Bernon F. Mitchell

https://en.wikipedia.org/wiki/Martin_and_Mitchell_defection

Bernon F. Mitchell (March 11, 1929 – November 12, 2001) was born and raised in Eureka, California, and enlisted in the US Navy after one year of college. He gained experience as a cryptologist during a tour of duty in the Navy from 1951 to 1954, serving in Japan with the Naval Security Group at Kami Seya. He stayed on in Japan for another year, working for the Army Security Agency. Following his Navy service, in 1957 he earned a bachelor's degree in Statistics at Stanford University.

Martin and Mitchell became friends during their Navy service at the Naval communications intercept facility at Kami Seya, Japan. They kept in touch as each returned to school after their Navy service and encountered one another again when each was recruited into the National Security Agency (NSA) in 1957.

Their years at the NSA were uneventful. Martin gained enough recognition that he was twice awarded scholarships for study toward a master's degree.