Board of Directors

Board officers



Patricia Farrar-Rivas is a founding principal, as well as the CEO, of Veris Wealth Partners. She has been providing investment advisory and wealth management services since 1992. Patricia is a principal consultant to the Envestnet Sustainability Platform and was a member of the Envestnet Advisory Board. Patricia’s previous Board experience includes As You Sow, a nonprofit organization promoting corporate responsibility through shareholder advocacy, grant making, and innovative legal strategies. She also served as a member of the Standards Council for the Sustainability Accounting Standards Board (SASB), a nonprofit that works on developing and disseminating industry-specific sustainability accounting standards for material, nonfinancial (ESG) information.


Aaron Hardisty has been involved in food security and food education in the Bay Area since 2009. He began as a volunteer for Cooking Matters, then became a member of the Cooking Matters Advisory Committee. He joins 18 Reasons as board member after serving as a founding board member for Three Squares. Aaron is a Mission District resident who follows his kids as they scoot on 18th street between Mission and Dolores to shop at Bi-Rite Market, go to Community Dinner or grab dessert at Bi-Rite Creamery.


Ever since she was a child, Jessica Meksavan has loved food - eating it, sharing it, and combining ingredients, flavors, and textures to create something greater than the sum of its parts. Though she now spends her days in financial services focused on debt structuring and credit underwriting for technology companies in the Bay Area, Jessica is able to combine her love for cooking and sharing a meal with her finance skills set as Board Member of 18 Reasons. Jessica joined the board in 2016 and is currently the Treasurer of the Board of Directors. She lives in San Francisco with her husband and her daughter and strives to instill the same love and appreciation for food and shared meals with her two childem. 


Bob Rosner is founder, managing member, and portfolio manager of Buena Vista Fund Management. He is on the board of the UCSF investment company and serves on UCSF's Faculty and Student Life Committee. He is passionate about building an equitable Bay Area, running, and his dog. He earned his bachelor's degree from the University of California, Santa Cruz, and his MBA from the Stanford Graduate School of Business.


Board members



Calvin Tsay has always been at home in the kitchen, gathering inspiration from Julia Child and cooking meals for the family.  With over twenty years of strategic planning, financial analysis, and operations management experience, he has served as a consultant at Booz Allen & Hamilton, director of strategic planning at Macy’s, and general manager at Joie de Vivre Hospitality.  He has a BS and MBA from Stanford University and attended the Cordon Bleu in Paris where he learned that the key to any dish is to monter au beurre! 


Following a career as a chef, Sam Mogannam re-opened Bi-Rite Market in San Francisco’s Mission District in 1998 in the space his family had operated since 1964. Since then he’s opened Bi-Rite Creamery, founded 18 Reasons, and tilled ground on Bi-Rite’s own Sonoma farms. Sam co-authored Bi-Rite Market’s Eat Good Food: A Grocer’s Guide to Shopping, Cooking & Creating Community Through Food (Ten Speed Press, 2011). He volunteers on the Board of Directors for the National Association of the Specialty Food Trade (NASFT), for the Good Food Awards, and the Community Alliance with Family Farmers (CAFF). He’s the proud father of two girls. 


Sarah Nelson has worked on food-related projects in the Bay Area since 2008. She launched the Bay Area’s first Market Match, which gives farmers’ market customers who use food stamps extra funds to spend at the market, and a Veggie Rx program that helped diabetes patients increase their produce consumption while measuring positive health outcomes. Previously, she taught yoga and guided bicycle tours in France. In 2011, she founded the nonprofit Three Squares, which merged with 18 Reasons in 2013. She is passionate about cooking, rock climbing, riding her bike, and, yes, her job. She lives in San Francisco. Contact her at


Isaac Buwembo is a business designer and social entrepreneur passionate about finding a better way. He is the Design Strategy Lead at Year Up, supporting leadership with growth strategy and design research. He is Co-Founder of Civil Labs, an Oakland-based social enterprise supporting youth development in the Bay Area. Isaac is passionate about helping business and society find a better way through market-based mechanisms, localized solutions and social innovation. He believes that helping people be awesome can change the world. He holds a Masters in Business Administration in Design Strategy from California College of the Arts and a BSc. in Cell Biology and Genetics from University of British Columbia.


Maggie Spicer's earliest memories are of food and have guided her path ever since. From the curiosities of eggs to years of cooking holiday meals with her Southern grandmother, many of her fondest moments are centered around the stove and the farmers’ market. With a 15-year career in experience design and corporate event planning, along with a background in brand strategy and design thinking, she brings a unique skill set to the Board. Maggie was an early member of 18 Reasons (since 2009!) and runs an organic grocery & cafe, Douglas, as well as a creative event space centered at the intersection of food and art, Baana. She's a regular contributor to Edible SF and Ambrosia, and has served as Guest Editor for both Ambrosia and Drift magazines. Over the past 10 years, she has volunteered with Slow Food San Francisco, Slow Food Nation, Kitchen Table Advisors, and currently serves on the Events Committee for CUESA.


Rosabel has a had a life-long passion for eating – and more recently, Instapot home cooking. She believes that cooking, sharing food, and eating together builds relationships, promotes cultural understanding, and leads to better health. In addition to being an expert at eating, Rosabel specializes in corporate transformation. She helps bold ideas take root through creative, interdisciplinary marketing and communications programs to reimagine and elevate brands, products, and services. She lives in San Francisco’s Fillmore district with her husband and Goldendoodle fur-baby.


Shannon's earliest memories are of her extended Texas family coming together over white bread, frozen vegetables, and great barbeque. Today, she's happy for her local farmers market and for the many ways in which we build community around food. Shannon acts as an advisor and coach to mission-based organizations and their leaders and has led development teams at local nonprofits. Shannon is a trustee of the Urban School of San Francisco and a member of the Jamestown Community Center Council and has also served on the board of the San Francisco Friends School. She and her partner Doug live in San Francisco with their dog and two nearly-grown children. She holds a law degree from Columbia Law School and a B.A. in English from Brown University. 


Suzy has spent over 20 years working in the healthcare industry and would love to see a world in which food is the first line of defense when it comes to taking care of our health and wellness.  She currently leads a Digital Innovation team at Myovant, a biopharmaceutical company, and has spent her career designing and launching new healthcare solutions.  Suzy has a BA in Psychology from Harvard and an MBA from UC Berkeley Haas.  She lives in San Francisco with her husband and experiments in their backyard “farm” with short cycle seed-to-table microgreens, French intensive gardening, and the variety of exotic seeds they’ve been introduced to through 18 Reasons classes.


Poonam Singh comes from a family that has always planned vacations, holidays, and weekends around what to eat next and where. After exploring the world and setting up her home kitchens from Tanzania to New York, she now lives in her hometown of San Francisco, where both the amazing produce and community focus on food equity make her feel lucky every day. A longtime 18 Reasons volunteer, in her day job she works as a corporate lawyer advising on public company governance, M&A, U.S. securities law and corporate finance. She holds a B.A. in Religious Studies and a J.D. from New York University and an M.A. in Religion from King’s College London.


Sarah was born and mostly raised in rural Kansas.  She is a longtime community volunteer and advisor in the Bay Area, focused on helping organizations and people convert good intentions into real actions. Sarah is a Trustee of the College Preparatory School, a member of Full Circle Fund, and a member of the Dean's Advisory Council of the Harvard Radcliffe Institute.  She has recently served as a Board member of La Cocina and as a Trustee of the San Francisco Friends School.  Sarah holds degrees in Soviet Studies from Harvard/Radcliffe Colleges and in International Business from SIPA at Columbia University.  She enjoys travel, food, books, maps, and being outdoors, and lives in San Francisco with her husband and two sons.


Marian has a lifelong love of cooking and baking, and enjoys creating meals that bring people together.  She is a Vice President and shareholder of Dodge & Cox, a San Francisco investment management firm, where she has worked for over 30 years. Marian currently serves on the Board the Bay School of San Francisco and served on the board of The San Francisco School for 11 years, serving as chair of the Finance Committee and Advancement Committee, and as Chair of the Board. Marian has a BA in religion from Dartmouth College. 


Claudia Ossa
Marjorie Freedman
Naomi Starkman
Rachel Pringle
Nínive Calegari
Susan Norris
Hollie Greene
Anna Ghosh
Juri Sanchez
Susanna Poon