[6] Collier was first elected to Ajax Town Council in 2003 in ward 1, defeating Ralph Golberg by just 47 votes.

[12] Collier endorsed Leslyn Lewis's candidacy in the 2020 Conservative Party of Canada leadership election.

[13] During the COVID-19 pandemic Collier called on the regional health authorities to speed up the process for people seeking to get their second dose of the COVID vaccine.

[14] In 2022, Collier released a statement opposing expanding the urban boundary in Durham Region, which would allow for building new housing on farm land.

[15] Collier ran for re-election in the 2022 mayoral election on a platform of speeding up the planning process in the city.