He has performed well over 3500 weight loss surgery operations, including laparoscopic gastric banding, gastric sleeve resections and gastric bypass. His expertise in advanced laparoscopic techniques has enabled him to a improve the operation of gastric sleeve resection by completely over-sewing the staple line to reduce leaks and bleeding risks. In 2003, he founded the Institute of Weight Control and developed the 'Circle of Care' Program. The Circle of Care program arose in response to listening to patients needs and experiences, and realising that that they are better able to achieve their goals of weight control and a healthier lifestyle when supported by a team of health professionals, including physician, dietitians, psychologist, physiotherapists.