Staff – St. Louis, MO

nick - busines managerNick Bielke – Business Manager

Nick Bielke is the business manager for National Rejuvenation Centers of St. Louis. He has extensive finance and managing experience. Nick and his wife, Amy, have been together for 19 years and have two boys, Blake (7) and Grant (4). Once reaching the age of 35, he felt a lack of energy, poor sleep quality, and not getting results from his workouts. After starting the rejuvenation program, his overall health, energy level, and quality of life have improved so much that he is dedicated to bringing that success to patients in St. Louis.

courtney - office managerCourtney Layton – Office Manager

Courtney is a Medical Assistant who began her career in public health before moving on to Internal Medicine, Dermatology, and Integrative medicine. The last 3 years, Courtney has been working with Dr. Michael Schoenwalder DO, an internal medicine practice that specialized in thyroid disease and hormone replacement therapy. Courtney enjoys watching people regain their quality of life after starting on bio identical hormone replacement therapy.

Jeff - marketing directorJeff Wittmer – Marketing Director

Jeff is a former Olympic Weightlifter who began at the age of 10 in his home basement gym. Jeff’s father, Dr. Michael Wittmer, a former National level competitor himself had Jeff begin lifting weights to improve his ability in other sports. After a few months of training Jeff decided to enter his first meet and from there he had continued success by winning his first 50 competitions. After winning multiple Jr. Nationals after high school graduation he accepted an invitation to the Olympic Training Center in Colorado Springs, CO. He continued to compete throughout his mid-20s with success in national and international competitions and competed in the 2004 and 2008 Olympic team trials. Jeff earned his Bachelor Degree in Marketing from Lindenwood University and, also works for World Wide Technology as a Supply Chain Supervisor. Jeff also has taught weightlifting classes at local Crossfit gyms and serves as an instructor/demonstrator for Olympic Weightlifting seminars across the country.

Michael - clinical directorMichael Wittmer DC, Clinical Director

Dr. Wittmer has been in practice since 1980 after receiving his D.C. degree from Logan University in St. Louis, Missoui. Dr. Wittmerhas also been a faculty member at Logan University since 1984 until present day along with serving as Chief of Staff from 2010-2015. He is also a certified USA Weightlifting coach and served as a member of the USA Weightlifting Board of Directors. Since starting his practice, Dr. Wittmer, has helped thousands of patients and is committed to the best possible care for them. Dr. Wittmer has lead and assisted with continuing eduaction seminars for Doctors of Chiropractors, athletic trainers, along with personal trainers.