Associate Professor Dato’ Dr Nik Ritza Kosai Nik Mahmood , graduated for university of St Andrews,Scotland with Bsc Med Sci followed with MBChB from Manchester university. He underwent Basic and higher Specialist Surgical training in the North West of England Deanery rotation leading to FRCS Gen Surgery and CCST. He joined Universiti Kebangsaan Malaysia in January 2011 and is currently the Head of Upper Gastrointestinal, Metabolic and Bariatric Surgical unit at the Faculty of Medicine. Since commencing his post in 2011 , he has established the UGI and Bariatrics unit at Hospital Canselor Tuanku Muhriz , PPUKM making it the country premier and the main referral centre for treatment for Upper Gastrointestinal Cancers and Obesity Disorder. This centre has since performed more than 1500 Bariatric and Metabolic surgeries, the most in Malaysia. He is currently very active in research in particular obesity , Upper GI cancers and helicobacter Pylori including international collaborations. He has published over 100 peer reviewed publications, book chapters, expert opinion catalogues, magazines and newspapers articles. He is currently the examiner for the MRCS ( Royal College of Surgeons of Edinburgh), Conjoint Masters of Surgery and External Examiner at Universiti Sains Malaysia. He Sits in the committee for the Subspeciality Upper GI training in Malaysia and the national Guidelines for Bariatric surgery and the National Obesity Guidelines.He is currently the president of the Malaysian Metabolic and Bariatric Surgical Society, Vice president of Malaysian Upper GI Society and President of Malaysia chapter of IFSO ( International Federation of Surgery for Obesity. As being one of the key opinion leader for his field, he has been invited as a speaker and faculty at numerous national and international conferences and surgical workshops. He has also appeared on numerous occasions on Radio and Televison shows.