Danielyan won a bronze medal at the 2004 Junior World Amateur Boxing Championships in Jeju.

[1] Danielyan won a bronze medal at the 2006 European Amateur Boxing Championships in Plovdiv.

[2] He reached the quarterfinals of the 2007 World Amateur Boxing Championships, and thus qualified for the upcoming Olympics.

[4][5] Danielyan won a gold medal at the 2008 European Amateur Boxing Championships in Liverpool.

Danielyan, along with Eduard Hambardzumyan, became the first boxers from the independent Armenia to become European Champions.