Bachelor of Science in Mechanical Engineering, Purdue University, 1948.
Commissioned ensign United States Army, 1944, advance through grades to captain, 1950. Regional manager H. L. Yoh Company, Cincinnati, 1959-1965. Chief engineer Allstates Design & Development Company, Cin, 1965-1971.
Sole proprietorship H.J. Tyrrell Company, Manchester, Missouri, 1971-1975. President owner H.J. Tyrrell Company, Inc., since 1975.
Member Parent Teacher Association Woodly Hills School, Fairfax 1945-1956, founder & president Fox Ridge Civic Association, Loveland 1958-1967. Captain Army Engineers, 1944-1947. Member National Technology Services Association (treasurer, secretary, vice president since 1974), F & A Masons, Schriner.
Married Jean Eleanor Harter, May 18, 1944. Children: Connie Jean Kinman, Douglas Hubert.