​Meet ​Our Team

Julie McCallen, M.D.

President of Cenegenics® Denver

Dr. Julie McCallen is the President of Cenegenics® Denver. She is board-certified in Family Medicine, a member of the Endocrine Society, the International Hormone Society, American Academy of Family Physicians, and the Age Management Medicine Group. After earning an undergraduate degree in Biochemistry from Cornell University, Dr. McCallen received her MD from the University of Pittsburgh School Of Medicine in 1990. She completed her residency in Family Medicine at the University of Wyoming-Casper in 1993.

Dr. Eipe Kuruvila

Center Physician

Dr. Kuruvila attended medical school at JIPMER, Pondicherry, one of the top medical schools in India. His graduate training was in the UK, including anesthesiology at The University of Bristol Hospitals followed by Higher Professional training at The Middlesex Hospital. He later attended Medical School in London for another four years. He and his family moved from London to Denver after they fell in love with skiing in the Alps. Dr. Kuruvila completed his fellowship in Anesthesiology and Pain Management at the University of Colorado Health Sciences Center in Denver.

Tim Watt, M.D.

Center Physician

Tim J Watt, MD, FAANS, and FAAAAM is certified by the American Board of Neurological Surgery and The American Board of Anti-Aging Medicine. He has completed the Advanced Fellowship in Anti-Aging, Functional, and Regenerative Medicine of The American Academy of Anti-Aging Medicine. Dr. Watt is a co author of the written board exam in Anti-Aging Medicine and was a medical editor and contributing author to The Physicians Guide to Anti-Aging Medicine and The Encyclopedia of Clinical Anti-Aging Medicine. Dr. Watt attended Wichita State University and the University of Kansas School of Medicine.

Dr. Watt is currently doing The Fellowship in Age Management Medicine working at Cenegenics® Denver. He still practices Neurosurgery full time in Rapid City, South Dakota, where he is part owner in a Surgical Specialty Hospital.

Jared Sparr

Certified Personal Trainer

Jared earned his BA in Adult Fitness and Exercise Science from Metro State University, with a minor in nutrition. As an NSCA-certified master level strength and conditioning specialist for the past eight years, Jared has a deep passion for helping people achieve their health and strength goals. He has trained many professional athletes, from skiers and football players to hockey and baseball players, along with many collegiate athletes.

Rod McCallen

Certified Personal Trainer

Rod is an ACSM certified personal trainer. As a master merchant seaman, Rod has always attended carefully to his level of fitness. He joined Dr. McCallen at Cenegenics® in 2008 and has been instrumental in the growth and development of Cenegenics® Denver.

Jackie Twigg

Office Manager & Training Liaison

Jackie is our Patient Service Coordinator at the Denver office. She assists with patient inquiries, maintains day-to-day operations at the office, schedules patient visits and consults, and processes prescription fulfillment and lab requisitions. Jackie’s mother is a nurse which sparked her interest in the medical field at young age. Her passion to help others is what inspired her to seek a job with Cenegenics® Denver.