After a two-year service in the Soviet Army, he returned to Yerevan in 1985 to establish—with Vahram Sahakian—the private theatre studio called Vozniner (Ոզնիներ, "Hedgehogs").

Between 1988 and 1992, when the Karabakh movement was in progress, Petrosyan wrote and staged several politically motivated performances.

[2] Beginning in 2000, Vardan Petrosyan has been mainly performing one-man shows on various politics and social issues.

Besides Armenia, he has also performed for the Armenian diaspora communities in the United States, France, Canada, Lebanon, Iran, Syria, Russia, etc.

[6] After being treated in a Yerevan hospital, on November 9, Petrosyan was charged with "negligent breach of traffic rules, which causes death" and was taken into custody.