 Having served as a college president in South Vietnam before the fall of Saigon in 1975, he spent time in a re-education camp until escaping in a small boat.He taught entomology at the University of Florida for the remainder of his career, guiding the international Cuong Nhu martial arts community at the same time.From 1961 to 1971 he was a professor in the Department of Biology of Hue University, South Vietnam, during which time he founded the Cuong Nhu style of martial arts.