Caroline Di Cocco was elected in 1999 and re-elected in 2003. In opposition, she served as critic for culture, heritage and recreation and sat on the Legislative Assembly Committee.

Ms. Di Cocco was elected a councillor for the City of Sarnia in 1997. She has served on various city committees including the Tourism Development Task Force, the Sarnia Museum Committee, the Convention and Visitors Bureau board of directors and the Business Retention and Expansion Project.

From 1978 to 1985, Ms. Di Cocco was a founding member of a school parent council and worked on the Canada Day Committee. She has been an executive member of the Sarnia-Lambton Folk Arts and Multicultural Council. She co-authored the book One by One....Passo Dopo Passo, a history of the Italian community in Sarnia-Lambton from 1870 to 1990. In 1989, she founded the International Wine Gala, which showcases the art of making homemade wine and continues today with proceeds to charity.

Ms. Di Cocco is certified under the ARCT (Associateship of the Royal Conservatory of Music). She is a past president of the Sarnia branch of the Ontario Registered Music Teachers’ Association and has directed church choirs. She is completing a social sciences degree from the University of Western Ontario.

Ms. Di Cocco spearheaded a seven-year quest for a judicial inquiry regarding misspending of public funds. She represented the interests of taxpayers during the eight-week judicial inquiry in 1998. Justice Gordon Killeen called her work "dogged, skilful, and of high quality."

In 2002, she was awarded a knighthood (Cavalieri) from the Republic of Italy.