Heriberto Cabezas joined the National Risk Management Research Laboratory (NRMRL) of the Office of Research and Development at the U.S. Environmental Protection Agency in October 1994.  At NRMRL he is the Chief of the Sustainable Environments Branch, a multidisciplinary research group of approximately twenty scientists and engineers, fifteen at the doctoral level.  Dr. Cabezas served as Chair of the Environmental Division at the American Institute of Chemical Engineers for 2006.  Dr. Cabezas was the recipient of the Sustainable Technology Division 1997 Individual Achievement Award, the 1998 EPA Science Achievement Award in Engineering presented jointly with The National Society of Professional Engineers, and the 2003 Diversity Leadership Award from the Office of Research and Development at the U.S. Environmental Protection Agency.  He is listed in Marquis' Who's Who in the World, 18^th Edition, 2001; Marquis= Who=s Who in Science and Engineering, 5^th Edition; and Who's Who in America, 60^th Edition, 2006, and various other biographical references.  Dr. Cabezas received his Ph.D. in chemical engineering from the University of Florida in 1985 in the areas of thermodynamics, statistical mechanics, and chemical physics.  He also holds a M.S. in chemical engineering from the University of Florida (1981) and a B.S. in chemical engineering (magna cum laude) from the New Jersey Institute of Technology (1980).  His principal area of research is the sustainable management of complex environmental systems.  Specific projects include watershed scale and regional scale efforts along with theoretical exploration of the underlying scientific principles of sustainability.  The principal watershed scale project involves the use of economic incentives to manage storm water runoff so as to improve aquatic ecology, water quality and hydrology using the Shepherd Creek watershed in Cincinnati, Ohio as test case.  The main regional scale project involves the use of scientifically-based sustainability metrics to guide environmental management action using the San LuisBasin in Colorado as a test case.  The main thrust of the theoretical explorations center on the application of Information Theory and the concept of dynamic order to environmental management. His publications include over forty peer-reviewed technical publications, many conference proceedings, Guest editorship of the Journal of Chromatography and the journal Resources, Conservation, and Recycling, and various trade publications.  He has also given numerous invited lectures at national and international conferences, presentations at national and international conferences, and invited research seminars at academic, private, and government institutions.  Dr. Cabezas is a member of the American Institute of Chemical Engineers and the American Association for the Advancement of Science.  Dr. Cabezas is a U.S. Navy veteran of the Vietnam Conflict.