He has a TACH (Technique en aménagement cynégétique et halieutique) diploma from the Baie-Comeau CEGEP. He has studied in Biology at UQAR and Ecology at UQAC. He is a founder and current director of the RMBMU. That designation was received, by UNESCO Organisation des Nations Unies pour l’éducation, la science et la culture , in 2007 after 5 years of work. Since 2011, he has also been the Canadian Biosphere Reserves Association’s president and is regularly called upon to represent Quebec or Canada at UNESCO activities. M. Messier works very closely with First Nations as a co-founder of the Séminaires Nordiques Autochtones. These seminars have been taking place since 2005 in Mushuau-nipi, in northern Quebec.