In 1990, he joined the Soviet Armed Forces becoming an official conductor for the bands of the Transcaucasian Military District.

In 1992, he resigned from his position in the Soviet Army, and was invited to lead the newly formed Band of the General Staff of the Armed Forces of Armenia.

[3][4][5] On 25 February 2021, he was one of 40 top Armenian officers who signed a statement drafted by Chief of the General Staff Onik Gasparyan calling for the resignation of Prime Minister Nikol Pashinyan.

He also leads the band during Spasskaya Tower Military Music Festival and Tattoo on Red Square in Moscow in 2017.

[9][10] In 2013, Belarusian President Alexander Lukashenko thanked and praised Poghosyan during his state visit to Yerevan for what he considered a very good performance of the Belarusian Anthem (My Belarusy), telling Poghosyan as he inspected the honor guard: He authored many official marches, including the song "I have the honor"[12] and "Adagio".