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Our Team



Alice and David Alkosser


After growing and selling their ultra premium hillside grapes to several prestigious wineries, proprietors Alice and David Alkosser established their own wine brand in 2010 and called it Shadybrook Estate.   Located in the cooler climate of Coombsville, their vineyard perfectly lends itself to growing the 5 Bordeaux varietals, resulting in amazing Bordeaux style wines. By highlighting the terrior, their winemaker Rudy Zuidema, utilizes the flavor intense fruit to hand craft wines of superlative quality. 

Having decided to find a home where they could control the entire process from the vineyard to the bottle, the Alkossers purchased the historic Rapp Ranch property in the heart of Coombsville.  They realized that together with the Shadybrook team, they could make this  hidden gem their own. 


Rudy Zuidema


Rudy’s passion and focus on making wine for premium estate programs has never been more evident than in his role with Shadybrook Estate.  In the vineyard, he follows organic and biodynamic farming practices that naturally enhance the flavor diversity demonstrated by the vineyard’s rich tapestry of individual blocks.  Rudy’s natural approach continues in the winery where he emphasizes classic, small-lot techniques and gentle handling to craft balanced wines that embody a sense of place with elegance, purity and power.

Having almost 30 years of winemaking experience in the Napa Valley, Rudy has worked with some of the most esteemed vineyards and wineries.  While looking for someone to evaluate their new estate vineyards by vinifying small lots from the 2010 harvest, Alice and David Alkosser invited Rudy to participate in their new venture. Upon viewing the vineyards and sampling the grapes, Rudy agreed without hesitation to be the winemaker for Shadybrook Estate. 

Michael Andrews

Associate Winemaker

Having previously worked with winemaker Rudy Zuidema, and having created a long standing friendship with mutual admiration for one another’s expertise, Rudy called Michael with “an offer he could not refuse”.  As Associate Winemaker of Shadybrook Estate Winery at Rapp Ranch, Michael brings with him a rich background in vineyard management, quality control and mastery of the cellar. He is instrumental in overseeing the daily operations and involved with everything essential to maintaining the highest quality wines. 

Marketing & Hospitality

Kimberly Bothwell

Director of Hospitality & Marketing

After gaining experience in a variety of hospitality management positions, Kimberley accepted the Wine Club and Allocations Manager position at Shadybrook Estate winery.  She brings with her comprehensive knowledge of the wine business, customer service and brand development.  Her care and consideration for our members is deeply admired by all. 

Vineyard Farming

Tom Prentice


As Shadybrook Estate’s viticulturist, Tom Prentice brings with him more than 40 years experience as an advisor in the overall management of the vines.  His technical services of agricultural land spans over 100,000 acres and countless crops throughout the US and abroad.  However, Tom’s true love is in the vineyard and his expertise has proven indispensable in all stages of the Shadybrook Estate’s vineyard care and planting programs. 

Mario Bazan

Vineyard Manager

Beginning in the early 1970’s Mario has farmed thousands of acres for some of the most prestigious wineries in Napa Valley.  Mario has consistently demonstrated a committed effort and expertise in his crucial role of ensuring that the best sustainable practices are followed for the proper care of the vineyard.  He has been associated with the Shadybrook Estate vineyard for over 20 years and has a special knowledge of our hillside Coombsville fruit.