Master Warrant Officer Benoit Pruneau was born in Montreal on 6 December 1973. He left the Lanaudière region to attend the Cégep de Sherbrooke, where he completed a diploma in administrative studies. He joined the Fusiliers de Sherbrooke on 15 November 1992; six years later, he transferred to the Régiment de Maisonneuve as a master corporal. He completed his undergraduate degree in operations and production management in 1999 at the école des Hautes études Commerciales in Montreal.
In 1995, he participated in Operation Cavalier, which was part of a United Nations peacekeeping mission in Bosnia-Herzegovina. In 1999, he began his civilian career as a logistics planner, expanding into four industries (sports, aeronautics, furniture and medical), while continuing his military work in roles such as section commander, platoon second-in-command and instructor. Since July 2007, he has held various staff positions. At the Régiment de Maisonneuve, he acted as operations coordinator and training sergeant major, and at LFQA/JTF (East) HQ, he was watch officer and J93-2. He is currently the administration officer at Montreal Garrison (5 ASG). He was promoted to the rank of master warrant officer on 14 May 2010.