A natural leader of great personal presence and magnitude, in addition to her national activities Fetaui Mata'afa was also active in regional and international organisations. In 1970 she was appointed the first Pro-Chancellor of the University of the South Pacific holding this post until 1976. She was a Member of the Commission on World Mission and Evangelism of the World Council of Churches and served as Chairperson of the Pacific Conference of Churches from 1971 to 1976. She was President of the Pacific Fellowship of Girls' Brigade from 1974 to 1983, and International Secretary of the Pan Pacific and South East Asia Women's Association from 1984 to 1988, becoming a Life member of the Council at Large in 1989. Her activities in North America as a Member of the Nestle Infant Formula Audit Commission (NIFAC) based in Washington D.C., USA. from 1981 to 1991 deserved special recognition for the part she played in children's health and the care of nursing mothers.