Meet the
Juggernaut Fitness Team

At Juggernaut Fitness, we’ve built a thriving community where everyone can succeed. With expert coaching and a top-tier training environment, we’re here to support you every step of the way on your wellness journey.

Meet Our Coaches

The coaching team at Juggernaut Fitness in Laconia, NH is dedicated to helping you achieve your fitness goals. With diverse specialties and years of experience, they’ll guide and inspire you every step of the way.

Keith Brittion owner of Juggernaut Fitness

Keith Brittion

Founder

Keith, originally from Sandown, New Hampshire, returned home after a career split between New York and Los Angeles. In 2012, he discovered functional fitness and decided to share his passion by opening a gym in the Lakes Region. This venture began in a single-car garage and had a simple mission: to help people improve themselves gradually. Keith and the Juggernaut community are committed to “Forging Positive Leadership” through their fitness journey.

Anna Terry owner of Juggernaut Fitness

Anna Terry

Owner

Anna Terry has earned her B.S in Physical Education, CrossFit Level 2 Trainer, CrossFit Defense certification and is a NASM Certified Nutrition Coach. Her goal as an owner is to create a safe space for ANYONE, regardless of age, goals, gender, injuries, etc. to become a better version of themselves through the path of health and fitness!

Matt Terry owner of Juggernaut Fitness

Matt Terry

Owner

Matt found CrossFit in 2013 and has been coaching since 2014, when he first obtained his CrossFit Level 1 Trainer certificate. Matt now holds his CrossFit Level 2 Trainer certificate and CrossFit Defense certifications. Matt spent over a decade in law enforcement and rose to the rank of Lieutenant before finding his true passion for helping others find healthier and happier lives through fitness.

Sara Fogg coach at Juggernaut Fitness

Sara Fogg

Operations Manager

Sara is the master of all trades when it comes to all things Juggernaut. She specializes in social media marketing, event planning, and customer service. In addition, she’s a Pre & Postnatal Fitness specialist, a knowledgeable guide to our mama Juggernauts through their special season of life. Sara is also a CrossFit Level 1 Trainer.

Lis Rosencrum coach at Juggernaut Fitness

Lis Rosencrum

Head Coach

Lis has been a Licensed and Certified Athletic Trainer and Certified Strength and Conditioning Specialist since 2006, and earned her PhD in Physical Education in 2014. She specializes in helping people of all levels safely participate in physical activity through corrective exercise and manual therapy techniques including Dry Needling, Instrument-Assisted Soft Tissue Mobilization, Cupping, and more. She found CrossFit in 2016 and fell in love with the environment and movements. She coaches classes and works one-on-one with clients to assist them toward their movement goals, with special focus on those who are returning from injury. Lis also is a CrossFit Level 1 Trainer.

Emily Hyde coach at Juggernaut Fitness

Emily Hyde

Head Nutrition Coach

Emily holds degrees in Exercise Science, Nutrition, and Human Nutrition and Functional Medicine. A Board-Certified Nutrition Specialist (2025) and Functional Nutritional Therapy Practitioner, she takes a holistic, science-based approach to health. With certifications in Precision Nutrition and CrossFit Level 1, she helps individuals achieve lasting health by addressing root causes, improving gut health, reducing inflammation, and correcting nutrient deficiencies through personalized nutrition, functional lab testing, and targeted supplementation.

Roxanne Stockwell coach at Juggernaut Fitness

Roxanne Stockwell

Client Success Manager

Roxanne has been a member of the Juggernaut Community since 2022, and is your helpful guide as you go through your journey with us!

Power lifting has always been a passion in her life and has afforded her opportunities to compete in the past. In her time outside of the box she works in management at a local Aerospace company, enjoys cheering for her daughter at sporting events and traveling the country by motorcycle with her boyfriend.

Jason Mangiardi coach at Juggernaut Fitness

Jason Mangiardi

Coach

Jason started classes at Juggernaut Fitness in 2013 after trying a number of different workout and exercise approaches. Although he had never been one to stick with any program for very long, he found the community and format of Juggernaut to be a great match for him. He has greatly appreciated the positive impact on his life and decided to pay it forward by coaching! He obtained his CrossFit Level 1 Trainer certificate in 2016 and advanced to his CrossFit Level 2 Trainer certificate in 2023. Jason works at Concord Hospital as an Ear, Nose and Throat surgeon and is the father of 2.

Corey Gately coach at Juggernaut Fitness

Corey Gately

Coach

Corey started at Juggernaut Fitness in 2016. She started with Bootcamp and has been here ever since! Corey is a CrossFit Level 2 Trainer and is also a Certified Drug and Alcohol Fitness Specialist. She is a Master’s Licensed Drug and Alcohol Counselor and is the Director of Substance Use Services for Concord Hospital Laconia and Franklin.

Jessica Chappuis coach at Juggernaut Fitness

Jessica Chappuis

Coach

Jess first found Juggernaut Fitness by joining UBCC in 2018 and quickly fell in love with CrossFit. She started coaching group classes in 2022 and is dedicated to helping others realize their full potential and reach their goals. Jess is a CrossFit Level 2 Trainer and holds an ISSA Certified Personal Training certification. Jess also has plenty of experience with personal training and helping others achieve their goals.

Deirdre Moulton-Gagne coach at Juggernaut Fitness

Deirdre Moulton-Gagne

Coach

Deirdre, a lifelong New Englander, initially struggled with health but found renewed purpose through motherhood. She pursued a college education in small business management while raising her two sons. In 2018, Deirdre decided to prioritize her well-being, aiming to be there for her children long-term. She joined a bootcamp and, upon her sister’s encouragement, attended classes at Juggernaut Fitness, initially feeling intimidated. However, her first experience during the Hero WOD, Murph, in Memorial Day 2019, revealed the inclusive and supportive community. Deirdre’s passion for this fitness style grew, leading her to earn her CrossFit Level 1 Trainer certificate in 2022 and become a coach at Juggernaut. She cherishes her family, friends, and the village that is Juggernaut Fitness, emphasizing love, support, and guidance in achieving holistic wellness.

Mike Rosencrum coach at Juggernaut Fitness

Mike Rosencrum

Coach

Mike has been a licensed Physical Therapist Assistant since 2012 with a certification in Aquatic Therapy. Mike is experienced in working with mature patient population in residential facilities. Mike has over 10 years of experience in training through the military and adult recreational settings. Mike has been training in CrossFit since 2015 and is a CrossFit Level 1 Trainer.

Cyndal Vansteensburg coach at Juggernaut Fitness

Cyndal Vansteensburg

Coach

Cyndal has a passion for CrossFit! She enjoys sharing her love for the sport with others. Prior to discovering CrossFit, she excelled in competitive swimming. High school also introduced Cyndal to the joys of track and field running, leading her to become a frequent gym-goer. Beyond CrossFit, Cyndal showcases her musical talents as the lead singer in a band and pursues a career in Real Estate. When not working, she cherishes quality time with herr family, often engaging in outdoor adventures! Cyndal is a CrossFit Level 1 Trainer.

James Rousse coach at Juggernaut Fitness

James Rousse

Coach

James is an enthusiastic coach with a vibrant personality. He brings his diverse background of rock climbing, martial arts, hiking, and years of personal training calisthenics and mobility to the table in order to empower those around him. His passion for uplifting others and his enthusiasm for celebrating wins, big or small, will make you want to join in the excitement. James currently holds a Bachelors degree in Exercise Science, a certification of Personal Training through NASM, and a level 1 Trainer Certificate through CrossFit.

coach ashley

Ashley Marsh

Engagement & Marketing Coordinator

Ashley is the Engagement and Marketing Coordinator, bringing a dynamic blend of creativity and strategy to her role. With a master’s degree in Social Media Marketing, she specializes in building meaningful connections and driving impactful campaigns. A dedicated fitness enthusiast who’s always loved the latest social trends, she brings the same energy and discipline to her professional work as she does to her wellness lifestyle.

High-Quality Gym Equipment

With advanced machines and versatile tools, Juggernaut Fitness provides everything you need for effective workouts. From treadmills and rowing machines to squat racks, kettlebells, and resistance bands, our equipment is designed to support cardio, strength training, and functional fitness goals.