Guillermo is an Assistant Professor at Department of Renewable Resources, University of Alberta. He received his B. Sc. agronomy from EARTH University (Costa Rica), and his Ph. D. soil science from Purdue University (Indiana, US). He previously worked as a agriculture and soil science professor at University of Panama (Panama), as a postdoctoral researcher with USDA-ARS at the National Laboratory for Agriculture and the Environment (Iowa, US), and as a scientist with Plant and Food Research Institute (New Zealand).