Our Team

The Princeton Longevity Center Staff Brings The Highest Levels Of Expertise To Your Care

All our physicians are American-trained and board-certified.

The Princeton Longevity Center’s staff’s knowledge and experience are unmatched by any other preventive medicine center in the region.

Doctors

David A Fein, MD

MEDICAL DIRECTOR / CEO

Nathan Ruch, MD

PREVENTATIVE MEDICINE - PRINCETON, NJ

Richard Berardi, DO, FACP, FACOI, DABLM

Internal Medicine - Princeton, NJ

Gerald Ngo, MD

Cardiologist - Princeton, NJ

Daniel Karlsberg, MD, FACC, FSCCT

Cardiologist - NEw York, ny

Michael B. Schwartz, DO

Internal Medicine - Shelton, CT

Sheila Chen, MD

INTERNAL MEDICINE - Fairfax, VA

Dietitians

Donna Hayek, RD

REGISTERED DIETITIAN - PRINCETON, NJ

Lori E. Skurbe, RDN, MPH, CDCES

Registered Dietitian - PRINCETON, NJ

Erin Botticelli, MS, RD, LDN

Registered Dietitian - Shelton, CT

Sandra Gollogly, RDN

Registered Dietitian - Fairfax, VA

Giavonna Hirtes, RD

Registered Dietitian - New York, NY

Emily Reich, RD, LD, CDN

Registered Dietitian - New York, NY

Exercise Physiologists

Dr. Harry Pino

Exercise PhysiologIST - NEW YORK, NY

Louis Degnan M.S, CPT, NSCA TSAC-F

EXERCISE PHYSIOLOGIST - PRINCETON, NJ

Abdollah Serajian, PhD, ACSM-EP

EXERCISE PHYSIOLOGIST - Fairfax, VA

Melvin Abraham, MS, ACSM

EXERCISE PHYSIOLOGIST - Shelton, CT

Aesha Tahir, MS, ACSM-CEP, NASM-CES

EXERCISE PHYSIOLOGIST - PRINCETON, NJ

Technicians & Clinical Staff

Darlene Chuva, RT (R, CT)

Senior Ct Technologist - PRINCETON, NJ

Nicole Grignoli RT (R, CT)

CT TECHNOLOGIST - NEW YORK, NY

Jake Lukenda

Lab Supervisor - Princeton, NJ

Kristina DeGrandi

Clinical Coordinator - SHELTON, CT

Patient Care Team

Andrea Lanza

DIRECTOR | PATIENT & CORPORATE SERVICES

Taylor Mallon

Manager, Patient Care Coordinator

Aleks Krajewski

Patient Care Coordinator

Samantha Freeman

Patient Care Coordinator

Management

Doug Cerminaro, MPA

COO

Jillian Rhodes

Office Manager - PRINCETON, NJ

Laura Thristino

OFFICE MANAGER - NEW YORK, NY

Jennifer Sgrott

OFFICE MANAGER - SHELTON, CT

Melisa McGeehan

Office Manager - Fairfax, VA

About David A Fein

Founder and Medical Director of the Princeton Longevity Center, Dr. David Fein has been a practicing physician with nearly 30 years of combined experience in Internal Medicine, Cardiovascular Diseases and Chronic Disease Prevention. He has traveled extensively to research the latest in medical advances, technology and wellness tools to incorporate into his nationally recognized preventive medicine center.

Dr. Fein is a Founding Member of the Society for Cardiovascular CT and remains one of the few Internists in the world that are Board Certified in Cardiac CT. He is an expert lecturer on topics such as Radiation Reduction Techniques and Coronary Artery Calcium Scoring in the clinical setting and has taught and certified hundreds of physicians to become proficient in the field of Cardiac CT.

He has also been invited nationally and internationally to speak at leading conferences on Preventive Medicine and lectures extensively on topics in preventive medicine, executive health, lifestyle management, and more. Additionally, Dr. Fein has been involved in developing health-related legislation in New Jersey.

A graduate of Franklin & Marshall College in Lancaster, PA, Dr. Fein received his medical degree from New York University School of Medicine and was elected to the Alpha Omega Alpha Medical Honor Society. Dr. Fein completed his residency training at Bellevue Hospital – New York University Medical Center and is Board Certified in Internal Medicine and Cardiac CT.

About Nathan Ruch

Dr. Ruch brings more than 20 years of clinical experience to Princeton Longevity. He focuses his practice on the applied science of longevity and his passion is partnering with patients to help them achieve their goals and maximize healthspan.

A graduate of the Pennsylvania State University College of Medicine, Dr. Ruch completed his residency at the Case Western Reserve University, MetroHealth Medical Center, and Cleveland Clinic Foundation program in Ohio. He is board certified by the American Board of Emergency Medicine and has been elected a Fellow by the American College of Emergency Physicians.

Prior to joining Princeton Longevity, he was Chief Executive Officer and Chief Medical Officer for a national emergency medicine group. He lives in Bucks County with his wife and three children.

About Richard Berardi

Richard Berardi, DO, FACP, FACOI, DABLM, is a Multiple board-certified internist and lifestyle physician. He received bachelor’s degrees in biology and biochemistry from Purdue University and his medical degree from the New York College of Osteopathic Medicine. He is certified in plant-based nutrition and Metabolic health and nutrition through Cornell University and is a Certified Blue Zone Physician. He has served as medical director in many capacities over his career, including for the Osteopathic internal medicine residency program at Overlook Medical Center; for Weigh to Live, a medically managed weight loss program he helped develop; at a skilled nursing facility through the COVID years; at an indigent population clinic; and even at the Passaic County Jail in correctional medicine. He has started multiple integrated medicine practices from inception and most recently served as President of the Board of Health for his city.

He is a firm believer in Diet and lifestyle as the foundation of prolonged health and cherishes the opportunities to help his patients improve and optimize their overall health meeting them at whatever juncture they currently are in their own health and wellness journeys.

He is most proud of his three sons, Mike, David, and John, his Grand daughter Giulia and their dogs Gabe and Elsa. He credits his wife of over 30 years, Anne, with his transformation from being a traditional medicine practitioner to a lifestyle medicine one. He is a proud lifetime member of the National Health Association and ACLM and promotes their values whenever possible with his peers and patients alike.

About Gerald Ngo

Dr. Ngo is board-certified by the American Board of Internal Medicine (ABIM) in Internal Medicine as well as Cardiovascular Disease. He is also board-certified in adult echocardiography, nuclear cardiology, and vascular interpretation.

Dr. Ngo received his doctorate from Rutgers New Jersey Medical School. He completed his internship and residency in Internal Medicine at Tufts Medical Center in Boston, MA. He completed his fellowship in Cardiovascular Medicine at Morristown Medical Center in Morristown, NJ.

Dr. Ngo is a fellow of the American College of Cardiology and has a special interest in preventive cardiology, preventive medicine, and integrating a healthy lifestyle with reducing cardiovascular risk factors.

Outside of work, Gerald Ngo exemplifies how he practices medicine. He is an active marathoner and an expert ski/snowboarder. He believes in a personalized approach to provide the highest quality of care and help each patient achieve optimal health.

About Daniel Karlsberg

Dr. Karlsberg is board certified by the American Board of Internal Medicine (ABIM) in both internal medicine and cardiovascular disease. Additionally, he holds board certifications in comprehensive echocardiography, nuclear cardiology, and cardiovascular CT. He is currently on the clinical faculty at NYU Langone Health in the Department of Medicine & Division of Cardiology.

Daniel Karlsberg graduated from the University of California and received his doctorate with honors from Sackler School of Medicine, Tel Aviv University. He then completed residency in internal medicine at the University of Colorado, followed by fellowship in cardiology at California Pacific Medical Center in San Francisco.

Dr. Karlsberg is a fellow of the American College of Cardiology and an active member of the American Society of Preventive Cardiology. As a preventive medicine physician, he has a special interest in the early diagnosis and management of cardiovascular disease, complex lipid disorders, and advanced cardiovascular imaging. Throughout his medical training and career, Dr. Karlsberg has been deeply involved in cardiovascular CT research and currently advises and teaches with the Society of Cardiovascular Computed Tomography (SCCT). Dr. Karlsberg maintains ongoing clinical research with both the Cardiovascular Research Foundation and The Lundquist Institute & Harbor-UCLA Medical Center.

Dr. Karlsberg is deeply passionate and enthusiastic about the intersection of healthcare and technology to empower and educate for better outcomes. He is honored to be part of the team at Princeton Longevity Center as Associate Medical Director where he maintains a practice that strives to improve health via prevention, early detection, and exceptional follow up. His sole goal is to work with you to create optimal health and wellness that are tailored to your needs.

About Michael B. Schwartz

Dr. Schwartz received his BS in Cardiorespiratory science from The State University of New York/Stony Brook in 1986 and graduated from the New York College of Osteopathic Medicine in 1990. He completed his internship and residency in Internal Medicine at the Yale University School of Medicine/Norwalk Hospital Program in 1994. He is Board certified in Internal Medicine by the ABIM.

Dr. Schwartz has received the ‘Patient’s Choice Award’ every year since 2008 as well as the ‘Most Compassionate Doctor Award’ every year since 2010. Most recently, he was awarded the America’s Most Honored Doctors – Top 10%, and was named one of Fairfield County’s “Top Doctors” by Moffly Media both in 2022.

Dr. Schwartz emphasizes preventative care to insure that his patient’s health is the primary focus of a comprehensive health care program.

Dr. Schwartz is accomplished in sports medicine and acts as the Chief Ringside Physician for Professional Boxing and Mixed Martial Arts (MMA) for the State of Connecticut as well as at the Mohegan Sun Casino and at the Foxwoods Resort Casino. Dr. Schwartz has written many publications on fighter safety and has testified in front of congress to promote safety in these sports. In 2011, as a testimony to his commitment to improving the safety and health of the professional boxer, Dr. Schwartz was inducted into the Connecticut Boxing Hall of Fame.

About Sheila Chen

Dr. Chen is board certified in Internal Medicine. She did her undergraduate training at MIT. She attended St. George’s University School of Medicine and completed her internship and residency at St. Barnabas Medical Center in Livingston, NJ. She has been in practice for over 10 years, and in addition to providing quality preventive care at Princeton Longevity Center, she is the founder of Dimensions Direct Primary Care.

Dr Chen’s focus is to provide quality care at all stages of life. In addition to her role in primary care, she also serves as medical director of Heartland Hospice in Northern Virginia.

For Dr. Chen, medicine is not only a career, but a passion. She believes in a personalized approach, and strives to be the kind of physician patients can feel comfortable talking to. She is committed to providing the highest quality of care and treatment to her patients, and places special emphasis on overall health and wellness, preventive care and patient education.

About Donna Hayek

Donna Hayek, RD brings over 20 years of experience as a registered dietitian to our Princeton office.

Prior to joining Princeton Longevity Center, Donna worked in various hospitals, long-term care facilities, gyms, and clinics. She received her BS in Food & Nutrition and Certificate in Sports Nutrition & Wellness from The College of St. Elizabeth in nearby Morristown, NJ. Donna is also certified as an Exercise Physiologist through the American College of Sports Medicine (ACSM.)

Throughout her career, Donna has worked with a wide range of patients, including pediatric, obstetric, adult, and elderly. In her spare time, she enjoys working out, shopping, and spending time with her puppy.

About Lori E. Skurbe

Lori has been a registered dietitian for over 20 years with an extensive background in weight management, diabetes education, metabolic disorders and wellness. Prior to joining PLC, Lori worked in community wellness, public health, and clinical nutrition.

She received her bachelor of science from Penn State University and her Master of Public Health from Rutgers University. Lori is passionate about helping people achieve maximum health through optimal nutrition.

About Erin Botticelli

Erin Botticelli is our Registered Dietitian in Shelton, CT. She is a graduate of Salem State University with a Bachelor of Science in Biology. After graduation, Erin was a published research assistant in the Neuroendocrine Lab at Massachusetts General Hospital, investigating the MEG-3 gene in Pituitary tumors. Erin also earned her Master of Science in Nutrition and Health Promotion from Simmons University where she completed their Sports Nutrition and Entrepreneurship certificate program. Erin completed her dietetic supervised practice hours at several locations in Boston and Virginia, including New England Baptist Hospital, and Virginia Commonwealth University Athletics.

Prior to joining PLC, Erin was Head Dietitian at a medical weight loss clinic in Foxboro, MA. Erin has extensive experience treating obesity and metabolic conditions through behavior change and lifestyle medicine. Currently, Erin also works in the private practice space with focuses on gut health, integrative weight loss and functional nutrition. Erin’s specific nutrition areas of interest include integrative obesity and metabolic health, and sustainable weight management.

Erin resides in New England, specifically the Massachusetts and New Hampshire areas. Outside of helping people with nutrition she enjoys yoga, oceanside walks, playing with her two cats, cooking and spending time with her family.

About Sandra Gollogly

Sandra Gollogly is a Registered Dietitian Nutritionist at Princeton Longevity Center’s Fairfax, Virginia office.

Sandra graduated from the State University of New York with a Bachelor of Science Degree in General Management & Clinical Dietetics. She also completed a dietetic internship from Perth Amboy Medical Center, in New Jersey with a Clinical and Management focus. In 2011, Sandra received her Certificate of Training in Adult Weight Management from the Commission on Dietetic Registration.

Sandra believes in the importance of empowering and motivating her clients to meet their health goals. She takes a holistic approach by recommending small tweaks, and shifts to food choices and routines. She partners with clients to identify strategies to overcome obstacles, with the ultimate goal of client health and happiness.

Most recently, Sandra has worked at a Rehabilitation and Health Care Center caring for residents and families with a wide range of health concerns such as diabetes, cardiac health, cancer, wound healing, and weight management. She has also provided outpatient and inpatient medical nutritional counseling, and wrote and taught a nutrition program curriculum for youth. Sandra has been affiliated with the Academy of Nutrition and Dietetics for over 25 years.

In the warm weather you can often find Sandra working in her vegetable garden and experimenting with new plant varieties. (Ask her about her trial run with brussel sprouts!) Year round you can find her hiking in Virginia, or entertaining family and friends! She loves to cook and modify recipes to be healthier; but she will never sacrifice taste!

About Giavonna Hirtes

Our Registered Dietitian Nutritionist, Giavonna Hirtes, has 10 years of experience in the field of food and nutrition.

Prior to joining Princeton Longevity Center, Giavonna has worked in a variety of positions within the nutrition space. She has gained experience in her career in clinical inpatient and outpatient nutrition, retail dietetics, and working with our armed forces at a joint military installation.

Giavonna received her BS in Food and Nutrition with a Concentration in Dietetics and competed her Dietetic Internship through Montclair State University in Upper Montclair, NJ. Giavonna has also completed her Diabetes Lifestyle Coach training as well as earning her Certificate of Training for Obesity in Adults.

Throughout her career, Giavonna has worked with a wide range of patients, including pediatric, adult, and geriatrics, as well as physically active individuals and members of the armed forces. When not working with patients, Giavonna enjoys spending quality time with her family, cooking and baking, and spending time at the beach.

About Emily Reich

Emily Reich, RD, LD, CDN is a Registered Dietitian at Princeton Longevity Center, where she specializes in integrative and functional nutrition approaches for complex chronic conditions. She received her nutrition education at Stony Brook University and The University of Alabama.

Currently pursuing her Doctor of Clinical Nutrition, her doctoral research focuses on the intersection of gut microbiome optimization and metabolic health in complex chronic disease management. Prior to joining Princeton Longevity Center, Emily cultivated expertise across diverse clinical settings, including corporate wellness programs and private practice specializing in medically complex patients. Her clinical focus encompasses gastrointestinal disorders, autoimmune conditions, metabolic dysfunction, and hormonal conditions.

Emily resides on Long Island in New York. Outside of her clinical pursuits, she enjoys traveling, hiking, reading, and spending time with her husband and new puppy.

About Harry Pino

Dr. Pino joins Princeton Longevity Center as the Manager for Exercise Physiology and is board certified in Exercise Physiology with the American Society of Exercise Physiology and the American College of Sports Medicine. As a graduate of Indiana and Pacific Western University with post graduate training at Florida Hospital, Dr. Pino is also the founder of the sports performance lab VO2max Medical, LLC and is an adjunct assistant clinical professor at Tufts University, School of Medicine.

Dr. Pino is regarded as one of the leading authorities on sports performance testing, health and fitness and healthy weight loss in the United States. He is has consulted for both the Puerto Rican and Japanese Olympic Team and is the immediate past president for the Massachusetts Association of Clinical Exercise Physiologists. Dr. Pino is a former Director of the Clinical Exercise Physiology Program at Tufts Medical Center and has also served as the Senior Clinical Exercise Physiologist for the Center for Musculoskeletal Care Sports Performance Center at NYU Medical Center Langone, as the Medical Director for the Center for Preventive Medicine in NYC, as a Consultant for Next Level Physio Sports Performance and Physical Therapy Center, as a Clinical Integration Director for Celebration Health at Florida Hospital, and as a member on the Board of Directors for the Greater New York American College of Sports Medicine Chapter.

In addition to these accomplishments, Dr. Pino’s work has been featured on The Today Show, Good Morning America, PBS, CBS and CNN and in a variety of print media including the New York Times, New York Times Magazine, LA Times, Wall Street Journal, Shape, Men’s Health and more. Dr. Pino contributes to Sirius XM Doctor Radio and lectures on topics including exercise prescription for sports performance and chronic diseases. He was named one of the 100 Most Influential People in Central Florida for his work at the Rippe Health Assessment at Celebration.

About Louis Degnan

Louis Degnan, M.S., is a National Strength & Conditioning Association Certified Personal Trainer and a National Strength & Conditioning Association Tactical Strength & Conditioning Facilitator

Prior to joining The Princeton Longevity Center, Louis was a Wellness Coordinator at a United Methodist Homes in his hometown of Wilkes-Barre, Pennsylvania. He also worked as a Personal Trainer, EKG/Telemetry Technician, and Physical Therapy Aide both during and upon completion of his graduate coursework.

Louis received his Bachelor’s from East Stroudsburg University and his Master’s Degree from Bloomsburg University, both in Exercise Science. With his education and experience, Louis’ career goal is to make himself and expert in preventive medicine throughout the lifespan. Louis has experience in working with adults of all ages and recreationally active populations in physical therapy clinics, hospitals, commercial gyms, and group settings.

In his spare time, Louis is a self-proclaimed “comic book nerd”. He attends various comic book conventions annually and passionately incorporates healthy lifestyle and fitness habits to look the super-hero part in costume.

About Abdollah Serajian

Abdollah earned his Bachelor’s degree in Exercise Sciences from Ferdowsi University of Iran. He went on to complete his Master’s in Exercise Physiology, followed by his PhD in Neuromuscular Exercise Physiology from Shahid Beheshti University of Iran. He is also a graduate of the Fencing Coaching Course from the International Fencing Federation (FIE) and the University of Budapest.
Motivated by his career as a fencer for the National Fencing Team of Iran, Abdollah chose to pursue education in Sport Sciences. His goal was to enhance athletic performance. He strongly advocates for the preventive benefits of exercise in disease management and improving overall quality of life. Abdollah has always been passionate about assisting others in enhancing their health through exercise.

While in Iran, he served as an Exercise Physiologist, aiding numerous individuals in reaching their fitness objectives. Additionally, he played a significant role as the Coach of the National Fencing Teams of Iran. Upon immigration, Abdollah continued his journey as an Exercise Physiologist at PLC. He also continued his involvement in fencing, leading as a Fencing Head Coach, and establishing his own fencing academy.

Beyond these accomplishments, Abdollah contributed his expertise as a lecturer in various Iranian colleges, covering subjects such as Exercise Physiology, Exercise Science, Conditioning, and other Exercise Science-related courses. Notably, he held the position of Head of the Talent Identification Committee at the Fencing Federation of Iran.

During his leisure time, Abdollah indulges in watching movies, cherishing moments with his family, and exploring the scenic beauty of Northern Virginia.

About Melvin Abraham

Melvin is an ACSM- certified Clinical Exercise physiologist. He earned his Bachelor’s degree in exercise science along with a minor in psychology from Lehman college. He further pursued masters in exercise science focusing on Exercise physiology and sports nutrition from Long Island University. During his undergraduate years, he was interning at St Barnabas Hospital in both Inpatient and Outpatient Rehabilitation where he worked with cardiopulmonary, orthopedics, geriatrics, neurological and pediatric patients.

During his senior year in college he started interning for Westchester physical therapy group during the summer and later started working for the group as a physical therapy aide. After bachelor’s, he got promoted to be an Exercise specialist/ office manager while he pursued his masters. While he was working, he focused on patients with Lymphedema, Parkinson’s disease, arthritis, cerebral palsy, muscular dystrophy, cystic fibrosis, neurology, cancer, osteoporosis and pelvic floor disorders. He also worked with Sleepy hollow high school athletes to prevent injuries and to increase their cardiovascular stability for different sports. While he was doing his masters, he also worked with the NCAA Division I LIU men’s basketball team to run Vo2max tests and organize workout routines.

Apart from his professional life, during his free time Melvin loves to do photography, paint and sketch. He has been drawing since he was 6 years old and has won different awards while he was growing up. He is a huge soccer fan and keeps tracks of every national leagues. He loves to travel and go for long drives to explore and capture memorable moments with his friends.

About Aesha Tahir

Aesha brings over 15 years of experience helping busy professionals optimize their health and performance. She holds a master’s degree in Exercise Science from Concordia University Chicago, one of the nation’s top-ranked programs. Aesha began her career as a Spinning® Master Instructor, combining her expertise in coaching and exercise science to inspire others toward lasting wellness. At Princeton Longevity Center, she integrates her background as a clinical exercise physiologist, fitness nutritionist, author, and wellness speaker to help clients add healthy, high-performing years to their lives.