During the 1908 Ottoman Constitutional Revolution, he participated in the development of plans for reforms for Ottoman Armenians and used the archives of the Armenian Patriarchate of Constantinople to develop a census of the number of Armenians living in Western Armenia. After 1908, Zavarian traveled to Mush and Sassoun as a teacher and inspector-general of Armenian schools. He settled in Constantinople in 1911, where he taught at the Yessayan School and worked on the ARF newspaper "Azadamard".