Dr Ken Loi is a specialist Upper Gastrointestinal Surgeon with appointment at St George Public and Private Hospital, Kareena Private and Sutherland Public Hospital. He has performed more then three thousand advanced laparoscopic surgeries including primary and revisional bariatric operations. He has studied extensively about Bariatric surgery since 2002 and advanced his experience from USA and Australia. Currently he holds the position of Regional Chairman NSW RACS and also Secretary/Treasure of IFSO-APC ( Asian-Pacific chapter). He has numerous publications and has been an invited speaker for local and international meetings and conferences. Since 2003 Dr Ken Loi has been involved in setting up Multi-displinary surgical weight loss programmes in St George Private Hospital and also from 2009 in Sutherland Public hospital for (SESAHS - South-Eastern Sydney Area Health Service). He has performed thousands of Bariatric operations with good results and minimal complications. Currently he holds the advisory role with DoHA (Department of Health and Ageing) in facilitating new Bariatric surgery item number classification and NCCC (National Case-mix Classification Centre) in funding for bariatric surgery. Besides bariatric surgery, Dr Ken Loi also has extensive experience in Advanced Upper Gastrointestinal Laparoscopic surgery including laparoscopic hernia repair, oncology surgery and Endoscopy.