Noh won the 2010 Junior World Championships, and due to the format of the South Korean National Team selection rules, he was able to win a spot on the team with his speediness on the ice for the 2010-2011 season despite his inexperience compared to veterans of the sport. He quieted critics of his placement on the team by performing well at the 2011 Asian Winter Games, but struggled against experienced skaters at international events during the 2010–11 ISU Short Track Speed Skating World Cup, where technical aspects such as positioning skills are considered essential.
Overcoming his performances during the World Cup season, he dominated at the 2011 World Short Track Speed Skating Championships, winning gold in every race except the 500 m, where he did not qualify for the quarterfinals. He won the overall World Championship in his first season on the senior level. In the following week, Noh helped Korea to win 2011 World Team Championships (last one to be scheduled into foreseeable future) in Warsaw, setting a new world record in 3000m in the process.
He would compete on 2014 Sochi Olympics, but ruled out of the Olympicsdue to a broken elbow. Upon further inspection, he had a five-inch malignant tumor in his shoulder.