Career
Markosov has played for several Russian clubs in the Russian Second Division and Russian First Division. His professional career began in 2004 in Football Club Zhemchuzhina Budyonnovsk. He then moved to Football Club Kavkaztransgaz Ryzdvyany.
In 2007, he made his debut in the Russian First Division in Football Club SKA Rostov-on-Don.
Markosov began the 2008 season in. He was the top goalscorer in the 2008 Russian Second Division South Zone, scoring 27 goals, a feat no one in the entire Second Division surpassed.
In the 2010 season, he played for Football Club Rotor Volgograd and came back to the next season. Scoring 10 goals in his first 10 matches for Dynamo, Markosov was transferred in the summer transfer window of the 2011-2012 season to Football Club Ufa.
He joined the Armenia national football team in 2013.
Markosov"s debut game was on February 5, 2013 in Valence, France in a friendly match against Luxembourg.