It was first as a teacher and researcher that Bertrand honed his expertise in criminal law. He dedicated his doctoral thesis to "the restorative function of criminal punishment."

After defending his thesis, which was awarded the Panthéon-Assas Prize, Bertrand joined a law firm specializing in cases before the Court of Cassation. For fifteen years, Bertrand explored all areas of substantive and procedural criminal law, honing his skills in the art of legal argumentation, both in the supplementary briefs he prepared daily and in the context of priority preliminary rulings on constitutionality.

In 2021, Bertrand decided to establish his own practice. From business criminal law to press law, including labor and environmental criminal law, Bertrand puts his fifteen years of scientific expertise and drafting skills at the service of individuals and businesses, representing them at every stage of criminal proceedings.

Bertrand is also a member of the International Union of Lawyers and the Association of Criminal Lawyers, and teaches the practice of drafting pleadings and preliminary rulings on constitutionality (QPC) in the Master 2 program in Civil and Judicial Law at the Faculty of Law in Orléans.

And to unwind after a grueling hearing, Bertrand retreats to his black piano. Nothing beats a little improvisation on a jazz standard…

Bertrand practices criminal law.