David is an independent researcher, writer, and filmmaker, specializing in Arctic parks, mammals, and history, especially the Canadian Arctic Expedition (CAE) of 1913-1918.
During his research on the behaviour of muskoxen, David spent several years, including one winter, on Bathurst Island, Nunavut. As a researcher with the Canadian Museum of Nature, he made annual trips north to study muskoxen, Arctic hares and Red-throated Loons.
As a filmmaker, he directed Arctic Shadows: the Arctic Journeys of Dr. R. M. Anderson and five documentary films on early immigration from India to Canada. David has written two books on Arctic subjects: muskoxen and CFS Alert, and produced two Virtual Museum of Canada exhibitions, Ukaliq: the Arctic Hare and Northern People: Northern Knowledge. He also produced an exhibition on the CAE for the Canadian Museum of Civilization. In 2013 David headed a research expedition to Banks Island to document sites used by the CAE.