Aaron previously served as a Senior Advisor to the Premier of Ontario, advising on Environment, Attorney General, Labour, Community Safety and Correctional Services, Natural Resources, Aboriginal Affairs, Agriculture and Rural Affairs, Municipal Affairs, and Northern Development, Mines and Forests.

In addition to his hands-on understanding of the machinery of government, Aaron is one of Canada’s foremost legal experts on public governance. Between 2004 and 2009, he was a faculty member at the University of Ottawa’s Faculty of Law, where he taught public governance law. He is the co-author of The Laws of Government: The Legal Foundations of Canadian Democracy (2nd ed., 2010), the most comprehensive legal reference book on the law of Canadian democracy. The Ontario Bar Association lists The Laws of Government as one of “The Top 15 Books Every Lawyer Should Read.”

Aaron has been named by The Hill Times as one of the Top 100 Federal Lobbyists in Canada. He has played a key role in several national advocacy campaigns, and has worked closely with parliamentarians and public servants on countless regulatory and legislative initiatives.

Aaron is the Founder and Past President of GreenPAC, Canada’s organization to build environmental leadership in politics. He established Canada’s Parliamentary Internship Program for the Environment, as well as the “100 Debates for the Environment” initiative in the 2019 Federal Election.

For nearly a decade, he was a regular columnist with the Hill Times, Canada’s parliamentary newspaper. His commentaries have also been published in most major daily newspapers in Canada. 

Aaron is a recipient of Canada’s Clean50 Award, which recognizes his work to promote environmental leadership in government decision-making.

He is a graduate of McGill University and the University of Ottawa’s Faculty of Law, where he was awarded the Gowling Lafleur Henderson Prize for International Trade Law.