His interest in environmental issues has led him to work on several major educational and interpretive design projects including the Bird Studies Canada Headquarters at Long Point, Ontario, the award-winning Ashbridges Bay Treatment Plant Site Design Project, a series of ecotourism/educational facilities in Latin America including the Rainforest Discovery Centre adjacent to the Panama Canal, a world heritage tourism project in lowland China, the Canadian Museum of Inuit Art in Toronto and the Tropical Forest Science Center and the Tupper Campus Site Design for the Smithsonian Institution in Panama. David is currently working on a renovation to the Canadian Museum of Immigration at Pier 21 in Halifax.