Founder of Mathiasson

Jill Klein Matthiasson is the driving force behind the business operations of the Matthiasson family’s farming and wine projects, guided by her belief that the intersection of nature and culture is the heart of the wine and food world. She studied botany at Penn, researched ancient farming techniques in Israel, and earned her Masters degree in agriculture and soil health at UC Davis. In the early 1990s, Jill pioneered farmer to farmer sustainability networking and helped advance the local food movement through programs focused on direct to consumer farming. As she and her husband Steve launched Matthiasson, Jill built the brand’s sales and marketing strategy while managing operations and administration. Today, she oversees sales and brand strategy for Matthiasson while also farming Napa Valley vineyards and heirloom fruit orchards alongside Steve.

Steve Matthiasson is a Napa Valley based winemaker, viticulturalist, and organic farmer known for crafting balanced wines that reflect their place of origin with honesty and precision. His work under the Matthiasson label has earned widespread acclaim, including Winemaker of the Year honors from both Food & Wine and the San Francisco Chronicle, along with six James Beard Award nominations for Outstanding Wine, Spirits, or Beer Professional. Since 1996, Steve has consulted for renowned Napa Valley vineyards including Stag’s Leap Wine Cellars, Spottswoode Winery, Araujo Estate, and Dalla Valle Vineyards. He teaches organic viticulture at UC Davis, speaks internationally on regenerative organic agriculture, and helped author several influential sustainability programs for California winegrowing. Together with his wife Jill, Steve farms family vineyards and heirloom fruit orchards in Napa Valley.