Jason McLennan was named one of the top 40 under 40 most influential individuals in the design and construction field by Building Design&Construction magazine. He is the chief executive officer of the Cascadia Green Building Council, the Pacific Northwest's leading organization in the field of green building and sustainable development, and author of the Living Building Challenge, an international green building program. He is also cocreator of Pharos, the most advanced building material rating system in North America, and founder and chief executive officer of Ecotone Publishing, the only dedicated green building publisher in North America.McLennan is a former principal at BNIM Architects, one of the founders of the green design movement in the United States, where he worked on many of the leading high performance projects in the country, including LEED Platinum, Gold, and zero energy projects. At BNIM, he created the building science team known as Elements, which set new standards for energy and resource efficiency on many of its projects in various building types.McLennan's work in the sustainable design field has been published or reviewed in dozens of journals, magazines, conference proceedings, and books, including Architectural Record, the New York Times, and the Globe and Mail. He is author of The Philosophy of Sustainable Design, The Dumb Architect's Guide to Glazing Selection, and The Ecological Engineer. The Philosophy of Sustainable Design is currently used as a textbook in more than 60 universities and colleges and is distributed widely throughout Europe and North America.