 She was also an elected member of the "Commission scolaire de Montréal" from 1998 to 2007.Thériault was the borough mayor of Mercier–Hochelaga-Maisonneuve from 2005 to 2009 and was a member of the Montreal executive committee (i.e., the municipal cabinet) from 2009 to 2011.Thériault has held administrative positions with the "Fédération des comités de parents de la province de Québec", the "Fédération des comités de parents de l'Île de Montréal", and the "Association canadienne d'éducation de la langue français".