Graham Armstrong - coachGrazy
Founder.
Educator. Mentor. Leader in Fitness Business Transformation.
Graham Armstrong, known as coachGrazy, is the visionary founder of Team On Top and the On Top Performance Academy. A former finance professional and business consultant turned fitness entrepreneur, Graham brings a rare blend of business acumen, industry insight, and a passion for transformation.
With decades of experience as a personal trainer, accredited educator, and mentor, he has guided countless professionals to build careers and businesses they can be proud of. Having walked the path himself, Graham understands how overwhelming it can be to navigate the fitness industry and how vital it is to have the right guidance and tools.
That understanding led him to create Team On Top: a platform built on practical strategies, proven resources, and brutally honest coaching delivered by passionate, highly skilled mentors. More than just a training hub, it’s a thriving commercial health and fitness community where like-minded professionals connect, grow, and succeed together.
As a Founding Executive, Graham’s mission is to equip fitness professionals with the clarity, confidence, and systems to build lasting success, whether launching a side hustle, scaling a business, or forging a long-term career.
With coachGrazy at the helm, Team On Top is not just a resource — it’s a movement built on energy, connection, and growth.
Karla Gambell – coachKarla
Founding Team On Top Executive
Karla Gambell’s journey began in her late 30s, when she made the decision to turn her life around. Once unfit, stressed, and simply going through the motions, she committed herself to transformation, a choice that ignited a 14-year journey of discipline, resilience, and personal reinvention.
Through dedication and relentless effort, Karla built not just an extraordinary physique but the deeper qualities of true success: mental toughness, humility, and an unshakable mindset. Along the way, she trained and competed at elite levels, ran a thriving commercial gym, and achieved decades of success in the fitness industry.
Today, Karla is internationally recognised as a coach, motivational speaker, and mentor. But her true passion lies in service, guiding others to rise. As a Founding Executive of Team On Top, she devotes her energy to mentoring the next generation of fitness professionals, helping them build safe, sustainable, and rewarding careers.
Her philosophy is clear: fitness is not about vanity or ego, but about authenticity, humility, and caring for the wellbeing of others. She believes that true success is measured by the lives we elevate along the way.
“True success isn’t measured by what we achieve for ourselves, but by the lives we elevate along the way.”
George Mariolis – coachGeorge
Founding Team On Top Executive
George Mariolis is a force in the coaching world, part philosopher, part practitioner, and a relentless advocate for human potential. With four decades of experience, he blends compassion, knowledge, and conviction to inspire transformation at every level.
An academic powerhouse, George holds degrees in Psychology, Anthropology, Sport Psychology, Philosophy, Evolutionary Anthropology, Exercise and Sport Science, and Strength & Conditioning. Beyond the classroom, he has spent more than 40 years coaching professional athletes across multiple sporting disciplines.
As Owner and CEO of The Mariolis Method: Move – Think – Evolve, and former Owner of Definition Fitness Centre, George built his philosophy on one principle: surface-level changes create surface-level results. His holistic coaching method fuses cutting-edge science with timeless wisdom to reshape how people think, move, and evolve.
Now, as a Founding Executive of Team On Top and the On Top Performance Academy, George brings his beautifully brutal, direct, and deeply authentic coaching style to the community. He dismantles excuses, empowers clients with evidence-based strategies, and creates lasting transformation that ripples through every area of life.
Move. Think. Evolve.
Relentless. Raw. Revolutionary.
