2010-11: Julien Nantel was one of the top players in Montreal metropolitan area Bantam AA hockey skating for Laval.
2011-12: Nantel skated in Quebec’s midget AAA league as a 15-year-old; playing 40 games for the Laval-Montreal Rousseau Royal. He scored 11 goals with 17 assists and had 8 penalty minutes. Nantel was selected by Rouyn-Noranda in the second round (30th overall) of the 2012 QMJHL Entry Draft.
2012-13: Nantel made his QMJHL debut — appearing in four games with Rouyn-Noranda — and was a key player for Laval-Montreal as the Royal won a bronze medal at the 2013 Telus Cup. He was the lone midget AAA player to skate for Canada Quebec at the 2013 U17 World Hockey Challenge. Nantel appeared in one December game and three February contests with the Huskies; scoring 1 goal and finishing minus-1. He scored 19 goals with 21 assists and had 18 penalty minutes in 36 regular season games and was the MVP of the QMAAA playoffs after scoring 6 goals with 11 assists and 6 penalty minutes in 17 playoff games. In seven games at the Telus Cup he scored 5 goals with 5 assists and 2 penalty minutes. Nantel scored 1 goal with 4 penalty minutes in six games at the WHC.
2013-14: Nantel joined Rouyn-Noranda for his first full QMJHL season; skating on a talented Huskies team that was fifth in the competitive West Division. In 68 regular season games he scored 14 goals with 20 assists and was plus-2 with 18 penalty minutes. The Huskies reached the second round in the playoffs and Nantel had 4 assists and was an even plus/minus with 2 penalty minutes in nine playoff games. He was ranked 51st amongst North American skaters in the Central Scouting final rankings and was selected by Colorado in the seventh round (204th overall) in the 2014 NHL Draft.
Nantel is best known for his compete level and tenacity. He has an above average shot and above average hockey IQ which has helped him contribute offensively at the junior level.