Matt Heintzelman, CSCS, TSAC-F, USAW-L1

Founder, Personal Trainer,

Head Strength Coach at Susquehanna University

Matt graduated from Penn State University in 2014 with a degree in Kinesiology. Since then, he's worked in all facets of personal training within a wide range of demographics including collegiate athletics, post-rehabilitation, obesity, firefighters, and other special populations (Multiple Sclerosis, paraplegic, cancer, osteoporosis, and more). His primary certifications include maintaining a Certified Strength and Conditioning Specialist (CSCS) as well as a Tactical Strength and Conditioning Facilitator (TSAC-F), both earned through the National Strength and Conditioning Association (NSCA).

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Matt has no problems discussing his own personal fitness journey, and uses it as a teaching mechanism for his own clients. Like many former athletes, Matt struggled with weight gain during life after sport. He has since lost more than 100 pounds, and feels more equipped to connect with clients who also struggle with weight gain. Matt is able to draw from his own experiences to better assist those going through similar struggles.

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In addition to operations at the Titan Tactical Facility, Matt also contracts as the Head Strength Coach at Susquehanna University for their athletes, working with all varsity sports teams.

Cindy Murphy, NSCA-CPT, ACE Certified

Director of Parkinson's Programs, 

Personal Trainer, Senior Fitness Specialist

After 20 years of working in the corporate world, all the while teaching group fitness classes at local churches and schools, she turned her dream and her passion of encouraging and equipping others to be successful in reaching their fitness goals into a career. Cindy went back to school and earned her degree in applied science as a Physical Fitness Specialist from Pennsylvania College of Technology. As an NSCA certified personal trainer and an ACE certified group fitness instructor, Cindy has over 30 years of experience in the fitness industry.

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In addition to other specialty certifications she has achieved, Cindy specializes in training the Parkinson’s population. She is the first in the Greater Susquehanna Valley to establish and facilitate Parkinson’s fitness programs that include PWR!Moves, Boxing for Parkinson's, and a Pedaling for Parkinson’s class.

Cindy enjoys training clients of all ages and levels, but her biggest demographic is the baby boomers. This generation wants it all ̶ to keep up with their grandchildren, be stronger, have more energy, maintain independence, socialize with friends and engage in recreational sports. At the same time, this population may have less balance, trouble getting out of a chair, difficulty carrying groceries, battle weight issues, live with one or more metabolic diseases or need to recover from replacement surgery. Helping her clients attain their goals and live fuller, heathier, pain-free lives is what Cindy is passionate about doing.

Cindy spends her free time weight training, cycling, playing volleyball and watching “Ninja Warrior”….and wishing she was one! She has completed three MS 150-mile bike rides for the MS society and plays volleyball year-round locally and competitively for Lokahi East Coast Senior Volleyball Club.

Carl Stull, NPTI-Certified, Westside Barbell

Personal Trainer, Powerlifting Coach

Carl’s passion for strength and fitness started in a small powerlifting gym called “Mike and Humps” in 2004. After training with the strength athletes in the gym and learning some of their methods, Carl decided he wanted to learn more about strength, fitness, and the human body. He attended the National Personal Training Institute (NPTI) in Philadelphia, PA and graduated with a diploma and certifications in Personal Training and Nutritional Consultation, which includes 100 hours of theory, 100 hours of Nutrition, 100 hours of Anatomy and Physiology, and 200 hours of practical application under his instructors, trainers, and strength coach Barry Fritz, Karl Safran, and Lenny Graham.

During and after this time Carl also competed in powerlifting, trained with a multitude of different strength athletes from all over, and currently strives to learn more from as many athletes, trainers, health professionals, and strength coaches as possible. So far Carl has worked with clients who have a goal to lose weight and/or change body composition, athletes, and people who are looking to live a healthier lifestyle.

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Carl is completing specialty training through Westside Barbell, founded by Louie Simmons, a pioneer in the powerlifting and strength training realm. By continuing to build on his extensive knowledge, Carl plans to continually broaden the demographics that he works with, and looks forward to working with anyone who dreams for a better version of themselves.

Cross Kantz, MS, ACSM-CPT

Personal Trainer, Nutrition Coach, Assistant Strength Coach at Susquehanna University

Cross Kantz, an American College of Sports Medicine (ACSM) Certified Personal Trainer, received his Bachelor’s Degree in Sports and Dietetics Nutrition from Mansfield University, and his Master’s Degree in Exercise Science from the University of South Florida. 

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His passion for health and fitness all started when he was a kid. He loved playing sports growing up, but he was always self conscious about the way he looked. Eventually, he started lifting weights and became hooked instantly on how it made him look and feel. It didn’t take long before Cross developed an interest in nutrition, knowing it played a huge role in losing weight and gaining muscle. He experimented with many different diets and supplements thinking they would work; but the thing was, he was dead wrong. 

He never quit training and experimenting and kept pushing forward and studying up on the real science behind nutrition and muscle and strength adaptations. He now knows what can work and what doesn’t work when it comes to achieving a goal centered around health and fitness. Whether working with someone who wants to lose weight, gain muscle, improve athletic performance, or improve dietary habits to live a healthier lifestyle, Cross is here to help them unleash their full potential and achieve remarkable results without having to endure all the struggles he had prior to achieving his current fitness results.

Marcy Schaeffer, Parkinson's Certified Instructor

Parkinson's Coach

Following retirement from HP, Marcy returned to the Susquehanna Valley. In 2017, she volunteered to assist Cindy Murphy with PWR!Moves classes. Marcy is now one of our dedicated Parkinson's Coaches, and is responsible for designing and implementing the Circuit classes, and also helps to coach the PWR!Moves classes at Titan.

Her interest in learning more about Parkinson's, and gaining a better understanding of the disease, has led her to participate in the Michael J. Fox Foundation's Parkinson's Progression Markers Initiative (https://www.ppmi-info.org/). This research project follows thousands of individuals with varied connections to Parkinson’s: clinical and genetic risk factors, recently diagnosed and with disease for over a decade, and control volunteers. It was through this research that the Foundation was able to identify a biomarker for diagnosing Parkinson's.

Annette Metzger

Administrative Assistant

Seven years ago, Annette stepped into the gym with the intention of improving her physical shape and losing weight.  What she never expected was to find a gym that felt like home. She started with personal training, added in Women on Weights, and finally Nutrition counseling, finding success with all.

Annette never considered herself a "gym rat" but feels more at home at Titan than she has ever felt in a gym. She loves it here so much that, short of setting up a cot and living here, she joined the staff in 2025 as an administrative assistant. Annette is that smiling face you see when you walk in the gym and is always feeling “peachy keen!” She will be here to greet members, assist with payments, and add support for the Parkinson's classes. She helps make your experience here the best it can be.

In her free time, Annette loves to cook, travel, and - with her husband - spend as much time visiting their two children and grandchildren as time allows.