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Meet the Team

Mary Schaefer Driscoll

Owner, Certified Personal Trainer, and Nutrition Coach

Mary is a 2000 graduate of Hershey High School. She graduated from Penn State University in 2004, where she played Field Hockey and studied Kinesiology.  Mary has been a certified personal trainer since 2004, and has helped thousands of individuals meet their fitness goals!  She is also an NCAA and International Field Hockey Umpire.  She opened Mary’s Health and Fitness in 2015, and enjoys training individuals at all fitness levels!

Andy Billingsley

MTC Director of Operations

Andy is 2011 graduate of Hershey High School where he ran Cross Country and was the captain of the Lacrosse team and an Academic All-American. He graduated from Cornell University in 2015 with a degree in Operations Research and Information Engineering. After college, he worked in Los Angeles and NYC for Red Bull and Venmo before moving back to Hershey over the pandemic. Andy brings his engineering and business background to help grow and strategize the MHF and MTC brands.

Katie Kosovac

MTC Team Lead, Certified Personal Trainer

Katie is a Certified Personal Trainer through the American Council of Exercise (ACE). She was a two-sport collegiate athlete playing both soccer and basketball for Penn State Harrisburg where she earned a B.S. in Kinesiology. In her free time, she enjoys spending time with my family and friends.

Rhyan Socash

Certified Personal Trainer

Rhyan graduated from Red Land High School in 2018 then went on to complete her degree in Kinesiology at Penn State Harrisburg in 2022. Her professional journey began with an internship at Mary’s Health and Fitness, where she gained valuable experience. Rhyan furthered her expertise by working at various local fitness centers. Throughout her collegiate years she played soccer and despite facing the challenges of three ACL injuries, she remained resilient. These experiences sparked her passion for injury prevention and rehabilitation. Rhyan is driven by the desire to make a positive impact, drawing from her own journey in overcoming challenges in the realms of fitness and injury management.

Stefanie Cassel

Certified Personal Trainer

Stefanie is from Ontario, Canada. She graduated from Edinboro University in 2021 with her B.S. in Exercise Science and is a recent graduate of the University of New Mexico with her M.S. in Physical Education. Stefanie was a collegiate athlete, earning countless recognitions including x6 All American and 15 PSAC championship titles. She is currently training for the 2024 Olympic Trials.

Matt Yansick

Certified Personal Trainer

Matt is originally from New Jersey and found a love for resistance training and fitness through high school sports.  He recently graduated with his Bachelor of Science in Exercise Science from Lebanon Valley College and is finishing his Doctor of Physical Therapy degree at LVC. He is excited to work with clients to help them crush their individual goals and maximize their health!