Lisa Dennison

Lisa Dennison is the chairman of Sotheby's North and South America. She was previously the director of the Solomon R. Guggenheim Museum in New York City. She became director in 2005 and resigned in 2007 to work at the auction house Sotheby's, where she is now Chairperson.

In October 2005, Dennison became the director of the Guggenheim Museum and replaced seventeen-year director Thomas Krens, as the director of the Solomon R. Guggenheim Foundation. She was also approached by the Los Angeles County Museum of Art and the Cleveland Museum of Art to serve as a director there.