He was the founder and editor of one of the first theological journals on Buddhist-Christian encounter called Dialogue (1961–1981), chief translator for the revision of the Old Testament of the Sinhalese Bible published as New Sinhala Bible (1973–1982), and director of the Ecumenical Institute for Study and Dialogue (EISD) in Sri Lanka (1962–1982).
Ia merupakan pendiri dan penyunting salah satu jurnal teologi petama mengenai perbandingan Buddha-Kristen yang berjudul Dialogue (1961–1981), ketua penerjemah revisi Alkitab Perjanjian Lama Sinhala yang diterbitkan dengan nama New Sinhala Bible (1973–1982), dan direktur Ecumenical Institute for Study and Dialogue (EISD) di Sri Lanka (1962–1982).