energy issues. He has recently being doing analyses of future global supply and demand of oil and energy transition issues. From 1997 to 2000, Dr. Greene served as the first editor in chief of the Journal of Transportation and Statistics, the only scholarly periodical published by the U.S. Department of Transportation. He currently serves on the editorial boards of Transportation Research D, Energy Policy, Transportation Quarterly, and the Journal of Transportation and Statistics. Active in the Transportation Research Board (TRB) and the National Research Council, Dr. Greene has served on several standing and ad hoc committees. He is past chair and member emeritus of the TRB’s Energy Committee, past chair of the Section on Environmental and Energy Concerns, and a recipient of the TRB’s Pyke Johnson Award.

Robert L. Hirsch is a consultant with Science Applications International Corporation. His past positions include executive advisor to the president of Advanced Power Technologies, Inc.; vice president, Washington Office, Electric Power Research Institute; vice president and manager, Research and Technical Services Department, ARCO Oil and Gas Company; chief executive officer, ARCO Power Technologies, a company that he founded; manager, Baytown Research and Development Division, and general manager, Exploratory Research, Exxon Research and Engineering Company; assistant administrator for Solar, Geothermal, and Advanced Energy Systems (Presidential appointment); and director, Division of Magnetic Fusion Energy Research, U.S. Energy Research and Development Administration. He has served on numerous advisory committees, including as a member of the DOE Energy Research Advisory Board and a number of DOE national laboratory advisory boards. He has served on several NRC committees, including the one that wrote the report Fuels to Drive Our Future, which examined the economics and technologies for producing transportation fuels from U.S. domestic resources; was chairman of the Committee to Examine the Research Needs of the Advanced Extraction and Process Technology Program; was a member of the Committee on Alternatives and Strategies for Future Hydrogen Production and Use; and was a former chairman and member of the Board on Energy and Environmental Systems. He has recently been involved in analysis and studies of the various views of potential global oil production, peaking, and possible transitions to other sources of liquid fuels. He brings expertise in a number of areas of science, technology, and business related to oil and gas production, analysis of oil reserves and future oil production, other forms of energy production and consumption, research and development, and public policy. He received a Ph.D. in engineering and physics from the University of Illinois.

Scott W. Tinker is director, Bureau of Economic Geology, University of Texas, Austin; State Geologist of Texas; and Edwin Allday Endowed Chair of Subsurface Geology, Jackson School of Geosciences. Earlier, he held a number of positions at Marathon Oil–Petroleum Technology Center, rising to advanced senior geologist. He was also once a geologist at Union Pacific Resources and at Robert M. Sneider Exploration. He has extensive experience in the broad aspects of basic and applied energy and environmental research; in reservoir characterization studies of large hydrocarbon fields; and expertise in carbonate sedimentology, stratigraphy, three-dimensional reservoir modeling, and analysis and interpretation of diverse sets of geological, seismic, and engineering data. He serves on a wide variety of boards, committees, and organizations. He served as a distinguished

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