Secretaries-General
Dr. Ninnat Olanvoravuth
Term of Office: 1981-Present
Dr. Prachoom Chomchai
Term of Office: 1968-1980
Prof. H.H. Prince Prem Purachatra
Term of Office: 1961-1967
Prof. Kasem Udyanin
Term of Office: 1958-1960
Term of Office: 1981-Present
Term of Office: 1968-1980
Term of Office: 1961-1967
Term of Office: 1958-1960