Corbeil went to the Université de Montréal and obtained a doctor's degree in dentistry in 1978 before becoming an associate at a local dental clinic.

Corbeil jumped into provincial politics in 2003 when he was elected as MNA for Abitibi-Est as the Liberals under the leadership of Jean Charest.

His term was marked by several closures of plants and sawmills in the lumber sector, including Domtar, which cost several hundred jobs for regions such as the Outaouais, Nord-du-Québec and Abitibi-Témiscamingue.

Restructuring plans were tabled by the Minister in order to re-launch the economy of several towns affected by the closures due to the softwood lumber dispute.

Corbeil was defeated in the 2007 election by the Parti Québécois's aboriginal candidate Alexis Wawanoloath.