Dennis is the owner of Double A Vineyards Inc. The nursery was established in 1990 and has grown to be one of the largest suppliers of grapevine planting stock in the United States. Dennis is a graduate of Cornell University (1980) with a BS degree in horticulture and plant protection. He has worked in several areas of grape production including vineyard manager, farm supply sales and nursery production. In addition to grapevine production Dennis grows 300 acres of grapes, other nursery crops and has been involved in the development of Hybrid Shrub Willow as a dedicated energy crop.