I have worked in heritage conservation for over twenty years, mainly in Eastern Canada and New York State. My experience is chiefly in masonry conservation, and copper/slate roofing, but I also work in related fields such as conservation of wood, wood windows, and cast-iron railings. For masonry conservation, I have worked with all types of stone, brick and terracotta. I have worked closely with the Heritage Conservation Directorate of Public Works over the past fifteen years, and sit on the Mortars Working Group chaired by the NRC. I also sit on the committee for CSA A179, and on the Heritage Mortar Sub- Committee.