Justice Alexandre Boucher earned a bachelor’s degree in law from the Université de Montréal in 1994 and a master’s degree in law from York University’s Osgoode Hall Law School in 2010. He was called to the Quebec Bar in 1995.

Justice Boucher began his career as defence counsel, a practice he maintained from 1995 to 2010. He was also a Crown prosecutor, serving as agent with the Public Prosecution Service of Canada from 2006 to 2009, before joining the office of Quebec’s Director of Criminal and Penal Prosecutions in 2010. He was a law lecturer at the Université de Sherbrooke and the Université de Montréal and, additionally, gave numerous lectures and training courses for both judges and lawyers and participated in a number of Bar committees and lawyers’ associations. 

Justice Boucher was appointed to the Superior Court in 2015 and was a sitting judge in its Criminal Division when he was elevated to the Court of Appeal on December 12, 2025.