Chief, Sec Implementation and Assistant Section, Aviation Sec Branch, International Civil Aviation Organization since 1991. Aviation Sec Officer, Office of Civil Aviation Sec, Federal Aviation Administration, United States of America, since 1972. Senior Aviation Sec Official, AVSEC Branch, Tech Cooperation Bureau, International Civil Aviation Organization, Montreal, Bangkok, 1987-1991.
Chief Investigator, Industrial Sec Department, General Dynamics Corporation(s), United States of America, 1965-1972. Special Agent, Federal Bureau of Investigation, United States Department of Justice, 6065. Special Agent, Office of Special Investigations, United States Air Force, 1952-1960.