A former Research Scientist at the National Water Research Institute (Canada) from 1987 until his retirement in 2004. Prior to that he worked for 10 years with Alberta Environment, and for three years with the International Joint Commission. He is now a senior scientist at GHOST Environmental Consulting, an adjunct professor at Acadia University in Nova Scotia, and a Professorial Fellow at the University of Canberra. His research has been directed at developing improved techniques for using benthic invertebrate assemblages in aquatic ecosystem health assessment, and the Reference Condition Approach, that he formalised as the basis of a national biomonitoring network for Canada. He has over 150 publications and reports, with more than 90 in the primary literature. Dr Reynoldson’s expertise lies in the application of multivariate statistical methods to analysis of invertebrate community structure data, and to linking effects at the community level to both organism and smaller biological scales. He has also worked in developing numeric biological criteria for both invertebrate communities and for laboratory tests with invertebrate species.