Dr. Charlie Ćurčija is a scientist at Lawrence Berkeley National Laboratory in the Energy and Environmental Technologies Division, leading the research in thermal and optical performance of windows and other fenestration systems. Charlie earned his Ph.D. at the University of Massachusetts in the field of thermal performance of windows in 1992 and prior to that earned his Bachelors degree in 1982 at the University of Belgrade, Serbia. He started his career as a mechanical design engineer in Belgrade before coming to United States in 1987 to pursue graduate studies at the University of Massachusetts. After obtaining his Ph.D. from Umass, Charlie started working as a Post Doc within the same research group and later continued as a Senior Research Fellow. In 1998 he joined the Center for Energy Efficiency and Renewable Energy (CEERE) at Umass and was a leader of the Building Energy Efficiency Program until 2006 when he left his job at University to devote full time to run private consulting and software development business Carli, Inc. He joined LBNL in October of 2010. He has been working in the area of energy performance of buildings and building facades for over 30 years. He has authored over 50 publications.