Daniel J. Lemieux

Since joining WJE in 1996, Daniel Lemieux has successfully completed hundreds of projects in the area of building enclosure failure investigation, repair design, and architectural rehabilitation, including projects that have been recognized nationally for design and restoration excellence. As the firm’s Director of International Development, he is responsible for advancing WJE’s global architecture and building science practices. Prior to that, Dan served as Managing Principal of WJE’s Washington, D.C. office from 2006 to 2016. Dan currently serves on multiple ASTM International committees including vice chair of E06, Performance of Buildings and chair of E06.55, Performance of Building Enclosures. He is founding chair and a primary author of ASTM E2813, Standard Practice for Building Enclosure Commissioning (BECx) and worked closely with WJE colleagues and practicing and teaching professionals from across North America to support the development of ASTM E2813, ASTM E2947 Standard Guide for BECx and ASHRAE Standard 202 Commissioning Process for Buildings and Systems. He served as an author and technical editor for the National Institute of Building Sciences (NIBS) web-based Whole Building Design Guide and NIBS Guideline 3: Exterior Enclosure Technical Requirements for the Commissioning Process. Dan was elected to the AIA College of Fellows in 2021 for his work in building science and the physics of building enclosure and whole building performance. He has authored, co-authored, presented and chaired workshops and symposia on that topic in North America and internationally and served as co-chair of the 2017 Symposium on Building Science and Conservation at Southbank Centre, London.