Sonoma Hills Farm barn sketch illustration

PEOPLE

AARON KEEFER
Vice President of Cannabis Cultivation and Production

While his love of food and obsession with gardening blossomed during his decade at The French Laundry, Aaron Keefer saw his extensive plant knowledge as a stepping stone in a path to cultivate his other favorite flora: cannabis. Every day he witnessed the fruits of his meticulous labor delivered to the most discerning palates in Chef Thomas Keller’s three Michelin star dining room, and he knew that someday he could bring the same passion with quality and care and apply it to growing cannabis.

In the restaurant world Keefer built a reputation as one of the most respected gardeners in the industry. As Culinary Gardener for some of the finest restaurants in the world, Aaron collaborated with celebrated Chef Thomas Keller and his culinary teams at several Keller establishments to harvest and supply the highest quality produce in the industry. It was under the Thomas Keller Group that Aaron fully realized the true potential of ingredient sourcing and how the foundation of a great kitchen is built upon the walls of the garden.

Aaron’s green thumb and passion for the land emerged at a young age. His earliest memories include picking sun-warmed strawberries from his grandfather’s farm in upstate New York at age where he practiced sustainable farming methods and learned to listen to the rhythms of nature. From hand picking fields of berries to tossing hay bales during the summers as a teen, the agriculture life always resonated with Keefer. However, it was the smell of his grandmother’s cooking his recently harvested onions and beans that fully made him realize the full sensory experience that gardening could deliver.

Upon graduating from the Culinary Institute of America, Aaron moved to California and began his restaurant career at the Marin Country Club, where he rose quickly to the roles of Executive Chef and Food and Beverage Director. Through the past years, he has also legally cultivated medicinal cannabis. It was after he sought a career defining opportunity and began his tenure at The French Laundry that Keefer began to recognize his opportunity to grow professionally. Chef Keller’s insistence upon ingredient quality led Keefer to train in the culinary garden, where he rekindled his childhood love with cultivation, and provided him an opportunity to reconnect with botany on a professional level.

Already a passionate cannabis connoisseur and advocate, Aaron had fallen in love with one plant, but in the gardens of Yountville he became obsessed with learning about them all. From the life of soil to pest management, microbial and fungal elements to the weather, he understands that gardening does not exist in a vacuum. The finest ingredients are produced in harmony with nature and the elements that it brings. Just as a highly tended garden produces the best crops, and a well managed vineyard is crucial to crafting a fine wine, the best cannabis is reliant upon the people and philosophies that nurture it from seed to shelf.

As a professional chef, Aaron has been driven by the validation that comes from creating a product he can be proud of. With respect to any plant, and especially cannabis, Aaron takes a three part philosophy. First: the correct genetics are crucial and are the building blocks of the plant. Strains must be sourced that are going to deliver the desired results. Second: to realize a plant’s potential the soil, conditions and nutrients too must be properly maintained. And last: it’s all about the harvest. Keefer maintains that when, how and what is done to the crop after harvest is just as critical as everything that leads up to that point. As a passionate professional chef and gardener Aaron knows there’s no substitute for quality and sums up his own personal philosophy by stating simply, “Anything I produce is something I’d want to enjoy myself. No shortcuts.”

Here at Sonoma Hills Farm we are proud to abide by this philosophy as well.

Executive and Founder Team

Mike Harden, Founder, Chief Executive Officer

Mike Harden is an experienced venture capitalist and entrepreneur with more than 20 years in the investment industry. He is founder and CEO at Big Rock Partners, a San Francisco based investment firm and family office dedicated to serving the cannabis, hospitality and wellness communities in California and beyond. Prior to Big Rock, Mike was a founder and partner at ARTIS Ventures, a San Francisco-based venture capital firm, and helped lead investments in Palantir, Modern Meadow, YouTube, Astra, ChefsFeed, Practice Fusion and others. Mike has served on numerous boards from hospitality and cannabis to tech and biotech and has spoken at major financial conferences such as the Milken Institute Global Conference and New West Summit.

He holds a BA from Washington & Lee University and an MS from the FW Olin School of Business at Babson College.

Shauna Harden, Founder, Executive Producer

Shauna Harden is a cannabis advocate and creative producer who has spent a decade working to support and elevate intentional, values-driven work in the cannabis and hospitality spaces. She served as executive producer on the award-winning documentary Lady Buds, a documentary that follows six women in California’s cannabis industry as they navigate the challenges of legalization, corporate competition, and the evolving marketplace post-Prop 64. It highlights their resilience, entrepreneurial spirit, and deep-rooted connection to the plant, shedding light on the struggles of small farmers and legacy operators in a rapidly changing industry. The film received multiple honors, including a CLIO Award for its trailer—something Shauna credits to a strong team and a shared belief in the importance of the subject matter.

As a founding team member at Sonoma Hills Farm, she’s helped lead experiential marketing efforts that connect cannabis with culture, craftsmanship, and community. She’s overseen collaborations with partners like 19-69, helping to shape a brand presence that is both elevated and deeply rooted. More than anything, she’s proud to be part of a team that cares deeply about the plant, the land, and the people it serves.

Joyce Cenali, Chief Operating Officer

Joyce Cenali is an accomplished sales, operations, and business development executive, with extensive experience in the cannabis industry. She began cultivating for personal use in her home garden in 2004, and later co-founded a cultivation project in the Sierra region. In 2016, her group won an Emerald Cup in the Dry Sieve category. She started personally investing prior to joining forces with Big Rock Partners, served as Fundraising Chair for Women Grow Sonoma, and has presented at industry events such as SXSW, CWCB, BevNetLive, SheCann, New West Summit, and more.

She previously founded a boutique artist management firm, and led business development, licensing and partner integrations for e-commerce start-ups. She recently co-founded the Cannabis Media Council, a trade organization dedicated to using the power of mainstream media to uplift wholehearted, people-centered advertising campaigns that show positive experiences with cannabis in order to normalize and destigmatize across generations. A leading LGBT businesswoman, she was recognized by San Francisco Business Times as a Most Influential Woman in Bay Area Business for 2020. She holds a BA from Smith College.

Sam Magruder, Cultivation & Development Lead

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