David Key has designed and delivered outdoor programmes for psychological wellbeing and sustainability to a wide diversity of organisations and individuals for nearly 30 years. He has also taught, supervised and researched extensively in the academic sector. He is published in several languages.

Keith Tudor is Professor of Psychotherapy at Auckland University of Technology, Aotearoa New Zealand, where he is currently engaged in establishing an entity for Research in the Psychological Therapies. He is the author of over 300 peer-reviewed publications, including 17 books.