Mr David Usher was the Canadian ambassador to the Federal Democratic Republic of Ethiopia, with concurrent accreditation to the Republic of Djibouti, and Permanent Observer of Canada to the African Union. He worked in the field of development in Nigeria, Malawi, Haiti and the Philippines in the non-governmental sector. In 1991, he joined External Affairs and International Trade Canada. From 1994 to 1997, he served as second secretary in the Canadian embassy to Turkey. In 2001, he became

In 2001, he became counsellor at the Permanent Mission of Canada to the World Trade Organization in Geneva. From 2004 to 2005, he was director of the Trade Controls Policy Division and, later, director of the Softwood Lumber Controls Division. From 2008 to 2009, he was senior departmental adviser in the Office of the Minister of International Trade. Most recently, since 2009, he served as minister-counsellor and deputy permanent representative at Canada’s Permanent Mission to the Organisation for Economic Co-operation and Development in Paris.

Mr Usher holds BA Honours [History] from Carleton University, 1979; BEd, University of Ottawa, 1980; MEd, Ontario Institute for Studies in Education, 1986.