Harvard University | Columbia University | Yale University | University of Paris | New York University | Stanford University | Princeton University | University of Cambridge | University of Pennsylvania | University of Michigan | University of Chicago | University of California, Berkeley | University of Toronto | Cornell University | University of Oxford | University of London | University of Oslo | Cambridge University | University of Southern California | McGill University | Johns Hopkins University | Northwestern University | University of California | Brown University | University of Queensland | University of Minnesota | University of Washington | University of Notre Dame | University College London | Duke University |
Walker has been a professor at such Chinese universities as Beijing Normal University, Guizhou Normal University, and both Wuhan, and Sichuan Universities and was a member of both the Board of Visitors and the Defense Foreign Language Institute.