Peter Mayfield
Peter Mayfield is a long-term social entrepreneur deeply passionate about the transformative benefits people experience through a profound connection with nature.
He has journeyed from two decades as a world-class rock climber and guide (1978–1998) to founding and growing CityRock, the world’s first full-service climbing gym (1990–1996). Peter then launched Yosemite Guides, offering eco-tours for park visitors and environmental literacy field trips for school groups (1998–2004).
In 2006, Peter founded Gateway Mountain Center, an innovative nonprofit that has served more than 30,000 youth through environmental literacy, mountain adventure, and nature-based sensory immersion programs at Donner Summit. At Gateway, he developed a clinically supervised, nature-based therapeutic mentoring program for youth and young adults facing severe emotional disturbance, complex trauma, and substance dependence. This became the first program of its kind in the U.S. to secure County Behavioral Health contracts and Medicaid reimbursement, marking a breakthrough in integrating nature-based therapy into mainstream mental health care.
Today, Peter is channeling his decades of experience into NatureUP Health, advancing proven nature-based methods and systems to improve health and wellbeing at scale.
Greg Bernstein
Greg Bernstein leads product development, user experience, and technical implementation of NatureUP Health’s AI-powered nature therapy platform.
Greg’s path to building health technology runs through 30 years of hands-on work connecting people with nature. As a mountain guide, he led people through challenging outdoor experiences. In Yosemite, he served on search and rescue operations. In South America, he worked in environmental and human rights advocacy. Above the Arctic Circle and across the globe, he captured nature’s power as an Emmy Award-winning videographer and filmmaker for clients including National Geographic, ESPN, and environmental organizations.
The most formative chapter was eight years at Gateway Mountain Center, where Greg worked as a therapeutic mentor for youth facing serious emotional disturbance, complex trauma, and suicidal ideation. Starting as a backcountry field guide, he advanced through the mentoring program and into upper management. He developed deep, practiced expertise in motivational interviewing and non-violent communication, working with teenagers who needed authentic human connection above all else.
At NatureUP Health, Greg is building the product he needed at his worst moments: an AI guide that helps people access the transformative power of intentional time in nature, wherever they are.
Nigel Snoad
Nigel Snoad brings 25 years of experience building products and businesses at the intersection of AI, science, and social impact. He has incubated and launched products and businesses that make people, communities, and the planet healthier and safer, repeatedly building teams that generate sustainable impact at massive scale by integrating software, AI, science, data, automation, policy, operations, and design.
His career spans roles as soil scientist, physicist, AI researcher, privacy specialist, climate lobbyist, humanitarian, and startup founder, all united by curiosity and a focus on health and planetary wellbeing at scale.
Robert Suarez
Robert Suarez is the Co-Founder and Managing Director of Reuseful, a hybrid venture lab and pre-seed funding firm focused on Waste-to-Value Solutions. He has led award-winning design and innovation teams as an executive and director at IDEO, Planet Home, and Singularity Labs, and as a founding member of technology startups in FinTech, Music, and Action Sports.
Robert holds a BFA in Industrial Design from Carnegie Mellon University and an MS in Biomimicry from Arizona State University. He holds multiple design awards and drives solutions that integrate social, environmental, and educational considerations while proving that purpose and profit can combine for the greatest impact.
Kathleen Tebb, PhD
Kathleen Tebb, Ph.D., is a developmental and health research psychologist whose research focuses on developing, evaluating, implementing, and disseminating evidence-based interventions to promote health equity among diverse and underserved adolescents, young adults, and their families. Her specific areas of study involve understanding and promoting factors that contribute to positive youth development, health behaviors, and resilience among adolescents and young adults, with an emphasis on sexual and reproductive health.
Dr. Tebb’s work has targeted multiple levels, including individuals, health care providers, parents, schools, communities, and public policy. She has also developed interactive, individually tailored mobile-health, computer-based interventions to promote adolescent and young adult health. She has a long-standing commitment to community-based participatory, patient-centered research. As principal and co-investigator, over the past two decades, she has conducted large, randomized control trials that have engaged stakeholders in the development and evaluation of health interventions.
Michael Karch, M.D., FAAOS
Michael Karch, M.D., FAAOS, is a board-certified orthopedic surgeon at Mammoth Orthopedic Institute in California's Eastern Sierra, a Fellow of the American Academy of Orthopaedic Surgeons, and the co-founder and medical director of Brava Health. Beyond his surgical practice, Dr. Karch is the author of two books on artificial intelligence, reflecting a deep engagement with how emerging technology is reshaping medicine and human performance. His unique combination of clinical expertise, entrepreneurial leadership at Brava Health, and published thought leadership on AI positions him at the forefront of innovation-driven healthcare. As a physician who lives and practices in one of the country's premier mountain communities, he brings a firsthand understanding of how active lifestyles, nature, and technology intersect to support long-term health outcomes.