Mr. Petrosyan graduated with a degree in economics and management from Moscow State University in 2001.
From 1993-1995 he was a commercial deputy director in the State Retail Trade Firm # 11 in Sevan. From 1997-1998 he was first the manager and later head of the Receptions House Food Unit under the RA Government Staff. From 1998-2003 he was first the deputy head and later head of the Plane Services General Department of Haykakan Aviaoughiner CJSC under the General Department of the RA Civil Aviation. He was also the head of Special Aviation Safety Services at Zvartnots International Airport, manager of the Commercial Service and Consumer Service in Haykakan Aviaoughiner CJSC.
On May 25, 2003 he was elected to the NA from electoral district # 33 and he is currently on the NA Standing Committee on Defense, National Security and Internal Affairs. He is a member of both the Rule of Law Faction and party.
Mr. Petrosyan is married and has one child.