Dominic Barton, the former global managing director of McKinsey & Company, says he had no involvement in federal contracts awarded to the firm in recent years.
Prime Minister Justin Trudeau has asked Canada's top public servant to look into the government's procurement process over what he said seemed to be a "highly illogical and inefficient" contract to develop the ArriveCan app.
Conservative party leader Pierre Poilievre is calling for a parliamentary inquiry into federal contracts awarded to consulting firm McKinsey & Company.
A report by McKinsey, one of the world's most influential consulting firms, estimates that $9.2 trillion will need to be invested every year for decades to limit the global temperature rise to 1.5 C and end the climate emergency.