John Crump served in the U.S. Army from 1950-1954, including 30 months in Germany as a counterintelligence agent. He entered the U.S. Foreign Service in 1957, and during his 25-year career served in New Zealand, Germany, the Netherlands, Belgium, England and Israel. He also worked with the Department of State in Washington, D.C. and served two years as an instructor at the Air Force Academy in Colorado Springs.
Crump obtained an undergraduate degree from Kansas State University and a masterís degree from the George Washington University in 1962.
After retiring from the Foreign Service, Crump returned to his home town of Lakin, Kansas, where he is active in local community affairs.