- American Wine Society, 2007-Present
- American Society for Enology and Viticulture, 1970-Present
- American Society for Enology and Viticulture, Eastern Section, 1982-2007
- Sonoma County Vintners Co-operative, 1986-1990 (President 88-89)
- Sonoma County Wine Library, 1986-1990 (Director 89-90)
- Napa Valley Wine Technical Group, 1970-1982 (Secretary 74-75)
