Career
Born in Byala, Rousse Province, Kolev played in the youth teams of PFC Litex Lovech. He represented Bulgarian teams PFC Lokomotiv Mezdra, Benkovski Byala, Kom-Minyor, OFC Sliven 2000 and PFC Chavdar Byala Slatina before moving abroad. In the winter break of the 2011-2012 season, he moved first time abroad, to play with Moldovan National Division side Football Club Costuleni.
Then in summer 2012 he moved to Montenegro where he signed for FK Čelik Nikšić.