Mumm Napa Winery | 839 followers on LinkedIn. Today, Champagne-born master winemaker Ludovic Dervin leads the way, using his international experience to craft balanced, distinctive wines in the acclaimed méthode traditionelle. Continuing the long tradition of handcrafted wine, each cluster of grapes is carefully selected and transported in small baskets. The harvest is then gently pressed using only the first, most pure, pressing to go into our sparkling wines.