He first led the Company in two Ring cycles in 1990 and has since conducted more than sixty productions here, including the world premieres of Adams???s Doctor Atomic and Susa???s The Dangerous Liaisons; the West Coast premiere of Wallace???s Harvey Milk; the North American premiere of Messiaen???s Saint Fran??ois d???Assise; and the 1999 and 2011 Ring cycles.