Born in Sydney, Australia, John moved to New Zealand in his early teens. He studied for 7 years at Victoria University, Wellington, New Zealand, and graduated in 1995 with BA. Hons (1st Class). MA. Dip. Clin. Psych. His thesis received publication in the New Zealand Journal of Sports Medicine (1998). He is currently registered as a psychologist in NSW (PS0101897), and is a member of the Australian Psychological Society.
John trained as a clinical psychologist and has been working in different settings for the last 14 years. He initially worked extensively in the public sector (forensic services, hospitals, emergency services), before running his own private practice for the past 10 years. In terms of media, John was first discovered in a supermarket in 2001, and was later asked to audition for a relationship show. From this point on, he has hosted and provided expert commentary on a number of TV shows (currently a weekly regular on Channel 9's Mornings With Kerri-Anne), has had a nationwide weekly relationship advice radio show, and continues to be featured in several lifestyle magazines. In 2005, he released his first book, U-TURN: Putting You Back Into Your Relationship, and a second book is due for release in 2010. He has become a sought-after speaker as well as presenter of seminars and workshops.