HEADLINE: Obituary; Paul L. Busch, at 61, engineer, consultant Paul L. Busch of Wilton, Conn., president and CEO of Malcolm Pirnie Inc., which has offices in Boston, died Tuesday in Boston, after complications of Hodgkin's disease. He was 61. Dr. Busch earned undergraduate and master's degrees from the Massachusetts Institute of Technology and a doctorate degree from Harvard, all in engineering. He spent his entire 38-year career at Malcolm Pirnie. He was named vice president of Malcolm Pirnie Inc. in 1970, elected president in 1988, and CEO in 1990. A leading authority on the management and treatment of industrial and toxic wastes, as well as a consultant to governments around the world, Dr. Busch was personally involved in providing clean drinking water to San Francisco, Boston, New York, Detroit, Cleveland, Cincinnati, the Kingdom of Jordan and Egypt. He was involved in research and design projects in municipal and industrial wastewater treatment processes, drinking water and toxic waste technologies. His extensive work helped establish Pirnie in these fields. Dr. Busch received many professional honors. He was elected to the National Academy of Engineering in 1996, served on the National Research Council's Water Science and Technology Board, and was a member of the U.S. EPA National Advisory Council for Environmental Policy and Technology. He was past president of the American Academy of Environmental Engineers and chairman of the board of the Water Environment Research Foundation. He served as visiting professor, adviser and mentor at more than two dozen universities, including Harvard University. He was instrumental in creating the Malcolm Pirnie-United Negro College Fund Scholars Program, now in its third year. Dr. Busch is survived by his wife, Iris of Wilton; two sons, Dr. Jordan Busch of Boston and Jeffrey of New York City; a daughter, Lisa of Sitka, Alaska; and three grandchildren. A memorial service will be held at 10:30 a.m. today at Temple B'Nai Chaim in Georgetown, Conn. Cremation was private. Copyright 1999 Boston Herald Inc.