In 2016, she was appointed the Chancellor of Wilfrid Laurier University, having formerly served as chair of the board of directors of Payments Canada and Ontario Teachers' Pension Plan.
[3] Mercier subsequently attended Waterloo Lutheran University for her Bachelor of Arts degree in English, graduating in 1968.
[8] Besides OTPP, Mercier also served as a board member of CGI Group, Intact Financial, ING Bank of Canada and Teekay.
As a member of the board of trustees at University Health Network, Mercier and the ING Foundation jointly donated over $356,000 toward a tissue-engineering project focused on repairing heart damage in children.
[6] In May 2016, Mercier was named to the nominating committee that would recommend candidates to serve on the Ontario Retirement Pension Plan Administration Corporation's board of directors.