"Circa" 1949, Meyer started working for the Central Intelligence Agency, joining the organization in 1951 at the invitation of Allen Dulles. At first he worked at the Office of Policy Coordination under former OSS man, Frank Wisner. In 1953, Meyer came under attack by the Federal Bureau of Investigation (FBI), which claimed he was a security risk for having once stood at the same podium of a "notorious leftist", and refused to give him a security clearance. An internal CIA inquiry summarily dismissed the claims.