He was a Progressive Conservative member of the Legislative Assembly of Ontario who represented the riding of Perth—Wellington as MPP from 2011 until he stood down at the 2022 election.

[2] Pettapiece served two terms as a councillor for the township of North Perth, Ontario.

[2] In the 2011 provincial election, he ran as the Progressive Conservative candidate in the riding of Perth—Wellington.

[2][3] He was re-elected in the 2014 election defeating Liberal candidate Stewart Skinner by 2,486 votes.

[4] He is the party's critic for Community and Social Services and for Horse Racing.