Gérald Tremblay is a lawyer and a member of the Barreau du Québec since 1970. He holds an MBA with distinction (1972) from Harvard Business School.

He worked as a financial analyst with Dun & Bradstreet before becoming senior associate and director general of a consulting firm, member of the Sobeco Group Ernst & Young. He developed a new concept for turning around businesses and applied it to the manufacturing, financial and wholesale/retail sectors.

President of the Société de Développement Industriel du Québec (SDI) from 1986 to 1989 he also sat on the board of directors of the Caisse de dépôt et placement du Québec and on the executive committee and board of directors of Hydro-Québec.

From 1989 to 1994, he was Minister of Industry, Trade, Science and Technology, and he conceived and implemented the Quebec economic strategy based on the industrial clusters concept.

Since May 1st, 1996, Mr. Tremblay is president of the Centre de perfectionnement de l'École des Hautes Études Commerciales. He is also founder of the Institute for social and economic progress.

He is also a member of the board of directors of several public, private companies and non profit organisations.

Since November 4, 2001 Mayor of the new city of Montreal.