Mark Jessup is third generation born and raised in Napa Valley. He started his winemaking career 41 years ago at Inglenook Winery. It was there he decided that winemaking would be his life career. He went on to work with the cellar team at Robert Mondavi and Opus One. In 1996, Mark launched his first winery, Jessup Cellars in Yountville, California. Mark enjoyed this until 2005 when he decided to “slow his soul down” and sold Jessup Cellars to launch J Gregory Cellars. J Gregory, a 2000 case production, is named after Mark’s third son, Jonathan Gregory Jessup.