Our Leadership


Kevin Boyer (he/him)
RAF Founding Director

Kevin Boyer is the Founding Director of the Regenerative Agriculture Foundation. Before starting RAF, he spent 5 years managing the Regenerative Rangelands and Composting programs at The 11th Hour Project of The Schmidt Family Foundation. Kevin has worked for several food and farm-related nonprofits, and he grew up in Tulare County, California (one of the agriculture capitals of the world) surrounded by conventional agriculture. He maintains an active role in a California citrus farm that is transitioning to regenerative practices.

Ahna Kruzic
Ahna Kruzic (she/her)
Associate Director

Ahna Kruzic (she/her) joined Regenerative Agriculture Foundation as Associate Director in March 2020. Ahna has a tremendous diversity of experience in nonprofit management, regenerative agriculture, and supporting farm and racial justice. Originally from southern Iowa, Ahna currently lives in Oakland and most recently served as Pesticide Action Network’s Communications and Media Director.  She holds a Master of Science in sustainable agriculture and sociology from Iowa State University, and has worked as community organizer, researcher, coalition-builder, publisher, and communicator. Prior to joining PAN, Ahna worked as Director of Publications and Communications at Food First / the Institute for Food and Development Policy. She has also served as the Interim Executive Director for the Women, Food and Agriculture Network in 2020.

Mark Muller
Mark Muller (he/him)
RAF Executive Director

Mark Muller came to RAF in March 2020 after spending over 20 years working on related issues including agricultural conservation, Midwest water quality, racial equity in the food system, and effective federal food and agricultural policy. Most recently Mark served as director of the Mississippi River program at the McKnight Foundation, and prior to that he directed the Food & Community Fellows program at the Institute for Agriculture and Trade Policy. He also spent two years teaching high school in New York City and 18 months volunteering in Honduras and Guatemala. He and his spouse and three children live in south Minneapolis.

Brett Ramey
Brett Ramey (he/him)
RAF Consultant

Brett Ramey (Iowa Tribe of Kansas and Nebraska) is an educator and organizer working at the intersections of environmental, cultural, and community health. He has been serving as a consultant for RAF since January 2021 and leading RAF’s “Restorying Regenerative Agriculture” program. His work is grounded in reclaiming and upholding knowledge systems that honor relationships and responsibilities to lands and waters. He previously served as director of the Doris Duke Conservation Scholars Program at the University of Washington, a community of young people who aim to transform the face, practice, and future of conservation.

Sallie Calhoun
Sallie Calhoun
RAF Board Chair

Sallie owns and manages Paicines Ranch, a 7,600-acre ranch in central California. She is an impact investor, activist, and philanthropic funder in regenerative agriculture. Her work focuses on improving the health of agricultural soils and sequestering carbon in soil to mitigate climate change, while creating healthier people and planet. She is the founder of the No Regrets Initiative, which seeks to use all available forms of capital—human, natural, investment, and philanthropic—to affect change in the agricultural system.

Prior to becoming a rancher and farmer, Sallie spent almost 25 years as an engineer, COO, and high-tech entrepreneur; she was co-founder of Globetrotter Software, Inc. where she served as COO/CFO. She is now the managing member of Cienega Capital, an impact investing firm, and the president of the Globetrotter Foundation, a family foundation.

Betsy Taylor
Betsy Taylor
RAF Board Member

For over thirty years, Betsy Taylor has built a solid reputation as a philanthropic advisor, social change leader, motivational speaker and problem solver. Betsy has led several non-profit groups and campaigns, served as Executive Director of the Ottinger Foundation, Stern Family Fund, and Merck Family Fund and currently advises a small number of donors and foundations.  Author of three books and frequent public speaker, Betsy Taylor is known for challenging her clients to think big and to tackle the root causes of social and ecological problems. She specializes in bringing diverse stakeholders together to achieve a shared vision in support of bold action for a better world.  For the past four years, Betsy has worked to build the field of regenerative agriculture through grant-making, network development, global convenings, and general cheerleading about the potential of our lands to sequester carbon pollution while boosting food security and habitat protection.

Sarah Bell
Sarah Bell
RAF Board Member

Sarah Bell is Program Director for Food and Agriculture at the 11th Hour Project, a program of the Schmidt Family Foundation. She joined the foundation in 2007 and launched the program in 2010. Her grantmaking focuses on the intersection of ecology, local economies, and equity in the U.S. She sits on the board of Pie Ranch in Pescadero, CA and is active in numerous funder affinity groups. She received her B.A. in English Literature and French from the University of Colorado and studied regenerative design in Northern California.

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