Our Team
Trauma Center

Kenneth R. Fretwell, M.D., F.A.C.S

Chairman of Department of Surgery

Currently the Chairman of the Department of Surgery, Dr. Kenneth Fretwell has worked for Jamaica Hospital Medical Center for over eighteen years. A Cornell University Medical Center trained General Surgeon, Dr. Fretwell joined Jamaica Hospital in 1995 and was promoted to the Director of Surgical Intensive Care Unit shortly thereafter. He has served as the Chairman of the Anesthesia & Invasive Procedures Committee and currently holds a seat on the medical board at Jamaica Hospital. Dr. Fretwell has been a Clinical Assistant Professor of Surgery at Cornell University Medical Center since 2006. He has won many awards through the years including the Dewitt Award in Surgery as well as the Chief Resident Teaching Award. Dr. Fretwell is a Fellow of the American College of Surgeons.


Sebastian D. Schubl, M.D.

Trauma Medical Director

Sebastian D. Schubl is an Attending Surgeon and the Medical Director of Trauma Services at Jamaica Hospital. Dr. Schubl received his Medical Doctor Degree from the University Of Virginia School Of Medicine. Dr. Schubl partook in a one year internship in General Surgery at Louisiana State University before receiving his residency training at New York-Presbyterian Hospital Weill Cornell Medical Center. He is the recipient of the Association of Academic Surgeons Resident Research Award. He serves on the board of the Jamaica Hospital Institutional Review Board. He has many years of research experience and has had much of his research published.


Vanessa P. Ho, M.D., M.P.H.

Associate Director of Trauma

Dr. Vanessa Ho is an Attending Surgeon and the Associate Trauma Medical Director at Jamaica Hospital Medical Center. She received her medical degree from Northwestern University and trained in general surgery at the New York Presbyterian Hospital-Weill Cornell Medical Center. This was followed by a fellowship in Trauma and Surgical Critical Care at the University of Medicine and Dentistry of New Jersey in Newark, New Jersey. She has a strong interest in clinical outcomes research, and obtained a Master of Public Health from Columbia University. She has published in medical journals such as Surgery, Surgical Endoscopy, and Surgical Infections, and has presented her research at national and regional surgical and trauma meetings.


Jeffery Chan, M.D.

Director of Surgical Intensive Care Unit

Currently the Director of the Surgical Intensive Care Unit, Dr. Jeffery Chan received a Bachelor’s Degree in Chemistry and his Medical Doctor Degree from Boston University. Dr. Chan received his residency training at New York Hospital – Cornell Medical Center. He is the recipient of the New York Presbyterian Hospital-Weill Cornell College Department of Surgery Faculty Teaching Award. Dr. Chan has collaborated on various research projects throughout his career in areas of Biology, Chemistry, and Urology, and has been published in the Journal of Chemical Physics.


Alfredo S. Wong, M.D.

Trauma Attending

Dr. Wong has been practicing surgery for over 25 years. As an American College of Surgeon Fellow, Dr. Wong has held various positions throughout his career, including the Director of Surgical Intensive Care Unit and Associate Director of Trauma for Mary Immaculate Hospital. Most recently, he is an Attending Surgeon at Jamaica Hospital. Considered a widely recognized Surgeon, Dr. Wong has presented in conferences all over the country. Dr. Wong has had his work published in the Journal of Injury of the British Trauma Society.


Natalie J. Hubbard, M.D.

Trauma Attending

Dr. Hubbard is a General Surgeon at Jamaica Hospital Medical Center, specializing in Minimal Invasive, Hernia Repair, and Abdominal Wall Reconstruction. Having received her Medical Doctoral Degree from the University of Michigan, Dr. Hubbard has postdoctoral training from Henry Ford Hospital in Detroit and a fellowship from North Shore/LIJ. Her honors and accomplishments include the Columbia University Kluge Scholar, Outstanding Surgical Intern, Cyrus Levinthal Prize in Biology, and Advanced MIS Fellowship MasterClass Skills Contest Winner. Dr. Hubbard has given many presentations and has had her work published in the Journal of Surgical Endoscopy.


Beverly Brown, R.N.

Trauma Program Manager

Currently the Trauma Program Manager, Beverly received her Bachelor’s Degree in Health Administration from Saint Joseph’s College and her Master’s of Science Degree in Health Administration from Central Michigan University. Certified in both Basic Cardiovascular Life Support and Advanced Cardiovascular Life Support, Beverly has been a nurse for 20 years. She was an Emergency Room Nurse for many years before becoming the Clinical Nurse Manager at Kingsbrook Jewish Medical Center. Prior to joining Jamaica Hospital, Beverly was the Director of Nursing for The Amsterdam at Harborside Retirement Community in Nassau County. Ms. Brown serves on various medical, nursing and policy-making committees and is a United States Army Veteran.