Bio

With over 10 years of experience in municipal, provincial, and federal politics, John Sinclair brings deep expertise in government relations, strategic communications, and political operations to help clients navigate complex public policy environments.

John has held senior roles at all levels of government, including serving as Deputy Chief of Staff to the Leader of the Official Opposition at Queen’s Park and later as Executive Director of the Progressive Conservative Caucus under Premier Doug Ford. At Toronto City Hall, he served as Chief of Staff to Councillor Jennifer McKelvie during her tenure as Chair of the Infrastructure and Environment Committee. Most recently, John held the role of Deputy Chief of Staff to the Leader of the Conservative Party of Canada, Pierre Poilievre.

Bringing a decade of frontline political experience, John has been at the centre of decision-making in both opposition and government, with a strong track record in issues management, stakeholder engagement, and policy development.

John is proud to support Crestview Strategy clients through insight, strategy, and a commitment to delivering results.