In 1977 he was awarded the Guinness Prize for Composition. In 1979, the Scottish Chamber Orchestra appointed Berkeley its associate composer. Berkeley was Composer-in-Association with the BBC National Orchestra of Wales from 2000 until 2009. He also acted as Visiting Professor in Composition at the Royal Welsh College of Music & Drama and was Artistic Director of the Cheltenham Music Festival from 1995 to 2004. In 2002 and 2003 he was international guest curator of chamber music programs at the Sydney Festival, Australia's largest arts festival.