting, a London-based consultancy offering acceptance and commitment therapy (ACT)-focused training, supervision, and psychological therapy. Joe is an Association for Contextual Behavioral Science (ACBS) peer-reviewed ACT trainer, and regularly delivers ACT teaching and training in the UK and internationally. He is coeditor of Acceptance and Commitment Therapy and Mindfulness for Psychosis, and coauthor of ACTivate Your Life and Acceptance and Commitment Therapy.