Joseph joined the Company as a Director in June 1998.  He is a consultant to the American Chemical Society and other leading scientific organizations.  As Senior Science Advisor to the Under Secretary for Technology at the U.S. Department of Commerce from 1992 to 1996, he focused on international issues, chairing the 25-nation group of the Organization for Economic Cooperation and Development (OECD), which evaluates national technology policies and promotes innovation.  From 1983 to 1992, Dr. Clark was Deputy Director of the National Technical Information Service (NTIS), which he transformed into a customer-focused enterprise financed by worldwide sale of U.S. and foreign government reports, databases and on-line services.  His program of Total Quality Management (TQM) earned him the Senate Productivity Award.  From 1979 to 1983, Dr. Clark served in the White House Office of Science & Technology Policy under Presidents Carter and Reagan and was instrumental in passage of legislation and issuance of Executive Orders improving industry access to governmental patents, technical information and technology.  From 1970 to 1979, he directed R&D programs in fire protection technology and flammable fabrics at the National Bureau of Standards, now the National Institute for Standards & Technology.  He led the formation of the U.S. Fire Administration and then served as its Associate Administrator for Research & Planning.  His teams developed national standards for flammability of clothing and furnishings, and developed and evaluated new technologies for smoke detectors and sprinklers; the resulting innovations are credited with saving more than 100,000 lives.  Before entering government service, Dr. Clark was with Chemical Manufacturers Association and W.R. Grace & Company.  His laboratory research and statistical models have been used by industry to predict the life of polymers used in plastics and coatings.  He holds a B.S. and M.S. in Chemistry from Villanova University, and a Ph.D. from the University of Windsor (Canada) in Polymer Chemistry.  Dr. Clark has been Visiting Professor of Engineering at Princeton University.