Science and Technology Policy. She also previously was associate director of the Water Science and Technology Board, a unit of the National Research Council of the National Academy of Sciences. In those previous positions, she led a range of studies including assessment of options for improving potable water service to small U.S. communities, evaluation of regulatory requirements for the remediation of contaminated groundwater, assessment of research priorities for new environmental remediation technologies, evaluation of research on alternative methods for detecting and cleaning up landmines, and evaluation of risk assessment methods for sites contaminated with unexploded military ordnance. She has given briefings on these and other topics to a variety of federal officials, members of Congress and their staffs, and institutional advisory boards. Dr. MacDonald Gibson earned an M.S. degree from the Department of Civil and Environmental Engineering at the University of Illinois, Urbana-Champaign, and a B.A. in mathematics from Bryn Mawr College.

Jeffrey J. Siirola (NAE) is currently retired from the Eastman Chemical Company where he was a technology fellow in Eastman Research in Kingsport, Tennessee. His areas of interest include chemical process synthesis, computer-aided conceptual process engineering, engineering design theory and methodology, chemical process development and technology assessment, resource conservation and recovery, sustainable development and growth, artificial intelligence, nonnumeric computer programming, and chemical engineering education. Dr. Siirola is secretary and a member of the Board of Directors of the Accreditation Board for Engineering and Technology. He is also a trustee and past president of CACHE (Computer Aids for Chemical Engineering Education), and a member of the American Chemical Society, the American Association for Artificial Intelligence, and the American Society for Engineering Education. He has served on numerous National Science Foundation and National Research Council panels, and on the advisory boards of several journals and chemical engineering departments. Dr. Siirola is a member of the National Academy of Engineering and was the 2005 president of the American Institute of Chemical Engineers. He received a B.S. in chemical engineering from University of Utah in 1967 and a Ph.D. in chemical engineering from the University of Wisconsin-Madison in 1970.

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