[3] He competed for Armenia in the 2016 Summer Olympics, where he won the silver medal in the men's 105 kg competition.

After the snatch portion of the competition, Ruslan Nurudinov was out of the running for a total (as he did not complete a lift), and Yang Zhe was leading Martirosyan by 1 kg.

He competed against silver medalist in the previous championships (Yang Zhe) and 2008 Olympic Champion (Andrei Aramnau).

[9] In 2021, he won the bronze medal in the men's 109 kg event at the 2021 World Weightlifting Championships held in Tashkent, Uzbekistan.

He won gold medals in the snatch, clean & jerk and total, outlifting silver medalist Vasil Gospodinov by 17 kg.