Sebastiani served in the
California State Assembly as a
Republican from the
8th district from 1980 until 1986. In 1986, he launched an unsuccessful bid for
California State Controller. In 1986 and 1987, He served as a member of the Advisory Committee for Trade Negotiations in the
Reagan Administration. Sebastiani soon returned to Sonoma to run his family's wine business,
Sebastiani Vineyards, where he took production from little more than 200,000 cases to nearly eight million in 15 years. Also, in 1986, along with brother-in-law Roy Cecchetti, Sebastiani began a
negociant-style winery, Cecchetti Sebastiani Cellar (CSC). CSC developed the label Pepperwood Grove and the two grew their business to nearly 400,000 cases by 1999. In the spring of 2001, Sebastiani left the company and, along with his sons Donny and August, started Don Sebastiani & Sons, which developed Smoking Loon and Plungerhead. == Personal life ==