David has more than 15 years’ experience analyzing the performance of buildings, from single-family homes to sports stadiums. He is an advanced user of both the eQUEST and EnergyPlus whole building energy simulation software, and a lead developer of CBECC-Com, an open-source software for California T24 compliance analysis. He is also well-versed in utility/degree-day regression modeling and other methods for evaluating building utility consumption. His breadth of experience includes using these models to evaluate and optimize building efficiency strategies, complete measurement and verification studies, and document compliance with energy codes and green building certifications, such as LEED®. David is passionate about helping clients make informed decisions on efficiency measures, providing unbiased recommendations for reducing costs while meeting sustainability goals, and expanding the use of actual performance data to inform the building modeling process.