He competed at the 2019 World Weightlifting Championships in the 109 kg category after a convincing win at the 2019 European Weightlifting Championships. He competed against silver medalist in the previous championships (Yang Zhe) and 2008 Olympic Champion (Andrei Aramnau). During the snatch competition Zhe, Aramnau and Martirosyan had their third snatch attempts in succession completed a world record lift each time. Zhe completed a 197 kg snatch, Aramnau with a 198 kg snatch and finally Martirosyan with a 199 kg lift. During the clean &amp; jerk portion Martirosyan was the last lifter to make an attempt and with his lift of 230 kg he secured the gold medal in the clean &amp; jerk and total.