She was elected to council in the 2001 municipal election for the Laurier division, defeating incumbent candidate Richard Théorêt of the Montreal Island Citizens Union (MICU). MICU won a council majority in this election, and Poulin served as a member of the official opposition with Vision Montréal with former mayor of Montreal Pierre Bourque.
In 2001 municipal election was the first to be held in Montreal after the city's amalgamation with neighbouring suburbs. In 2002, Poulin accused Montreal mayor Gérald Tremblay of failing to decentralize administrative services in the city's pre-amalgamation borders.
She was the president of the urbanism commission of borough Plateau Mont-Royal, and member of the Commission on corporate business, strategic management, human capital and ethnocultural diversity.
In 2005, Poulin joined with Toronto city councillor Olivia Chow and Calgary city councillor Ric McIver to take part in Xerox Canada's "Colour for Charity" campaign. The three councillors were publicly painted a variety of vibrant colours, in return for receiving a combined ten thousand dollars to donate to a charity of their choice.
By virtue of her position on city council, Poulin also served on the Plateau-Mont-Royal borough council. She ran in the De Lorimier ward in the 2005 and was defeated by Projet Montréal candidate Carl Boileau who give is place to Richard Bergeron.
She participated in a mission to observe the elections in Ukraine in 2012 and 2019.
Christine Poulin is regulated immigration consultant, member of ICCRC, board regulation of immigration consultants in Canada, since 2013. She owns Immigration Elite Inc. She is active in CAPIC-ACCPI, the canadian professional association of immigration consultant like VP Quebec.
She holds a BA in Political Science from Laval University, a Certificate in International Business of HEC in Montreal, a master's in international management from ENAP. She finished a certificate in law from Université of Montreal.
President of the association BPW Montreal, a chapter of Business professional women international, this chapter was created since 1926. Also she participated at the creation of an association of former Québec municipal councillors in 2019.
|2005 Montreal municipal election results: Councillor, De Lorimier
|2001 Montreal municipal election results: Councillor, Laurier
- Aaron Derfel, Lisa Fitterman, Catherine Solyom, and Paul Cherry, "Holding on to Montreal: Bourque's party fares well in city, but loses downtown stronghold," Montreal Gazette, 5 November 2001, A6.
- Linda Gyulai, "Boroughs feel growing pains: We're being muzzled, watchdogs insist," Montreal Gazette, 20 December 2002, A1.
- "City councillors across Canada add splash of colour to local politics," Canada NewsWire, 30 March 2005, p. 1.