Youssef's practice covers various aspects of commercial and civil law. He advises companies and individuals in various areas, such as civil litigation and commercial dispute resolution, class actions, and bankruptcy and insolvency. He also advises on administrative and regulatory matters.

During his articles with the Firm, Youssef was seconded to the legal department of the Caisse de Dépôt et Placement du Québec.

Youssef speaks English and French fluently and has an intermediate knowledge of Arabic.