Mathieu joined the firm in 2015 in order to practice civil and commercial litigation and has represented clients before Common law tribunals such as the Quebec Court, the Superior Court and the Court of Appeal. He now mainly practices in commercial and corporate law; with his primary focus being on amalgamations and acquisitions, as well as financing and commercial contracts.
Having acted as legal counsel in a large Quebec pharmaceutical enterprise, Mathieu brings practical legal solutions aligned with the needs of his clients.
Mtre Lavallée is implicated in his community, working alongside and supporting non profit organisations in their societal missions. As such, he was a member of the Comité Ambassadeurs for Moission Rive-Sud from 2018 to 2020.