2010-11: Julien Pelletier played in the hockey program at the Nicolas-Gatineau school in Quebec.
2011-12: Pelletier skated for the Gatineau L’Intrepide midget AAA team. In 39 games he scored 6 goals with 18 assists and 44 penalty minutes. Gatineau finished third in the CCM Division. Pelletier scored 1 goal with 4 assists in six playoff games. He was selected by Cape Breton in the third round (39th overall) of the 2012 QMJHL Entry Draft.
2012-13: Pelletier appeared in seven QMJHL games with Cape Breton and was a team captain for the Gatineau L’Intrepide. He scored 1 goal and was -4 with 2 penalty minutes in his brief time with the Screaming Eagles. Pelletier was the second-leading scorer for Gatineau; which finished with the worst record in Quebec AAA hockey. He led the team with 23 goals and had 20 assists with 44 penalty minutes in 34 games.
2013-14: Pelletier was one of the top rookies in the QMJHL in his first season with Cape Breton. He scored 25 goals with 25 assists and was -8 with 28 penalty minutes in 67 regular season games for the Screaming Eagles. Cape Breton finished second in the Maritimes Division before being swept by the Gatineau Olympiques in the playoffs. In four playoff games Pelletier scored 1 goal with 1 assist and was -4 with 2 penalty minutes. He was ranked 62nd amongst North American skaters in Central Scouting’s final rankings prior to the 2014 NHL Draft.
Average-sized, Pelletier's contributions come from him consistently making smart decisions on the ice, especially in the offensive zone. He has a knack for getting the jump on defenders and surprising them, affording himself the chance to either release his quick wrister or set up one of his teammates. Still rounding out the rest of his game, Pelletier will only become more dangerous as he gets quicker and stronger.