At BIO he undertook research on the physical oceanography of coastal and shelf seas as well as investigating environmental effects on fish stocks. For 20 years he provided environmental reviews of the Northwest Atlantic for the North Atlantic Fisheries Organization (NAFO) and later for fisheries assessment groups in eastern Canada.
In 2003 he moved to the Institute of Marine Research in Bergen, Norway, where he is continuing his investigations into the effects of climate variability and change on marine ecosystems. He leads or is involved in several ESSAS related projects funded by the Norwegian Research Council including NESSAS, NORCAN, MENU and MENUII. He also heads the ESSAS lead IPY consortium Ecosystem Studies of Subarctic and Arctic Regions (ESSAR) and oversees the daily operations of the ESSAS Project Office located in Bergen.