Our Providers
Meet Our Providers
The St. Thomas East End Medical Center Corporation has a multidisciplinary team of medical providers and support staff. They include full-time medical doctors, physician’s assistants, nurse practitioners, registered nurses, licensed clinical social workers, support staff, etc.
The providers are available to each other for consultation, whether urgent or non-urgent care is necessary.
Tess Richards, M.D.
Executive Director
Madel Villegas, M.D.
Medical Director
Audria Thomas, M.D.
Jefferson Hendrickson, M.D.
Nachét Williams-Prince, DMSc, PA-C
Marcelle Forte-Guillaume, PA-C
Rachel Herman, APRN, MS, RN
Miriam Judy Turnbull, BSN, RN
Sharon Mainya, DDS
Lauren Gewinner, RDH
Sherlonda Adkins, DMSc, PA-C, MPA
Tess Quesenberry, PA-C
Tess Richards, M.D.
Executive Director
Dr. Tess G. Richards is a family medicine doctor trained to provide care for both adults and children. She attended the American University of the Caribbean Medical School in St. Maarten and did her residency at Cabarrus Family Medicine in North Carolina. Shortly after residency, she moved back home to St. Thomas, USVI where she was born and raised because her family on both sides have been in St. Thomas for many, many generations and she had a deep desire to give back to her community. In her spare time, Dr. Richards enjoys party planning, decorating homes, traveling all over the world, cooking, watching sitcoms and murder mysteries from the 70s and 80s, and, most importantly, spending time with her exceptionally large family.
Madel Villegas, M.D.
Medical Director
Audria Thomas, M.D.
Jefferson Hendrickson, M.D.
Dr. Jefferson Hendrickson is a highly experienced internal medicine physician, with over two decades dedicated to improving the health and well-being of his patients. Most recently, he practiced at MedStar Medical Group, where he had been providing comprehensive care since 2019. Before this, he served as a General Practitioner at Johns Hopkins Community Physicians from 2016 to 2019. Dr. Hendrickson completed his residency in internal medicine at Meharry Medical College, where he earned his MD in 2012, following an internship at Wake Forest Baptist Health Medical Center.
In addition to his medical training, Dr. Hendrickson holds a Master of Life Sciences from the University of Maryland and a Bachelor of Science in Biology from the University of the Virgin Islands. Prior to his medical career, he spent over a decade teaching science at the high school and middle school levels, bringing a unique perspective to patient care with a focus on education and preventive health.
Nachét Williams- Prince, DMSc, PA-C
Nachét J. Williams-Prince is a board-certified Physician Assistant and a native of the US Virgin Islands. Nachét graduated in 2002 from the University of the Virgin Islands with a Bachelor of Science Degree in Biology. She attended Shenandoah University in Winchester, Virginia where she graduated with a Master of Science degree in Physician Assistant Studies in 2004. Nachét completed her post-graduate internship with A.K. Medical Associates in Philadelphia from 2006-2007 and returned to St. Thomas in 2007 to practice Internal Medicine and Obstetrics/Gynecology at the St. Thomas East End Medical Center Corporation. She earned a Doctor of Medical Science at A.T. Still University in 2021. Dr. Williams-Prince enjoys spending time with her family and her hobbies include reading, watching trivia shows, and tennis.
Marcelle Forte-Guillaume, PA-C
Marcelle Forte-Guillaume is a dedicated and skilled Physician Assistant from Haiti with over a decade of experience in internal medicine and urgent care. She earned her Master’s Degree in Physician Assistant Studies from the University of Nebraska in 2017, following her Associate of Science in Physician Assistant Studies from Miami Dade College. Since then, she has worked as a Physician Assistant at many medical facilities across Florida. Dr. John Internal Medicine, providing comprehensive care to patients. Her diverse experience includes roles at South Florida Multispecialty Associates and Mercy Family and Urgent Care, where she focused on delivering high-quality healthcare in fast-paced environments. Fluent in English and Haitian Creole, Ms. Forte-Guillaume is committed to serving a diverse patient population with compassion, professionalism, and high-quality healthcare.
Rachel Herman, APRN, MS, RN
Rachel Herman is an accomplished Pediatric Nurse Practitioner (APNP, PPCNP-BC) with extensive experience in both clinical practice and education. With advanced degrees from the University of Iowa and Northern Illinois University, she has dedicated her career to pediatric care, serving in various roles, including as Medical Services Director and Pediatric Nurse Practitioner at the University of Wisconsin. Her professional expertise spans decades, with notable positions at Mayo Clinic, Kids First Pediatrics, and Winona State University, where she was a faculty member and Clinical Placement Coordinator.
In addition to her clinical work, she has contributed to health education through publications, guest lectures, and independent health consulting. Her leadership and commitment to pediatric health have made her a trusted figure in healthcare, with a passion for improving patient outcomes.
Miriam Judy Turnbull, BSN, RN
Miriam J. Turnbull graduated from the College of the Virgin Islands in 1986 with a Bachelor of Science in Nursing. For over 30 years, she has served the VI Community through the Nursing profession. She is delighted to be a part of the STEEMCC Family, serving in the capacity of Coordinator of Immunization Services. In addition to Nursing, Miriam is a published author and songwriter. She enjoys swimming, reading, and listening to music. She also loves spending time with her husband, sons, and grandsons.
Sharon Mainya, DDS
Lauren Gewinner, RDH
Lauren Gewinner was born and raised in St. Louis, Missouri, and has been practicing since receiving her degree in Dental Hygiene from Lewis and Clarke in 2003. In May 2007, Lauren decided to relocate to the Virgin Islands where she now calls home, and continued practicing on St. Thomas for over 10 years. Lauren started with the STEEMCC family in 2020. She looks forward to growth and continued service to the community. In her spare time, Lauren enjoys beaching, boating, dining, and gardening!
Sherlonda Adkins, DMSc, PA-C, MPA
Tess Quesenberry, PA-C
Members of the Board of Directors
Lisle A. Evelyn, Jr., MA, NRP, CPM
Chairperson
Cereese Lewis-Smith, RN, BSN
Vice-Chairperson
Stephen DeBlasio
Treasurer
Harriet Haynes
Secretary
Karl H. Callwood
Christopher Popple
LaVerne Slack