Michael Tarren-Sweeney is a Clinical Psychologist, Epidemiologist and Child Developmental Theorist. He is Associate Professor of Child and Family Psychology at Canterbury University in New Zealand (where he teaches postgraduate psychology trainees through to board registration), as well as a Consultant Clinical Psychologist for government and charitable children's agencies in Australia.

Arlene Vetere is Professor of Clinical Psychology and Deputy Director of the PsychD in clinical psychology at Surrey University, UK. She is Professor of Family Therapy and Systemic Practice at Diakonhjemmet University College, Oslo, Norway. She is a UKCP Registered Systemic Psychotherapist and HCPC Registered Clinical Psychologist.