Mtre Dionne holds a Bachelor of Civil Law (LL.B.) and a Juris Doctor in Common Law (J.D.) from the Université de Sherbrooke. During his studies, he was involved as an ambassador for his university as well as with the National Student Pro Bono Network of Canada and the Coaticook Legal Aid Office.

Having started his practice in Montreal, he has oriented his practice towards civil and commercial litigation with an emphasis on construction, real estate and liability law, for a diverse bilingual clientele including developers, contractors, subcontractors, owners and individuals. He is called upon to advise and represent his clients before the various judicial authorities in Quebec, including arbitration.

He is recognized for his multi-faceted approach based on rigor, professionalism and clear communication adapted to his clientele with a view to developing and implementing strategies and practical solutions adapted to the needs of his clients.