Art Rosenfeld, Professor of Physics Emeritus at U.C. Berkeley, was the last graduate student of Nobelist Enrico Fermi. In 1955 he joined the Physics faculty at U.C. Berkeley, and the research group of Luis Alvarez, who later received the Nobel Prize in 1969 for the discovery of a dozen subatomic particles. In 1974, in response to the OPEC oil embargo, Rosenfeld switched to the new field of efficient use of energy, and founded the LBNL Center for Building Science, which he led until 1994, when he was appointed Senior Advisor to the Dept. of Energy (DOE), Assistant Secretary for Energy Efficiency and Renewable Energy. At the end of the Clinton Administration in 2000 he was appointed Commissioner at the California Energy Commission, where he served two terms until 2010. Meanwhile, in 2006 he received from the President and the Secretary of Energy, the Enrico Fermi Award for his contributions to energy efficiency. He is currently Guest Senior Scientist, in the EETD Division at LBNL.