Dawn Johnson works as a Clinical Psychologist in private practice, offering therapy, teaching, training, supervision, and consultation. She previously had a long career in the National Health Service and has extensive experience of adapting ACT to work with people with intellectual disabilities, neurodiversity, and severe mental health problems.

Richard Bennett works as a Clinical Psychologist and Cognitive Behavioural Psychotherapist. He lectures at the Centre for Applied Psychology at the University of Birmingham and works at Think Psychology, the independent psychology practice he founded, which offers therapy, supervision, and training.