 He taught Armenian studies courses at the Nshan Palanjian Jemaran and held important positions in the ARF.From 1968 until his election to the ARF Bureau (1972), Sarkis Zeitlian was first a member and then chairman of the ARF Central Committee of Lebanon.Sarkis Zeitlian became the editor of the ARF Bureau organ Aztag Shapatoriag-Troshag in 1969.