Daniel J. Lemieux

Principal and Director of International Development


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 both locally and nationally for design and restoration excellence. In October 2005, Mr. Lemieux assumed management responsibility for the Washington, D.C. office of WJE, responsible for the continued development and expansion of that practice until January 2016, when he joined the International Operations group as Director, responsible for advancing our global practice in architecture and building science.

As a building enclosure specialist, Mr. Lemieux has authored, coauthored, and served as technical editor for the National Institute of Building Sciences (NIBS) during its initial development of the web-based Whole Building Design Guide and NIBS Guideline 3: Exterior Enclosure Technical Requirements for the Commissioning Process. He currently serves as vice chair of ASTM Committee E06, Performance of Buildings; chair of ASTM Subcommittee E06.55, Performance of Building Enclosures, and is founding chair and a primary author of ASTM E2813, Standard Practice for Building Enclosure Commissioning (BECx). As ASTM chair, Mr. Lemieux worked closely with colleagues from WJE and peer-level practicing and teaching professionals from across the U.S. and Canada to support the development of ASTM E2813, ASTM E2947 and ASHRAE Standard 202, together with the establishment of an agreement between ASTM and NIBS to work together to advance our understanding of building science and the physics of building enclosure and whole-building performance. He has chaired multiple workshops and symposia on Building Science in the U.S., Canada and the UK and introduced BECx to audiences in the UAE.  

In 2011–2012, Mr. Lemieux supported our post-earthquake assessment and repair design for the Washington Monument and Washington National Cathedral, serving as Architect-of-Record and technical liaison to the U.S. NPS for the Monument.


Facade Assessment and Consulting

  • Multiple Properties - UK and EU: Exterior cladding and fire protection
  • 135 Bishopsgate - London, UK: Thin stone granite veneer on strong-back steel framing, glazed aluminum curtain wall, sloped glazing, low-slope roofing, and waterproofing
  • 1 Finsbury Avenue - London, UK: Grade 2 Listed patented curtain wall (J.A. Gartner)
  • Opus Tower - Dubai, UAE: Silicone structurally glazed cold-bent insulating glass
  • Al Maryah Central - Abu Dhabi, UAE: Point-supported glass, ACP and GFRC
  • DIFC Gate Building - Dubai, UAE: Thin stone veneer in open-jointed rainscreen facade
  • FIFC Financial Center - Mumbai, India: Silicone structurally glazed curtain wall
  • Multiple properties - U.S.: Technical peer review and QA services for silicone structurally glazed curtain wall supplied from China


Failure Investigation

  • Multiple Properties - US: In-service migration of gray polyisobutylene sealant in planar and cold-bent insulating glass units
  • U.S. Federal Courthouse - Western District of New York: Condensation potential in a cold climate, architectural precast concrete   
  • Square 54, Washington, D.C.: Optical distortion and birefringence in glass
  • Philip Merrill Environmental Center, Annapolis, MD: In-service deterioration of engineered wood structure and sheathing
  • Richmond City Hall - Richmond, VA: In-service strength loss in exterior thin-stone marble veneer


Design Peer Review

  • U.S. General Services Administration Design Excellence Team:  Peer review of point-supported and silicone structurally glazed curtain wall for U.S. federal courthouses


Historic Preservation

  • Washington Monument - Washington, D.C.: Post-earthquake assessment, temporary stabilization, and repair design
  • Washington National Cathedral - Washington, D.C.: Post-earthquake assessment, temporary stabilization and repair design
Professional Affiliations

American Institute of Architects (AIA)
Royal Institute of British Architects (RIBA)
Royal Institute of Chartered Surveyors (RICS)
Center for Window and Cladding Technology, (CWCT)
ASTM International


Architect: United States; United Kingdom; Canada (Ontario), Australia (New South Wales)
NCARB (US): Washington, DC; Maryland; Virginia; New York; Florida; Georgia
RIBA (UK): Architect
MRICS (UK): Building Control


Georgia Institute of Technology
Bachelor of Science, Architecture, 1988