David Eugene Heineman (born May 12, 1948) is an American politician who served as the 39th governor of Nebraska from 2005 to 2015. A member of the Republican Party, he previously was the 39th treasurer of Nebraska from 1995 to 2001 and 37th lieutenant governor of Nebraska from 2001 to 2005. Having served out the remainder of Johanns' term and winning full four-year terms in 2006 and 2010, Heineman is the longest-serving Nebraska Governor with just under 10 years of service.