After a distinguished 29-year career at the Guggenheim, where she served as Director from 2005, Ms. Dennison joined Sotheby’s in September 2007, focusing on international business development-—a role that draws on her considerable strengths as an internationally recognized figure in the fields of Modern and Contemporary Art. Over the years, Ms. Dennison has developed outstanding relationships with important collectors, artists and experts worldwide. During her tenure as Director and Chief Curator of the Guggenheim, she strengthened the visibility and reputation of the museum while helping it realize its institutional goals as a flagship of its premier global network. She was “one of the Guggenheim’s greatest assets,” noted Thomas Krens, who preceded her as the Foundation’s Director. In addition to being responsible for the permanent collection, Ms. Dennison organized over 35 shows for the Guggenheim museums worldwide, including retrospectives, site-specific installations and commissions by artists including Ross Bleckner, Daniel Buren, Francesco Clemente, Dan Flavin, Jeff Koons, James Rosenquist, Lawrence Weiner, and Rachel Whiteread. Her connections to the world’s top collectors and her art-historical expertise make her a vital addition to Sotheby’s international team. Ms. Dennison earned her Bachelor of Arts degree from Wellesley College in Art History and French in 1975, and received a Master of Arts degree in Art History from Brown University in 1978.