Main works are dedicated to Armenian History of the 2nd half of 19th century and 1st half of 20th century, historical statistics, history of Artsakh and Zangezur from 1918 to 1921

Graduated from YSU in 1977. Doctor of Historical Sciences (2001), Professor (2005), Correspondent Member of NAS of RA (2006)

YSU Rector (2006-2019), Member of the Presidium of NAS RA (2011-2021)

Was awarded by Movses Khorenatsi Medal (2009)

Scientific Researcher of the Institute of History, National Academy of Sciences of RA (1982-1986); Assistant Professor at the Department of History of USSR (1986-1989); Acting Associate Professor, Associate Professor (1989-1991); Associate Professor, Department of Armenian History (1991-2001); Professor (from 2001), Scientific Secretary of YSU (1992-1995); Head of Academic Affairs Office, YSU (1995-2000); Vice-Rector for Academic Affairs, YSU (2000-2006)