Bill is the president emeritus of his firm, Turner Building Science and Design, LLC., in Harrison, ME. He received his B.S. and M.S. in Engineering from Northeastern University and served for ten years on the research staff of Harvard University School of Public Health. During that time he conducted longitudinal air quality studies inside and outside of homes in six cities, evaluating particles, VOCs, and gasses associated with combustion and other sources. Since then, Bill has focused on building science, sustainability, and resilience issues, including energy use, indoor air quality, moisture, building shell design, net zero buildings, building commissioning, and forensic air quality evaluations. His experience includes rebuilding existing homes and other buildings and designing new buildings. He has published and lectured extensively.