Michael Dimock
Executive Director

Michael Dimock is an organizer and thought leader on food and farming systems and heads Roots of Change (ROC) a project of the Public Health Institute. ROC develops and campaigns for smart, incentive-based food and farm policies that position agriculture and food enterprises as solutions to critical challenges of the 21st century. Since 2006, Michael has been spawning and leading education and policy campaigns, community dialogues and creative engagements with government and corporate leaders to advance regenerative food and farm policies and practices that make agriculture and food enterprises solutions to critical public health challenges of the 21st century. His leadership has rendered one new law and funding program at the federal level and three new California laws that included two new funding programs and five successful budget requests. As a result, nearly $400 million in funding for improved nutrition has flowed to CBOs. He has been a player in passing regenerative agriculture policies that have resulted in $500 million in funding to provide farmers with incentives to reduce emissions and/or capture carbon and retain water in the soil and reduce the use of toxic chemicals. He is the host of the podcast Flipping the Table featuring honest conversations about food, farms and the future. Author, Katrina Fried, and Photographer, Paul Mobley, feature Michael in their book, Everyday Heroes: 50 Americans Changing the World.

He began his career in 1989 as a sales executive in Europe for agribusiness and in 1992 founded Ag Innovations Network to provide strategic planning for companies and governments seeking healthier food and agriculture. In 1996, he founded Slow Food Russian River and, from 2002 to 2007, he was Chairman of Slow Food USA and a member of Slow Food International’s board of directors. Michael’s love for agriculture and food systems grew from experiences on a 13,000-acre cattle ranch in Santa Clara County in his youth and a development project with Himalayan subsistence farmers in Nepal in 1979. In the 1980s, he was a campaign worker for California Governor Jerry Brown. Michael earned a BA in History with Honors at UCLA and a Master International Affairs at Columbia University.

Lesley Kroupa
Policy Director

Lesley serves as the Policy Director for Roots of Change and as the Policy Advisor for the Center for Wellness and Nutrition at the Public Health Institute. She is responsible for identifying and analyzing policy issues related to nutrition, health, and regenerative agriculture at the local, state, and federal level using both a health equity and food system framework. She is advocating for policies in Sacramento and Washington DC.

Previously, she was the Interim Deputy Director at the Laurie M. Tisch Center for Food, Education & Policy, Teachers College, Columbia University. There, she provided strategic policy recommendations for ongoing research projects and led advocacy campaigns related to nutrition policy and nutrition education programs.

Before joining the public health field, Lesley spent 11 years practicing law in New York City at Cooley LLP and as in-house counsel. Prior to law school, she worked at the United States Department of Justice in Washington, D.C. She has a B.A. in Government from Smith College, M.S. in Nutrition and Public Health from Teachers College, Columbia University, and J.D. from The University of Michigan Law School.

Doris Meier
Program Manager

Doris brings various business and management experiences to her position as Program Manager with Roots of Change.  For close to a decade, she directed an international education business and later worked as an organizational development consultant and business coach.  She was recently involved in a start-up company focused on building a story-telling platform for mission-driven brands to help consumers reconnect to the origins of the food they eat and make more ethical purchasing choices. She is very committed to facilitating the growth and success of Roots of Change and its community and to reaching the goal of establishing a sustainable, climate-smart food system in California by the year 2030.

Doris received a Bachelor’s degree in Humanities from New College of California and a Master’s degree in Organizational Psychology from Golden Gate University.  She grew up in a small farming town in the German-speaking part of Switzerland, is bi-lingual in German and English and speaks conversational French and Spanish. She worked in Switzerland for several years as an account manager with clients from all over Europe and has lived in England, France and Colombia. She has called the Bay Area her home for the past twenty-five years and is an avid photographer, traveler and cook…and loves to eat!


Dr. Raissa Sorgho
Director of Global Nutrition and Partnerships

Dr. Sorgho leads the design, development, and execution of three global human-centered food and nutrition programs in sub-Saharan Africa, southeast Asia, and Latin America. She investigates international policy and program application to the USA context to advance key markets, support sustainable agriculture, and protect the health of agricultural workers. Furthermore, Dr. Sorgho manages partnership growth, client development, and oversees the alignment of leadership strategies with health equity principles. Her international experience and expertise guides ROC’s expansion of work to include international projects related to nutrition and regenerative agriculture.

She completed her undergraduate studies at Bucknell University (USA), holds a master’s in public health and a doctorate in global health from Heidelberg University (Germany). Her expertise includes health (nutrition and heat), climate change (adaptation and sustainability), and policy (review and implementation), with an emphasis on evidence-based decision making. She has professional experience in conducting qualitative political economic analyses in southeast Asia, investigating the association between reducing greenhouse gas emissions and health co-benefits in western Europe, and implementing agro-biodiversification and nutrition randomized control trials in east and west Africa.

Carol Mills
Program Administrator, Finance & Operations

Carol Mills has 20 years of experience in grants administration, healthcare research and program and operations management.  Her current position entails providing financial and operational support for a portfolio of projects within the public health sector – budget development, financial forecasting, overseeing payables, expense tracking and overall financial management.  Carol’s career includes organizing community outreach programs to promote cancer awareness as well as collaborating with schools and local programs to develop key partnerships to address minority underrepresentation in Science, Technology, Engineering and Math (STEM).

Carol grew up on the Caribbean island of Barbados.  She has a B.S. in Business Administration and has worked in medical research centers and institutions of higher learning throughout the US including New York, Florida and most recently in Atlanta, Georgia.


Kathy Mossburg
Contract Lobbyist 

Kathy Mossburg is a member of Mosaic Solutions and Advocacy, a team of professional partners who are uniquely experienced in the world of public policy, public advocacy and association management. Prior to joining Mosaic Solutions and Advocacy, Kathy was a partner with MVM Strategy Group for 8 years, another Sacramento based lobbying and advocacy firm.

Kathy has been lobbing for over 20 years and has represented a wide range of clients broadly focused on public health and safety net issues since she first formed Mossburg and Associates in 1998.  She has a comprehensive knowledge of legislative, administrative and budget processes. In addition to ROC, she has successfully represented such clients as the Public Health Institute, San Francisco AIDS Foundation, Essential Access Health, California Association of Food Banks, California Food Policy Advocates and the Local Health Plans of California.

Bridget Shirvell
Social Media Editor

Bridget Shirvell is a New York-city based journalist. She has reported on a wide range of food, travel, and environmental subjects over the years for venues including VICECondé Nast Traveler, and Edible Communities. She has served as a digital strategist for Long Island Pulse Magazine, and Edible Holdings, an audience engagement specialist for PBS NewsHour, and a town reporter in Connecticut.

She holds a Master’s Degree in Journalism from the Quinnipiac University and a B.A. in Political Science from The George Washington University.

Courtney Grace
Podcast Producer

Courtney Grace is a sound designer, vocalist, and music producer based in the San Francisco Bay Area. She studied Sound Design at San Francisco State University and started her music and sound business, Courtney Grace Music and Sound in 2015. She has worked on several podcasts, films, and songs, and has worked on projects with Google and Skywalker Sound. Aside from work, she is very passionate about social justice issues, video editing, graphic design, and enjoys healthy foods and adventurous hikes in nature.

Matthew Marsom
Vice President for Public Policy and Programs, Public Health Institute

As Vice President for Public Policy and Programs for the Public Health Institute (PHI), Matthew works to advance and support the work of the organization’s domestic and global health programs, identifying opportunities to strengthen program impact and promote cross‐program collaboration. Matthew is also responsible for designing and implementing strategy for monitoring and influencing public policy, legislation and regulations affecting PHI projects and public health policy relevant to PHI interests. Previously, he was chief of the Policy, Partnerships and Planning Unit of the Cancer Prevention and Nutrition Section of the California Department of Public Health, providing support for policy development, legislative analysis and external relations. He also oversaw the policy and partnership activities of the Network for a Healthy California. Originally from the United Kingdom, Marsom was an advocate for community‐based child care organizations and an advisor for policy and strategy within the Early Years and Childcare Unit for the Department of Education and Skills. Mathew is a strategic advisor to the ROC team, helping us to develop pathways and partnerships that will increase our impact on public policy