Nguyen started the season with a silver medal at the inaugural Skate Canada Autumn Classic, an ISU Challenger Series event. He made his senior Grand Prix debut at the Skate America, winning the bronze medal. He continued to his second Grand Prix event, the Cup of China, where he placed fourth. This placed him ninth in the final Grand Prix standings, making him third alternate for the final. In December, he won the gold medal at the Skate Canada Challenge, the qualifying event for Canadian Nationals. In January, he won his first senior national title, outscoring the silver medallist by more than 30 points. After placing eleventh at the 2015 Four Continents, he finished fifth at the 2015 World Championships in Shanghai, recording his personal best scores in both segments.