Dr. Mattar is Professor of Surgery and Chief of the Weight Loss and Metabolic Surgery Division at Baylor College of Medicine, where he is also Mentorship Director. He has held senior faculty positions at Oregon Health & Science University and at Indiana University where he developed successful comprehensive bariatric programs. He is also Past-President of the American Society of Metabolic and Bariatric Surgeons and Past-President of the Fellowship Council. His practice is almost entirely bariatric in nature and his main clinical interests are in the area of standardizing pathways and optimizing patient outcomes. He also has an interest in the surgical and endoscopic treatment of acid reflux disease. He has developed comprehensive bariatric and metabolic programs with an emphasis on modern, high quality and compassionate care that squarely places the patient at the center. He has published numerous articles and book chapters in the field and he enjoys teaching and advocating for his patients.