After graduating from high school, Dorfmann studied agricultural sciences in Piacenza and he started teaching in the agricultural school of Auer. He then became the head of the department for agriculture in the chamber of commerce in Bolzano. After that Dorfmann became the director of the South Tyrolean farmers' association, a position he occupied for nearly ten years. Dorfmann is married and father of two sons.
Political career
From 2005 to 2009, Dorfmann served as mayor of Feldthurns. He is also the chairman of the South Tyrolean People's Party in the Eisacktal district and therefore a member of both the party's leadership and its executive committee.