Stephen de Boer joins Wellington Advocacy following a distinguished career in the Government of Canada, with senior roles across Canada’s trade, foreign policy and climate policy agendas.

Most recently, Mr. de Boer served as Deputy Minister and Foreign and Defence Policy Advisor to the Prime Minister from 2023 to 2025.

Previously, Mr. de Boer served for five years as Canada’s Ambassador and Permanent Representative to the World Trade Organization, representing Canada in global trade negotiations and dispute settlement.

From 2015 to 2016, he represented Canada as Ambassador to Poland and Ambassador to Belarus. Earlier in his public service career, Mr. de Boer held senior roles across Global Affairs Canada and Environment and Climate Change Canada, including Assistant Deputy Minister of Environment and Climate Change Canada’s International Affairs Branch.

He also served as Director General of the Trade Controls Bureau; Director of the Oceans and Environmental Law Division; Lead Counsel for Canada’s international climate change negotiations; Deputy Chief Negotiator for climate change; and Director General responsible for Canada’s international climate change partnerships.