He returned to Wisconsin the next year, where he practiced law in Portage. He served several terms as the district attorney for Columbia County. In 1936, he became Lieutenant Governor of Wisconsin, but resigned on October 16, 1937, to accept an appointment to the state tax commission. After GovernorPhilip La Follette left office in 1939, the commission was disbanded, and Gunderson returned to his law practice. He died of a heart attack on October 7, 1940, in Portage, Wisconsin.[4][5]