Regents' Professor Emeritus, Arizona State University

Prof. George Washington Univ.

CSIC (Spanish National Research Council - IMF, Barcelona)

University of Wyoming, Department of Anthropology

Professor Emeritus University of Western Ontario

University of Pisa, Department of Civilizations and Forms of Knowledge

Anthropology, University of Victoria, Associate Professor (retired)

Turkana Basin Institute Stony Brook University

Professor of Archaeology and Scientist 3 University of the Philippines

Harvard University