André Legault studied law at University of Montreal and was admitted to the Quebec Bar in 1973.

He practiced two years within a Legal Aid office, and currently practices privately within the law firm since 1975.

The professional expertise of André Legault is focused on Labour and employment law: wrongful dismissal, unfair labour practice complaints, labour arbitration and dispute resolution, workers' compensation for invalidity, union negligence and health and safety prosecutions.

André Legault regularly pleads before civil and administrative courts, in relation to judicial and administrative review, insurance law and professional liability and intellectual property.

André Legault actually manages an important governmental class action for a group of state workers against their union and the Quebec government.

André Legault actively participated in the adoption and modification of several laws, such as the Consumer Protection Act, the Labour Standards Act, the Class Action Act, the Industrial Accidents and Occupational Diseases Act and the Labour Code.

André Legault is socially and politically involved. He is an active member of the Graduated Association of Law Faculty of University of Montreal.

André Legault also represents the interests of numerous associations in matter of education, equity and individual and collective protection of rights.