Meet our Bariatric Surgeons and Medical Team

We welcome you to read the biographies of our bariatric surgery doctors surgeons and staff. In addition to gastric sleeve, gastric bypass and gastric banding surgeons, our staff is comprised of therapists, coordinators, and nutritionists to ensure the quality of your experience with our multidisciplinary team.

Dr. Manish Singh

Dr. Manish Singh

Medical Director, Advanced Laparoscopic & Bariatric Surgery; Adjunct Associate Professor, Department of Surgery, University of Texas Health Science Center at San Antonio (UTHSCSA).

Board certified in general surgery. Member of the American College of Surgeons, Society of American Gastrointestinal and Endoscopic Surgeons, and the American Society of Metabolic and Bariatric Surgery. Completed a fellowship in Advanced Laparoscopic and Bariatric Surgery at Cleveland Clinic in Ohio. Conducted extensive and ground-breaking research in weight-loss surgical procedures. Published multiple articles and book chapters on topics of bariatric and laparoscopic surgery.

Dr. Robert E. AlleynDr. Robert E. Alleyn

Advanced Laparoscopic & Bariatric Surgery; Adjunct Associate Professor, Department of Surgery, University of Texas Health Science Center at San Antonio (UTHSCSA).

US Army Veteran of the 475th MASH unit in Saudi Arabia and Iraq. Certified by the American Board of General Surgery and American College of Surgeons. A member of the Society of American Gastrointestinal and Endoscopic Surgeons and American Society for Metabolic and Bariatric Surgery. Adjunct Associate Professor of Surgery, University of Texas Health Science Center-San Antonio-Rio Grande Valley.

Dr. Ambrosio Hernandez

Dr. Ambrosio Hernandez

Advanced Laparoscopic & Bariatric Surgery for Adults & Adolescents.

Board certified in pediatric and general surgery by the American College of Surgeons. Member of the American Pediatric Surgical Association, Society of American Gastrointestional and Endoscopic Surgeons, American Society for Metabolic and Bariatric Surgery, and International Pediatric Endosurgery Group.

Completed fellowships at the University of Michigan Department of Surgery, U.T. Medical Branch, and at the Cleveland Clinic.

Dr. Michael Martinez

Dr. Michael Martinez

Advanced Laparoscopic and Bariatric Surgery

Board certified in general surgery with specialty training in advanced minimally invasive and bariatric surgery.  Member of the American College of Surgeons, Society of American Gastrointestinal and Endoscopic Surgeons, and the American Society of Metabolic and Bariatric Surgery.

Obtained undergraduate degree from Princeton University, medical school degree from Yale School of Medicine, and general surgery training at Baylor/Scott & White Hospital.  Completed a primary fellowship in Advanced Laparoscopic and Bariatric Surgery at the University of South Florida in Tampa, Florida.  Published research on topics of bariatric and laparoscopic surgery.   Special clinical and research interests in the “Super Obese” population (BMI >50).

Dr. Guadalupe Sharpe

Dr. Guadalupe Sharpe

Psychiatrist

Board certified in Psychiatry and Neurology.  Member of the American Society of Addiction Medicine.  Conducted extensive research in and published articles about psychiatry and medical ethics.  Fluent in English and Spanish.

Dr. Belinda Jordan

Dr. Belinda Jordan

Obesity Medicine Physician.

Board certified in family medicine, and a diplomat in the American Board of Obesity of Medicine.

A member of the American Medical Association, American Academy of Family Medicine, American Society for Metabolic and Bariatric Surgery, and American Society of Bariatric Physicians. Underwent bariatric surgery in 2005, providing her patients with a unique perspective given her personal experience and professional expertise. She provides pre- and post-operative care for bariatric surgery patients. She also provides physician-supervised medical weight loss programs for non-surgical or post-surgical patients.

If you would like to meet with our bariatric surgeons or medical staff, sign up for one of our weight loss seminars or call us at 956.362.5673.