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Our Winemaking Team

David Yorgensen,
Consulting Winemaker

David believes winemaking is about the details. David has been with us since 2004, after launching his winemaking career with Seavey Vineyard, with consulting winemaker Philippe Melka.

David has also assisted in the cellars of Grace Family Vineyard in St. Helena. David also makes his own wine as Kind Cellars using sourced fruit; he was recently awarded a 99 point score from Robert Parker Jr.

Mark Davis,
Winemaker

Mark brings us the most advanced winemaking practices, as a graduate of UC Davis with Bachelors Degrees in both Viticulture and Enology, where he received the department citation for outstanding achievement. From there, Mark worked several harvests throughout northern California, as well as harvests in Australia and the famous Stellenbosch growing region of South Africa. This diversity of harvests provided exposure to a broad range of winemaking techniques, which Mark now includes in his own winemaking process.

In addition to overseeing the day-to-day winemaking at O’Brien Estate, Mark makes his own wines under the Cobden Wini label, specializing in Pinot Noir.

Tyler Kirby,
Assistant Winemaker

Tyler pours his innate creativity and self-expression into the wines he creates, marrying an extraordinary understanding of winemaking science and principles. From his start in 2012 at Domaine Chandon to his rise to Assistant Winemaker at Markham Vineyard, Tyler achieved a depth of knowledge and experience producing exquisite Napa Valley wines. He is a graduate of UC Davis with Bachelors’ degrees in Viticulture & Enology, and Economics, with a deep appreciation for Napa’s unique regions and sense of place.

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