[1] On completion of his Ph.D. at Queens University, Leach was appointed as an assistant professor at HEC Montreal, a post he held for three years.
[1] The Economist cited Leach's statistics in its January 1, 2011 article "Muck and brass: Canada's tar sands", which compared statements from a number of environmentalists, academics, and oil industry players, including the Canadian Association of Petroleum Producers (CAPP).
"[9] The NDP Alberta provincial government recruited "Leach to help steer the province’s new climate change strategy" in 2015.
[9] Leach calls for a "level playing field that discourages more emissions, no matter where they come from" but does not "demonize" the oil sands.
[9] Leach says that a "credible emissions reduction plan" that includes all the elements of Alberta's "new fiscal regime, from taxes to royalties to carbon levies" for the oil sands is necessary in order to "secure new markets" and major investments for "big players' in Alberta's oil industry.
[10] Leach co-authored an October 4, 2019 Chatelaine article with the United Nations Intergovernmental Panel on Climate Change (IPCC) scientist Katherine Hayhoe, comparing the four federal parties.
[15] Leach reviews articles posted on line by the "pro-energy corporation", the Calgary-based Canadian Energy Centre, which is funded by the government of Alberta.