Meet Our Coaches

 Our staff is incredible. They are passionate about teaching, encouraging and having FUN. 


Shari Mann and Jonathan Liddle | Owners

Shari and Jonathan started Authority Gymnastics in March of 2010. Founded on the philosophy of building stronger futures

Shari was a 1981 World Championship Team member and attended Arizona State University on an athletic scholarship where she achieved her Masters in Education. Shari is an esteemed coach, teaching some of the top athletes in the world, including Olympian Jaycee Phelps and World Championship Team member Sandy Woolsey. Shari is one of 20 certified judges at the International Brevet level, meaning she can judge internationally and Olympic level competitions. 

Jonathan began coaching in 1989 working at top clubs in the Flagstaff area. He was awarded the Arizona Uneven Bar Coach of the Year in 2001 and was a nominee for Arizona Coach of the Year in 2002. Jonathan is safety certified, meet director certified and a certified skill evaluator. 


Coach Cassi | Team Coach

Cassi comes to us from the Windy City of Chicago, Illinois.  Her second home was Illinois Gymnastics Institute (IGI).

Cassi spent 15 years in gymnastics.  She trained at level 9 and 10 for 3 years while also training to compete at the pre-elite level.  She has three state championship titles, and has competed in over 5 regional competitions and two national ones.  

In her early years of gymnastics, she qualified within the TOPS program and made it to Marta and Bela Karolyi's ranch.  Her favorite event was balance beam.


Coach Mel |  Team & League

Coach Megan | League & Recreational

Coach Sydney F. | League & Recreational

Coach Allie | Recreational

Coach Grace | Recreational

Coach Sydney Y. | Recreational