[1] He was the Australian Representative on the Executive Board of UNESCO from 1999 to 2005[2] and a member of the Commonwealth Grants Commission.
[1] He has published a significant number of books, monographs, and articles in Australasia, Europe and North America.
Wiltshire has served as consultant to parliaments, governments, Royal Commissions and Inquiries, private business groups, and international bodies.
He has served as Chairman of the Australian National Commission for UNESCO, Australian Heritage Commission,[4] the World Heritage Wet Tropics Management Authority, Review of the Queensland School Curriculum, and Tertiary Entrance Procedures Authority, and recently[when?]
[5] In 2010, following the federal election, Wiltshire wrote an opinion piece for The Australian newspaper where he quoted Edmund Burke.