Tokyo University of Agriculture and Technology

University of Toronto, Institute of Forestry and Conservation, Daniels Faculty

Emeritus Professor of Forest Ecosystems, Oregon State University

University of Utah

Swiss Federal Research Institute WSL and ETH Zurich

Guest Scientist at the Institute for Forest Snow and Landscape Research (WSL)

Pennsylvania State University

Professor of Plant Physiology, University of Trieste, Dept. Life Sciences

University of Montana

Research Physiological Ecologist, US Geological Survey