 He was an elected member of the Board of Trustees of the American Mathematical Society serving as the Chair of the Board of Trustees, 2014–2015.One of his doctoral students (joint with Karol Borsuk) was Krystyna Kuperberg.In 1998 he was elected fellow of the American Association for the Advancement of Science (AAAS) and in 2012 he became a fellow of the American Mathematical Society where he is an Honorary Life Member.