• Council on Prizes and Awards, Mathematical Association of America, 2021-present
  • Associate Editor, Notices of the American Mathematical Society, 2016-2018
  • Editorial Board, American Mathematical Monthly, 1997-present
  • Committee on Short Courses, Mathematical Association of America, 2011-2014
  • Editor, American Mathematical Monthly, 2007-2011
  • Program Committee, Mathematical Association of America, 2002, 2005, 2008
  • Committee on Logic Education, Association for Symbolic Logic, 2002-2008
  • Editor, Dolciani Mathematical Expositions, 1999-2004
  • Lester R. Ford Award Committee, Mathematical Association of America, 1995-1996