He is a former World, European, four-time Soviet and multi-time Armenian Champion.

Munchyan won a gold medal at the 1987 European Amateur Boxing Championships.

After the Union's fall in 1991, Munchyan began representing his native Armenia.

He is the first boxer from the independent Armenia to win a medal in either competition.

Munchyan competed at the 1996 Summer Olympics where, after receiving a first round bye, he lost to Daniel Petrov, whom he previously defeated at the 1993 World Championships finals.