Molly Lonborg is a 2009 graduate of California Polytechnic State University, San Luis Obispo, having earned a B.S. degree in Earth Sciences with a concentration in Wine and Viticulture. She has traveled extensively and studied geology at the University of Otago in Dunedin, New Zealand. But it was winemaking that ultimately drew her professional attention.

She worked her first harvest at Baileyana, which is in the Edna Valley near San Luis Obispo, and furthered her cellar experience with a stint with Justin Winery in Paso Robles. From there, Molly moved on to Halter Ranch in mid-2011, starting as lab manager and cellar assistant. She quickly moved up the ranks, from enologist, to assistant winemaker, and then in early 2018, to associate winemaker.

In February 2020, Molly was named winemaker of the month by Wine Business Monthly, and in March, she became the winemaker at Alta Colina in Paso Robles. She succeeds Bob Tillman, the founder of the winery, in this role. The winery is noted for its Rhône varietals, including Marsanne, Roussanne, Viognier, Syrah, and Petite Sirah.

Molly lives in Paso Robles with Jordan Lonborg, her husband, who is the viticulturalist at Tablas Creek Vineyard, her two children, and the family dog, Miles Davis. She enjoys gardening, hiking, traveling, and live music.