[citation needed] Before seeking elected office, Duguid worked in government services at the municipal, provincial and federal levels, serving as executive assistant to Metro Councillor Scott Cavalier, Ontario MPP Frank Faubert, and Liberal Members of Parliament Catherine Callbeck and Derek Lee.

[citation needed] On May 1, 2003, Duguid was appointed by Liberal leader Dalton McGuinty as the party's candidate for Scarborough Centre in the upcoming provincial election.

This upset many in the local party association, as 1999 Ontario general election candidate Costas Manios was widely expected to win the nomination again.

[4] Instead, the provincial trend overrode local factors—Duguid defeated incumbent Progressive Conservative Marilyn Mushinski by over 10,000 votes, while Manios finished fourth, behind Michael Laxer of the Ontario New Democratic Party.

[5] On October 23, 2003, Duguid was appointed Parliamentary Assistant on urban issues to John Gerretsen, the Ontario Minister of Municipal Affairs and Housing.

[10] In the Cabinet, post election, on October 20, 2011, Brad Duguid was appointed Minister of Economic Development and Innovation.

[11] In December 2012, CTV London reported that some of Minister Duguid's Christmas cards were sent without postage, instead using franking stickers only available to the monarch, federal MPs, senators and certain parliamentary employees.