Early years and political rise
Tiemann visited until 1949, the University of Nebraska. He had his education but in the meantime interrupt, because he served as a soldier in the U.S. Army in the Pacific during World War II. Between 1950 and 1952 he worked for the American government in occupied Korea. Tiemann was elected three times for mayor of Wausa in Knox County before he was nominated by the Republican Party as a candidate for the forthcoming gubernatorial election in 1966. In this he sat down significantly with 62:38 percent of the vote against Democratic Lieutenant Governor Philip C. Sorensen by.
Governor of Nebraska
Tiemann took up his new post on January 5, 1967. He was the first governor of Nebraska, who was able to complete a four-year term without re-election. In 1962, the Constitution of the State had been amended accordingly. During his reign there was a further tax reform. Thus, the education budget could be better funded. Under Tiemann also the Ministry of Economic Development was launched. In addition, health care has been improved. The mentally disabled were better supplied. The voting age was lowered to 19 years. In 1967, the 100 - year anniversary of the accession to the United States was celebrated in Nebraska. In total, more new laws were enacted in Tiemann's tenure than ever before in the history of Nebraska.
Between 1973 and 1977 Tiemann was head of the Federal Highway Administration, a sub- agency of the U.S. Department of Transportation. After that he went into retirement. He was married and the father of four children.