 Domingue was drafted 13th overall by the Moncton Wildcats in the 2008 Quebec Major Junior Hockey League (QMJHL) Entry Draft, and he played major junior hockey in the QMJHL with both the Wildcats and the Quebec Remparts.Then he was selected to play in the 2010 CHL/NHL Top Prospects Game.Domingue was subsequently drafted by the NHL's Phoenix Coyotes and, on June 1, 2011, he was signed by the team to a three-year, entry-level contract.