Nach-Bild, Kunsthalle Basel, Basel, Switzerland, June 12 - August 22, 1999
Carnegie International 1999/2000, Pittsburg, Pennsylvania, November 6, 1999 - March 26, 2000
Objective Color, Yale University Art Gallery, New Haven, Connecticut, February 2 – August 19, 2001
Extreme Abstraction, Albright-Knox Art Gallery, Buffalo, New York, July 15 - October 2, 2005