He is a Certified Transactional Analyst and a Teaching and Supervising Transactional Analyst and a Provisional Member of the New Zealand Association of Psychotherapists. He is the series editor of Advancing Theory in Therapy, the editor of Psychotherapy and Politics International, and the co-editor of Ata: Journal of Psychotherapy Aotearoa New Zealand. He is also the author/editor of over 250 publications, including 12 books, the latest of which, The Turning Tide, is concerned with pluralism and partnership in psychotherapy in Aotearoa New Zealand. He has a private practice in West Auckland.