Grace Hafner, youngest of the four Hafner grandchildren, is Alexander Valley born. A 2013 graduate of Tufts University, she worked in San Francisco at Dropbox and Restoration Hardware, then moved to Bordeaux in 2017 where she earned a Masters in Vineyard and Winery Management from Bordeaux Sciences Agro. Following internships at Château les Carmes Haut-Brion in Bordeaux and Château Marquis de Terme in Margaux, she worked for five years at Domaine de la Solitude and Château Lespault-Martillac in Martillac where she was the Maître de Chai. Grace joined the Hafner Vineyard team full-time in 2025 where she is part of the winemaking team.