Russian Valery Gergiev is considered one of the world 's leading conductors . He holds three senior positions at the famed Mariinsky Theater in Russia . His first was as music director from 1985 to 1991, then he became chief conductor and artistic advisor for the Kirov Opera until his retirement in 2009. Gergiev conveys emotion to musicians , mainly through his facial expressions .
Russian Valery Gergiev is considered one of the world 's leading conductors . He holds three senior positions at the famed Mariinsky Theater in Russia . In 2007 , he joined the London Symphony Orchestra as principal conductor . Gergiev conveys emotion to musicians , mainly through his facial expressions .