Monea lost to Pozniakas in the 1967 and 1969 European championships. He retired around 1969 with a record of 203 wins out of 217 bouts. In 1974 he became an AIBA international referee and later coached the national team of Seychelles in 1983-1988.
Between 1991 and 1994 he served as president of Lithuanian Boxing Federation.
He died of a heart attack in 2005, aged 65. Since 2005, and annual boxing tournament is held in Vilnus in his honor.