Barbero came fifth in the World Junior Chess Championship of 1978.[2] He was Argentine champion in 1984[3] and played on board one for the Chess Olympiad team in 1990. He played six times for Argentina, between 1978 and 1994, at the Chess Olympiads.[4] Barbero was awarded the title of Grandmaster in 1987.[1]
In 1986 he moved to Budapest, Hungary, where he married Dr. Katalin Marietta Molnár and had a son, János Américo Barbero. His grandchildren are János Fabián Barbero and Miklós José Barbero. In Hungary, he developed a friendship with Bobby Fischer, who, according to GM Eugenio Torre, "liked Barbero".[2] He died in Budapest of cancer in 2001.[5]
The third chapter of Tibor Karolyi's 2009 book Genius in the Background is devoted to him.