Tom has been involved in cold climate viticulture in Minnesota since 1980. He is best known for co-authoring (with Bob Parke) the book Northern Winework: Growing Grapes and Making Wine in Cold Climates. Since 1996, Tom also has pursued his own grape breeding program, focusing on new grape varieties for red wine. T.P. 2-1-24 was named ‘Petite Pearl’ and entered the commercial market in 2010. Two new selections, Crimson Pearl (T. P. 2-1-17)USPP and Verona (TP 1-1-34)USPP were named and introduced into commercial propagation in 2015. Tom continues his breeding work, focusing on issues created by climate change. These include resistance to late winter warm spells and late spring frosts, resistance to splitting and rots during late season bouts of heavy rainfall, and resistance to Japanese Beetles.