 He represented the Uniting Church at the Fifth World Conference on Faith and Order of the World Council of Churches at Santiago de Compostela, Spain in 1993, and was an official guest at the Ninth Assembly of the World Council of Churches meeting in Porto Alegre, Brazil, in 2006.From 2002 to 2014 he was a member of the International Joint Commission for Dialogue between the World Methodist Council and the Roman Catholic Church (MERCIC).From 2004 to 2010 he was a member of the Network of Theologians of the World Alliance of Reformed Churches (WARC), and from 2009 to 2019 was a member of the editorial advisory board of "Reformed World" of the World Communion of Reformed Churches (WCRC).