Before playing in the NHL, Fortier played 4 seasons with the Chicoutimi Saguenéens of the Quebec Major Junior Hockey League (QMJHL). He went undrafted but he was signed as a free agent on February 3, 1987. He spent his time between the Nordiques and their AHL-affiliates Fredericton Express and Halifax Citadels. After he became a free agent, Fortier signed a contract with the Ottawa Senators on October 1, 1992. He played 10 with the Senators and was traded by the Senators along with Jim Thomson to the Los Angeles Kings in exchange for Bob Kudelski and Shawn McCosh. He played 6 games with the Kings and then left.