"Where we build happy,
healthy,
confident children."

Meet Our Staff

Ray Overmann

CEO and Owner


Ray Overmann is proud to be a homegrown St. Louisan. After gaining 10 years of teaching experience as a physical educator, he founded Olympia Gymnastics in 1979 in Florissant. He coached competitive gymnastics for the Parkway School District and for Olympia for 10 years. Ray earned a master’s degree in education from Southeast Missouri State. In 1992, he opened Team Central Gymnastics Academy in Maryland Heights, a non-profit gymnastics school, where he is the Executive Director. Ray remains involved with each location and believes in providing opportunities for children of all abilities. Olympia proudly employs more than 150 St. Louisans.

Dean Howren

Area Ninja Director


I was born and raised in St. Louis and I have spent the last12 years in youth development programming. 4 Years as a Summer Camp Director and Sports Coordinator with the Chesterfield YMCA and 3 years with the Wildwood YMCA as a Program Director overseeing youth and adult sports, summer camp, dance, gymnastics and teen and family programming. I joined the Olympia Team in August 2013. Youth Development and physical education is a passion of mine and I am thrilled to have the opportunity to work with families in the St. Louis area, helping to fulfill the Olympia Mission of building Happy, Healthy, Confident children. If you need any assistance or have questions on our programming please feel free to give me a call at 636-532-6909 or email me at dean@olympiagymnastics.org

Jennifer Phillips

Ninja City Ninja Director


I was a student at Olympiad North for eight years as a child. I loved the sport and was passionate about it. I went on to be a cheerleader at St. Charles High School. In 2004, I graduated from Maryville University with a Bachelor's degree in Chemistry and Biology. I worked as a specialist in the Air Pollution Control program for the St. Louis County Health Department for 5 years. At that time, I had my second child and decided to be a stay-at-home mom. My kids (now three of them) attended Olympia Manchester since they were very young. After my third was born, my husband and I started rock climbing and training for obstacle course competitions. I have now competed in several of them and advanced to the national level in the National Ninja League. I decided to go back to work part-time in 2016 at Olympia Manchester. I now teach tumble bees, girls gymnastics, cheer, and ninja; sharing my passion with children and loving every minute of it! I can be reached at ninjacity@olympiagymnastics.org

Katherine Pottorff

Ninja Director/St. Peters Location


As a young child I always wanted to do gymnastics, but it wasn't until I was 13 that I finally convinced my parents and they agreed on one condition; that if I wanted to take more classes I had to pay for them myself. So from this first class, I started saving and working all kinds of odd jobs. The skills I have learned from taking gymnastics were appealing; discipline, determination, coordination and how it affected me mentally and physically. I started working as an instructor at Team Central at the age of 15. I am now the Ninja director and have been a part of the program since its inception. I am always available to answer questions and care for the needs of our ninja kids beginner - advanced. I can be reached at katherine@olympiagymnastics.org.

Corey Barger

Ninja Director/Ellisville Location


David Schaeffer

Ninja Director/Rock Hill Location


I have been doing gymnastics for many years, am a trained circus acrobat, martial artist, and tracuer (parkour dude!). I have a passion for life and movement and I love sharing my passion with others - It’s why I started teaching. I was on American Ninja Warrior in 2012. I can answer any questions regarding ninja at the Olympia Rock Hill location. You can reach me at david@olympiagymnastics.org.