The SAC, constituted in March 2007, consists of:

Sir Michael Atiyah (Edinburgh)
Octavian Cornea (Montréal, Dir. ISM)
David Ellwood
(Clay)
Jacques Hurtubise (McGill)
Francois Lalonde (Montréal, Dir. CRM)
David Mumford
(Brown)
Graeme Segal
(Maths, Oxford)
Stephen Smale
(TTI Chicago, UCB Emeritus)
Jim Stasheff (Pennsylvania, UNC Emeritus)
Edward Witten
(IAS, Princeton)