Patrick M. O’Neil is Professor of Psychiatry and Behavioral Sciences at the Medical University of South Carolina, where he is Director of the Weight Management Center. He received his BS in Economics from Louisiana State University and his MS and PhD in Clinical Psychology from the University of Georgia. Dr. O'Neil has been professionally involved in obesity since 1977 in numerous clinical, teaching, research and public education roles. He directs a long-standing multi-disciplinary weight management center. His teaching activities include supervision of psychology interns, lectures to medical students and other trainee groups, and invited continuing medical education lectures. He is and has been principal investigator for a large number of externally funded clinical trials of weight-loss agents. He is the author of more than 100 professional publications, chapters, and presentations, primarily concerning obesity and its management.

Dr. O'Neil is an Associate Editor of the journal Surgery for Obesity and Related Diseases and a member of the Editorial Boards of the journals Obesity (formerly Obesity Research), Eating Behaviors and International Journal of Obesity. He is a longstanding active member of The Obesity Society (formerly NAASO), and has served as Councilor, Vice-President, President-Elect and President. He is a former member of the Committee on Military Nutrition Research of the Institute of Medicine.

Closer to home, Dr. O'Neil served as a member of the Scientific Council of the South Carolina Nutrition Research Consortium throughout its existence. He is a former member and Chair of the South Carolina Board of Examiners in Psychology, and Past President of the South Carolina Academy of Professional Psychologists.