Bill has over 39 years of experience in building design and construction, building science research, energy-efficiency, building enclosure durability and moisture-management, and building materials product development. He has specialized expertise in building enclosure design and detailing; design to resist natural hazards; and energy upgrades in historic buildings. He has participated in product development and marketing analysis work for major building material manufactures including CertainTeed, DuPont, Dow, Owens Corning, BASF and Georgia-Pacific. As Director of the Building Enclosure Services team at Steven Winter Associates, Bill has managed projects ranging from masonry restoration of landmarked buildings and deep-energy retrofits of historic properties to new construction Passive House residential towers. Mr. Zoeller occupies the Energy-Efficiency seat of the State of Connecticut Codes & Standards Committee and is a frequent speaker and trainer on cost-effective high-performance building at national conferences and educational workshops