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