Dr. Swanton obtained his BSc in Botany from the University of Toronto, His MSc in Agrometerology from the University of Guelph, and a PhD in Plant Ecology from the University of Western Ontario. During the years between earning his MSc and his PhD, he was employed as a field agronomist with the Campbell Soup Company of Canada and later as a weed biologist with the Ontario Ministry of Agriculture and Food. In 1985 he joined the University of Guelph as a faculty member in the Department of Crop Science. In 1996 he was promoted to full professor. From 1998 to 2004, Clarence served as the first Chair of the Department of Plant Agriculture which included the Departments of Crop Science, Horticulture and the Horticulture Research Institute of Ontario. From 2007 to 2008 he served as President of the Canadian Weed Science Society. He has won numerous awards for his research including the Outstanding Canadian in the area of Crop Protection from Bayer CropScience for exceptional contributions to science and innovation. His research is focussed on weed ecology and the development of integrated weed management systems for field and horticultural crops.