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Our Team


Ronene Anderson,
General Manager

A native Californian, Ronene came back to the North Bay in 1997 after working the corporate scene in New York City, London and Santa Fe.  Her first job in wine country was working for a marketing firm that specialized in luxury wine brands (one of them being CONSTANT). 

Ronene gained valuable hands on experience at the first winery she worked for and after 7 years with them was named general manager.  In 2012 Ronene left the winery to branch out as a consultant for other low production, high quality, wineries.  Serendipity called and in almost a full circle, she landed at CONSTANT Diamond Mountain Vineyard®. 

Julie Elkeshen,
Director of Membership

Julie Elkeshen joined the CONSTANT family in 2013 bringing with her over 20 years’ hospitality experience.  She began her career in hospitality management at The Ritz-Carlton Hotel Company and upon returning to the valley she met Freddy and Mary Constant while working at Auberge Resort’s Calistoga Ranch.  Her family have been Calistogans since the mid-1850s and her children are now the 6th generation to live in the Napa Valley.  

Julie strives to make the CONSTANT Diamond Mountain Vineyard® feel like home for our members and believes a visit to the top of the mountain should be an unforgettable experience.   

Jose Calderon,
Director of Vines & Wines

José Antonio Calderon was born in the small town of El Timbinal, Guanajuato, Mexico, where his family raised cattle and farmed corn. He moved to California in 1991 when he was seven-years-old. He grew up in St. Helena, the heart of the Napa Valley. He is a graduate of California State University, where he studied Viticulture and Enology. In 2005 he worked his first vintage at Quintessa Winery in Rutherford, CA. He has since added stints at Fisher Vineyards, Ledson Winery and Vineyards as well as Chambers and Chambers Wine Merchants.

José Antonio began working at CONSTANT prior to the 2013 harvest, and has since used his experience and determination to interpret and elevate the qualities that the Diamond Mountain District has to offer. He believes each wine is an honest portrayal of the distinct characteristics that each vintage brings, whether it be tiny parcels of hand selected single vineyard blocks, or larger more complex blends. He is a “hands-on” winemaker and vineyard manager from vine to bottle. 

Paul Hobbs,
Consulting Wine Maker

As a winemaker, Paul is highly regarded for his ability to identify exceptional vineyards along with his pioneering, innovative work with new and historical sites and regions. His success has inspired a wealth of nicknames among the press, from quiet trendsetter to prospector to truffle-hunting dog. Twice named Wine Personality of the Year by Robert Parker, Jr., he continues to be a leading consultant winemaker around the globe.

Paul Anamosa,
Consulting Viticulturist

Dr. Paul Anamosa is the owner of Vineyard Soil Technologies, a California based viticultural consulting company specializing in soil analysis, land evaluation for winegrape production, and vine nutritional disorders.