Sourian is 2012 Summer Olympic games gold medalist and six-time World Champion.

Sourian was defeated in the bronze medal match by South Korea's Park Eun-Chul, Sourian had beaten Park in two different world championship finals prior to this Bronze medal match.

[2] On 5 August 2012, he won his country's first ever gold medal in Greco-Roman wrestling, defeating Azerbaijan's Rovshan Bayramov in the 55 kg final.

[3][4] After failing to qualify for the World Championship games and Continental Qualifier, on 3 May 2016 Sourian entered the second of the two worldwide qualification tournaments for the 2016 Summer Olympics in Turkey after failing to overcome Ivo Angelov from Bulgaria in Mongolia.

Again he was comfortably in the lead by 7–0 in the first half and then only needed one point for victory in the second, but his energy levels dropped towards the end and he lost the bout.