David Tilson was first elected as the MP for Dufferin–Caledon in 2004.
In 2006 Tilson was appointed Chair of the Legislative Committee on Bill C2, colloquially known as the Federal Accountability Act. Tilson oversaw 65 hours of debates over the course of a month and a half. The act received royal assent in December of that year.
Before entering federal politics, Tilson was an MPP for the region for over a decade. He served as a councillor for the Town of Orangeville and served as Director of the Association of Municipalities of Ontario. He also served as a Trustee on the Dufferin Board of Education and as chair of the board’s management committee.
Tilson practiced law for 20 years, received the designation of Queen’s Counsel in 1982. He was educated at the University of New Brunswick and Queen’s University. As a parliamentarian Tilson has served as Acting Chair of the Standing Committee on Access to Information, Privacy, and Ethics and Chairman of the Standing Committee on Citizenship and Immigration. He is the President of the Canada-Europe Parliamentary Association.
He is married to Judith Birchall, a lawyer, and together they have three children. Tilson is a lifetime member and past president of the Optimist Club of Orangeville. He has also been involved in the Boy Scouts and Big Brothers.