John Barry is a chartered psychologist and Associate Fellow of the British Psychological Society, Honorary Lecturer in Psychology at University College London, UK. He is co-founder of the Male Psychology Network, and the Male Psychology Section of the British Psychological Society.
Roger Kingerlee is a consultant clinical psychologist and EMDR consultant at the Norfolk and Suffolk NHS Foundation Trust. Dr Kingerlee specialises in male and veteran psychologies and complex trauma. He is co-writer of the Veterans' Stabilisation Programme with The Walnut Tree Project, and a member of the Male Psychology Network.
Martin Seager is a consultant clinical psychologist with the UK charity Change, Grow, Live. He spent over 30 years as a senior clinician, supervisor and manager in the NHS. He is a writer, lecturer, broadcaster and activist in the mental health field and co-founder of the Male Psychology Network, and the Male Psychology Section of the British Psychological Society.
Luke Sullivan the founder and director of Men's Minds Matter, UK. Dr Sullivan specialises in psychological crisis interventions for people who are actively suicidal. He also works with the Lambeth Home Treatment Team, an NHS service that provides interventions to people at risk of suicide.

(From Goodreads)