PhD from the Ohio University, Master Degree in Geophysics/Glaciology from the Hokkaido University (Japan) and Hydraulic Engineer from the Universidad de Chile. He was pioneer in say that glaciars were in danger because of the climate change. He is researcher at the Department of Glaciology and Climate Change of the Centro de Estudios Científicos (CECs) since 2002. Also, he is deputy director of the Scientific Committee for the Climate and Cryosphere Project, lead by Climate Research World Program and the Antartic Research Scientific Committee, in addition, he is vice president of the International Association of Criospheric Sciences. He was member of the Climate Change Intergovernmental Panel which was awarded with the Nobel Peace Prize in 2007.