Born on a farm near
Sheffield, Iowa, to
German immigrants, Schwengel attended the rural schools in West Fork Township and high schools in
Chapin and Sheffield. He graduated from
Northeast Missouri Teachers College at
Kirksville, Missouri, in 1930 where he was an undergraduate member of
Phi Sigma Epsilon fraternity, and attended graduate school at the
University of Iowa in
Iowa City from 1933 to 1935. To this day,
Truman State University displays a collection of Schwengel's personal collection of Abraham Lincoln historical artifacts that were donated by Schwengel's wife, Ethel, after his death in 1993. Schwengel had founded the
United States Capitol Historical Society in 1962, and continued to serve as its president after his defeat, until 1993. Early in his career, he served as national president of
Phi Sigma Epsilon fraternity. He also was a founder and president of the Republican Heritage Foundation. He also served as the President of the Iowa Chamber of Commerce and chairman of the National Civil War Centennial Commission and the Joint Sessions of Congress for the Lincoln Sesquicentennial. He served in the
Missouri National Guard from 1929 to 1936. He served as athletic coach and instructor of history and political science in public schools of
Shelbina, Missouri, and Kirksville, Missouri, from 1930 to 1937. He engaged in the insurance business in
Davenport, Iowa, from 1937 to 1954. ==State offices==