Senior Medical Leadership Team Dr. Susan Brien Senior Vice President Medical, Academic and Research Affairs Dr. Susan Brien is Senior Vice President Medical, Academic and Research Affairs… Dr. Nachiketa (Nachi) Sinha Regional Chief of Staff Dr. Nachiketa (Nachi) Sinha has been practicing as a consultant psychiatrist in… Dr. Martha Mills Chief of Staff, Fredericton area Dr. Martha Mills received her medical degree and residency training in Obstetrics… Dr. Ashley (Ash) McLellan Medical Director, Fredericton and Upper River Valley area Dr. Ashley McLellan grew up in Nackawic. He is a graduate of… Dr. Warren Giberson Chief of Staff, Moncton area A Fellow of the Royal College of Physicians and Surgeons of Canada… Dr. Jody Enright Medical Director, Moncton area Dr. Jody Enright has served as Medical Director for Moncton and the… Dr. Sanjay Siddhartha Chief of Staff, Miramichi area Dr. Sanjay Siddhartha received his medical degree from Medical College Raipur and… Dr. Eugene Mah Medical Director, Miramichi area A trained family medicine physician, Dr. Eugene Mah received his Bachelor of… Dr. Margot Burnell Chief of Staff, Saint John area Dr. Margot Burnell has served as Chief of Staff for the Saint… Dr. David Marr Medical Director, Saint John area Dr. David Marr has served as the Medical Director of the Saint… Dr. Gurpreet Singh Ranger Chief of Staff, Upper River Valley area Dr. Gurpreet Singh Ranger is a general and colorectal surgeon at Horizon’s… Clinical Department Heads Medical Imaging Emergency Department Family Medicine General Surgery Infection Prevention and Control Laboratory Medicine and Pathology Neuroscience and Stroke Program Obstetrics and Gynecology Pediatrics Psychiatry