Klaus W. Koenig, Dipl.-Eng., was born in 1956 and works as a freelance architect and consulting engineer in Ueberlingen on Lake Constance in Germany. He has participated in numerous projects in the areas of building construction and modernization, ecological construction techniques and healthy living spaces.

He is a recognized expert in the field of rainwater utilization for 20 years. He is the author of several books in German on this subject. His first English book on rainwater recycling, “The Rainwater Technology Handbook: Rain Harvesting in Building,“ was published in 2001, the Korean version in 2005. He is a regular contributor of articles and reports to professional journals.

Klaus Koenig has lectured on the subject at International Symposia of the United Nations in Japan and Korea. He has been a trainer in design charrettes hosted by the Chinese Academy of Science and by the Canadian Government.

Since 1997, he has been a member of the German DIN-NAW V8 Committee for standardizing rainwater utilization installations.

As a member of the Board of fbr, the German national professional association for water recycling and rainwater utilization, located in Darmstadt, Germany, he holds regular seminars to educate architects, specialty engineers, tradesmen and public service employees about water issues and solutions.