At Line 39, our winemakers travel across California’s vast wine regions to nurture grower relationships and secure the best available fruit sources. This unending commitment to quality provides the foundation for blending stylistic wines that are sophisticated, approachable, consistent and always enoyable. Our ultimate goal is to show wine consumers that good wine does not always come with a hefty price tag.


Mark Rasmussen has made wine at some of California’s leading wineries for over 35 years. In addition to overseeing the Line 39 program, Mark serves as SVP of Winemaking for parent winery O’Neill Vintners & Distillers. Prior to O’Neill, Mark spent 12 years with Golden State Vintners where he was involved in winemaking and production across multiple wine regions and brands. Mark began his winemaking career in 1977 with Pacific Land and Viticulture and later moved to Sebastiani in 1982, where he became Director of Winemaking. In 1986 Mark started his own company, Global Vin and Beverage, where he was instrumental in the launch of both the Vinterra and Viansa wine brands. He holds an undergraduate degree from UC Berkeley and a graduate degree in Food Science/Enology from Fresno State University.

Steven Decosta leads a team of talented young winemakers who focus on creating wines with character that come from premier appellations and fruit. Working to ensure the highest level of winemaking standards are met, he also oversees research and development and introduces new technology that’s implemented across the winery. Steven uses his foundation of chemistry and microbiology to create wines with a varietal focus of aromatics and flavors that consumers will enjoy. He earned his Bachelor of Science degree in Enology from California State Fresno. When Steven is not in the vineyard or production facility, you can find him traveling, cooking or reading philosophy.