About Us

At Sierra Xplosion we believe that hard work, dedication and empowering each other through positivity is what makes our program successful. Many life lessons can be learned through competitive cheer by experiencing comradery, building trust and learning the importance of respect amongst their fellow athletes and coaches.


Our program will push your athlete to achieve their goals and motivate them with positive reinforcement. We will encourage your athlete but expect motivated athletes to walk through the doors. We expect our athletes to have positive attitudes, respectful behavior towards coaches, parents and other athletes. We want champions in life and on the mat.

Andrea Kneiss

Owner & Coach

Andrea has extensive experience and training in the sport of cheerleading.  She has always had a strong passion for cheer.  At the young age of 5, she dreamed of being a cheerleader as she would watch her older sister cheer under the Friday night lights.  As she grew up she fulfilled her dream and exceeded her ultimate goal by cheering at the junior college and university level.  She then had the opportunity to coach collegiate cheer at her Alma Mater for 3 years while simultaneously coaching for the high school cheerleading team at the school she taught at.  She has previously worked as the Stunt Coordinator and Assistant Coach for Summerville High School in Tuolumne, CA. Andrea holds her Stunting and Spirit Certification from the National Federation of State High School Associations and is certified by the American Association of Cheerleading Administrators.  She is also a certified Level 1-4 USASF instructor.


Kailee Goss 


Kailee was born and raised in Oakdale, CA but has recently relocated to Tuolumne. She attended Oakdale high and cheered all four years. She cheered competitively for 10+ years. Over that time she won 10+ national titles!! Her biggest goal in her cheerleading career was to compete at the world championships, and she accomplished that goal in 2017.  She has helped coach pop warner, high school cheer and prep teams. She is currently the assistant cheer coach at Summerville high school.

Danielle Ribeira

Tumbling Instructor 

Price List 


Contract/ Handbook


18859 Microtronics Way

Sonora, CA 95379

Unit A-3