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.