Professor John W Toumbourou is based at Deakin University, Australia. He is the Chair in Health Psychology within the School of Psychology and a Leader in Prevention Sciences within the Centre for Social and Early Emotional Development (SEED: www.deakin.edu.au/seed). Apart from his Deakin roles, he serves as a voluntary Director of the not for profit company Communities That Care Ltd (www.communitiesthatcare.org.au), which has achieved Australia-wide reductions in youth substance use and antisocial behaviour (http://dx.doi.org/10.1037/hea0000735). He is a prominent researcher and social advocate in areas related to child and adolescent mental health promotion, and the prevention of alcohol and drug problems (www.deakin.edu.au/about-deakin/people/john-toumbourou).