Co-Founder & Head of Performance
Phil Quirk
Phil Quirk is a respected thought leader in human performance, resilience, mental fitness, and leadership, with a career defined by innovation, impact, and excellence. He is the author of Legacy: Ancient Philosophy For Modern Minds, shortlisted for UK Business Book of the Year 2023, a testament to his ability to translate complex concepts and ancient Greek philosophy into actionable insights for human development.
Phil’s journey began with six years in the Royal Marine Commandos (1998–2004), followed by six years in the Royal Air Force (2008–2014), during which time he honed the mental and physical resilience that underpins his work today.
After leaving the military, Phil founded The Aether Principle and Limitless Group, merging his expertise in human performance and resilience to design and deliver cutting-edge programs for blue-chip clients. His influence extends beyond the corporate world into elite sports, coaching athletes such as Wimbledon tennis star Liam Broady, three-time Olympic gold medalist Ed Clancy, as well as former US & UK Special Forces members,.
In 2023, Phil launched Expedition Limitless, combining extreme adventure with purpose. The initiative has raised over £175,000 for charity, with a target of £200,000 in its third expedition in 2026, showcasing the resilience and teamwork that define his philosophy.
Phil’s blend of military experience, elite sports insight, and corporate expertise makes him a sought-after leader in resilience, leadership, and performance, inspiring individuals and organisations to unlock their limitless potential.