Premasagar first taught at the Andhra Union Theological College (AUTC), Dornakal between 1961-1964 and his other colleagues included Eric J. Lott and later he left for specialized studies to England. By this time, the AUTC together with the Lutheran Theological College, Rajahmundry and the Baptist Theological Seminary, Kakinada formed the Andhra Christian Theological College in 1964. By the time Premasagar returned from his studies in 1966, he was reassigned to teach at the new entity in the river town of Rajahmundry.