Energy Code Champion - David Weitz

Much of the success of advancing and promoting energy code adoption and implementation can be attributed to tireless work behind the scenes by people like our Energy Code Champions. For more than 20 years, David Weitz has contributed smart thought and energy efficiency leadership to developing technical best practices for building code design and building science. 

David is currently the Director of Applied Building Science at Conservation Services Group (CSG), where he has served since 2006. At CSG, he provides key oversight on new codes assistance projects in Massachusetts and Rhode Island. His team’s focus includes building material and installation guidelines, QA/QC processes and inspection protocols, and overseeing technical development and technology acquisition. He also provides leadership on building science issues and the development and incorporation of new techniques, services and technologies into energy efficiency programs. These efforts enabled delivery of 20,000+ effective site inspections by Conservation Services Group in 2013 alone. (For more information about the 30-year-old nonprofit company, see

Prior to his director role, David led the energy code upgrade effort for the Massachusetts Board of Building Regulations in their transition to national model codes, and was the Executive Director of the Building Codes Assistance Project (BCAP). David also served as the first chairman of the Building Performance Institute (BPI) Standards Management Board, helping BPI to professionalize standards development efforts as an ANSI-accredited organization.

With a mission to improve technical building standards, David has devoted much of his career to the design and enforcement of energy code requirements. And he never forgets being a thoughtful manager to his team wherever he goes, inspiring loyalty and encouraging dedication to the energy efficiency cause. BCAP commends David for his tireless involvement in emerging technologies and energy modeling and for continuously seeking new ways to improve energy efficiency programs, finding deeper energy savings and supporting Home Performance industry growth.


For each bi-monthly issued newsletter, the BCAP Energy Code Champion recognizes someone who has been working hard behind the scenes to support for improving building energy codes and policy. By recognizing these committed contributors, we want to help in amplifying their voice and increasing their sphere of influence. If you would like to nominate someone, please send their name, organization, and a few sentences on their work promoting and advancing energy codes to Seul Rhee at

See the full list of BCAP Energy Code Champions


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