Eric Lefebvre's litigation practice involves a broad range of commercial litigation matters, including competition law, class actions, banking, consumer law, corporate disputes, and commercial contracts. He has particular experience in urgent remedies such as seizures and injunctions of various kinds, including Anton Piller orders. He has been retained both by petitioners and respondents in many high-stakes shareholder oppression cases and has defended parties facing cartel and bid-rigging accusations before criminal courts. Lefebvre represents clients before the Quebec and federal courts as well as before regulatory bodies such as the Competition Tribunal. He has been involved a great many searches and seizures conducted by the Competition Bureau as well as ensuing internal investigations and litigation. In addition, he acts in commercial arbitration proceedings. Lefebvre was head of the firm's Montreal litigation group between 2016–20.