[3][4][5][6][7] As of 2021, Caldeira is Senior Scientist in the energy research company Breakthrough Energy, Senior Staff Scientist (emeritus) in the Carnegie Institution for Science's Department of Global Ecology, and Professor (by courtesy) in the Stanford University Department of Earth System Sciences.
[10] In 2005, Caldeira joined the Carnegie Institution for Science Department of Global Ecology as a senior scientist, where his job is "to make important scientific discoveries.
[12] Caldeira served as a member of the committee producing the 2015 U.S. National Academy of Sciences report Geoengineering Climate: Technical Evaluation and Discussion of Impacts.
[17] Caldeira was coordinating lead author of the oceans chapter for the 2005 IPCC report on Carbon Capture and Storage.
"[20] He said that while the other statements attributed to him by authors Steven Levitt and Stephen Dubner are "based in fact", the casual reader could come up with a misimpression of what he [Caldeira] believes.
"[23] In 2013, with other leading experts, he was co-author of an open letter to policy makers, which stated that "continued opposition to nuclear power threatens humanity's ability to avoid dangerous climate change.