John W. Olsen, Ph.D., is an American archaeologist and paleoanthropologist specializing in the early Stone Age prehistory and Pleistocene paleoecology of eastern Eurasia. Olsen is Regents' Professor Emeritus of Anthropology and Executive Director of the Je Tsongkhapa Endowment for Central and Inner Asian Archaeology at the University of Arizona in Tucson, Arizona, USA. He is also a Lead Scientific Researcher at the Institute of Archaeology and Ethnography of the Russian Academy of Sciences' Siberian Branch (Ведущий научный сотрудник, Институт археологии и этнографии CO PAH) in Novosibirsk and Guest Research Fellow at the Chinese Academy of Sciences' Institute of Vertebrate Paleontology and Paleoanthropology (IVPP; 中国科学院古脊椎动物与古人类研究所客座研究员) in Beijing where he is also Co-Director of the Zhouk