Matthew Sleppy, D.C.

After graduating from Penns Manor High school, Dr. Sleppy received a Bachelor of Science in Biology from Life University in Atlanta, Georgia. In 2002, Dr. Sleppy received his Doctorate of Chiropractic from Life University, graduating magna cum laude.

Dr. Sleppy has acquired advanced training in extremity injuries and golf injuries, for which he was developed a thorough understanding. Dr. Sleppy’s prior experience as a personal trainer has given him a unique insight into rehabilitation and wellness of the working body. Both his knowledge and experience have allowed him to develop a large spectrum of expertise in seven different chiropractic techniques, including pediatric care, pregnancy care and post-surgical.

Dr. Sleppy resides with his wife Jen and their four children Molly, Macey, Parker, and Patrick.

Gregory VanderBrook, D.C.

Dr. Gregory VanderBrook received his Bachelor of Science degree in Exercise Physiology from St. Bonaventure University in 2011. Soon after he received his Doctorate of Chiropractic from New York Chiropractic College in 2016. Dr. VanderBrook was awarded the Libero A. Violini award, given to those who exemplify a high level of excellence in patient care and chiropractic adjustment procedures. He has been practicing chiropractic for nearly two years in Greensburg.

Dr. VanderBrook’s previous experience as an Exercise Physiology major and his certification in whole foods nutrition has enabled him to have a better understanding into whole body wellness.

Dr. VanderBrook was born and raised in Finger Lakes, New York. He currently resides in Greensburg with his Fiancé, Shelby.

Dan McPherson, Nutritionist

Dan is a Nutritional Consultant certified by the Global Institute for Alternative Medicine and has also earned certifications in Educational Microscopy, Meridian Stress Assessment, Nutritional Response Testing and Personal Fitness Training. He has over ten years of clinical experience. Besides having his own office at Sleppy Chiropractic Family Wellness Center, he works with/for various health practitioners. Most notably, Dr. James Winer, of the Winer Wellness Center, Pittsburgh, PA. Dan is currently Director of Education for Nutritional Frontiers, one of the premier supplement companies in the natural health industry. His website is

Randi Eckenrode, Dietitian

Randi Eckenrode is a dietitian who specializes in dietetic counseling. She attended Indiana University of Pennsylvania, and from there she earned her bachelor’s degree in Dietetics in 2007. She began dietetic counseling in the fall of 2008 and has been practicing for the last 9 years. She married her husband in 2011 and they have two sons and one daughter.

  • Weight management
  • Meal planning
  • Food allergies (i.e. gluten, dairy, etc.)
  • Anorexia/bulimia
  • Diabetes
  • Medical conditions (i.e. IBS, Crohn’s disease, diverticulitis, gout, etc.)
  • Exercise & fitness implementation
  • Autoimmune diseases
  • Underweight children and elderly

Randi also created a 12-week “Get Fit” program which allows people to follow a nutrition plan for 12 weeks that focuses on overall health. The program teaches people how to eat healthy, find a balance that fits their lifestyle, and make changes that last a lifetime. During the 12 weeks, participants will be held accountable by a weekly individual weigh-in, given recipes and cover a new topic each week. This program has helped people reach their optimal health for the last 3 years.

Ronna Reininger, Licensed Massage Therapist

Ronna began her practice of massage therapy after graduating from the Pittsburgh School of Massage Therapy in 1999. She practices the modalities of: Swedish Massage, Neuromuscular and Trigger Point Therapy and Deep Tissue Massage. I have been practicing in the Indiana area for seventeen years. Massage adds to the dimension of total body wellness by providing comfort for the body, mind and spirit.

Shelby Walters, Acupuncturist

Shelby graduated from the Fin+ger Lakes School of Acupuncture and Oriental Medicine of New York Chiropractic College (NYCC) in Seneca Falls, NY. There she completed over 3,000 hours of intense didactic and clinical training to receive a Master’s of Science in Acupuncture and a Master’s of Science in Acupuncture and Oriental Medicine. Shelby is a licensed practitioner in both acupuncture and Chinese herbal medicine.
Traditional Chinese medicine treats a wide variety of conditions. It has been used for several thousand years to prevent and treat various diseases and medical conditions. The effectiveness and ability to manage these conditions has been recognized and supported by numerous organizations, including the World Health Organization (WHO) and National Institute of Health (NIH).

  • Acute & Chronic Conditions
  • Autoimmune Disorders
  • Neurological Conditions
  • Headaches
  • Digestive System Conditions
  • Men and Women’s Health
  • Adverse Symptoms to Chemotherapy & Radiation
  • Facial Rejuvenation
  • Labor & Delivery
  • Addiction
  • Mental & Emotional Health
  • Respiratory Health
  • Dermatology
  • Stress Management

Krista Herman, Office Manager

Krista Herman has been employed with Sleppy Chiropractic for the past 2 years. She moved into the position as the Office Manager in January 2017. The workload has transitioned from people to paper, but every now and then she is able to work with the patients to maintain her sanity.
Krista grew up in eastern PA and moved to the Indiana area in 1997 to attend IUP as a Pre-Physical Therapy major earning a Bachelor of Science degree in Natural Science. While at IUP, she was a member of the field hockey team. Although she is no longer a part of organized sports, she enjoys an active lifestyle. When Krista is not at work, her time is spent with her husband, Jared and their four kids, Mia, Ainsley, Sadie, and Elias.

Sharon Yurky, Office Staff

Sharon Yurky is one of the front desk workers for Sleppy Chiropractic. She has lived in Indiana with her husband Jim for 40 years. They have three dogs and a big back yard in which they spend much of their spare time. She also enjoys traveling and then scrapbooking the trips. She loves chocolate and can be easily bribed for a quick appointment.

Mary Kimmel, Office Staff

Mary started at Sleppy Chiropractic in April, 2014. She lives in Shelocta with her two Furry children; “daughters”, Lacey and Lola (dogs). Her favorite activities include kayaking, lap-swimming, and cross-country skiing, reading, movie nights with friends after horseback riding. Her bucket list includes learning how to waterski, jet-ski, and ride a motorcycle, meeting and marrying her husband, improving her downhill skiing and horseback riding skills. Mary would love to travel to South Africa to visit friends. Mary is a member of the Summit Church in Indiana where she serves on the youth leadership team (going on 17 years) and the tech team.

Carol Affolter, Office Staff

Carol recently joined the practice as one of the back/front desk workers. She is an IUP alumni and a long- time resident of Indiana. Although her background includes a degree in criminology and employment as a medical records librarian, she is enjoying this new season of life working in a chiropractic office. Outside of work, Carol enjoys being with her family and visiting friends. She also enjoys the outdoors and likes to travel.