Mary Polak was re-elected to the B.C. legislature in 2013, having represented the constituents of Langley since 2005. She was appointed Minister of Minister of Environment June 10, 2013.

Prior to her new cabinet post, she served as the Minister Transportation and Infrastructure, Minister of Aboriginal Relations and Reconciliation, Minister of Children and Family Development and Minister Responsible for Child Care, Minister of Healthy Living and Sport, and Parliamentary Secretary to the Minister of Health for the Conversation on Health.

Before being elected to the legislative assembly, Polak served as a trustee and former chair of the Surrey school board.