Background
He was born in the village of Angeghakot, Sisian Oblast, Armenian Soviet Socialist Republic.
He was born in the village of Angeghakot, Sisian Oblast, Armenian Soviet Socialist Republic.
Mirzoyan was awarded the Honoured Master of Sports of the Union of the Soviet Socialist Republics title in 1984 and the Honored Coach of Armenia title in 1998. In 1965, his family moved to the village Baghramyan, Echmiadzin region. In 1977, he began weight training under the guidance of Ashot Vilasyana.
In the following year, he was able to perform with the normal masters of sports of the Union of the Soviet Socialist Republics. In the course of both the competitions, Mirzoyan set new world records in the snatch, clean and jerk and the total exercise, all in the bantamweight (56 kg) division.
Due to the 1984 Summer Olympics boycott, Mirzoyan was unable to participate that year. Mirzoyan had begun to pass his prime.
Over the next few years he had started coming behind Bulgarian rivals Mitko Grablev and Neno Terziyski in competitions. In early 1988, Terziyski failed a doping test, resulting in a ban from weightlifting.
However, Grablev also tested positive for doping and was disqualified.
Oksen Mirzoyan completed his weightlifting career in 1991 and later took up coaching and sports officialing. He became the Head Coach of the Armenian national weightlifting team Mirzoyan was also the Chairman of the Armenian Weightlifting Federation from 1998–2004.
As of 2004, Mirzoyan is the Vice-President of the National Olympic Committee of Armenia and the director of the Yerevan School Sports in weightlifting.
Mirzoyan was reelected one of the Vice-Presidents of the National Olympic Committee of Armenia on 9 March 2013.
In 1981, Mirzoyan became a member of the Union of the Soviet Socialist Republics national weightlifting team