Engineering excellence for structures and enclosures.Boston University Duan Family Center for Computing and Data Sciences Building expertise for over 60 years.John Hancock Sign Installation at 200 Berkeley Innovation for a changing world.Northeastern University ISEC Solving the toughest building challenges.Hub On Causeway Engineering for elegance.Cleveland Clinic Taussig Cancer Center A holistic approach to sustainable construction.Norwell Public Library Projects About Latest News 10.17.25 Beyond the Skin: Why Building Enclosures Matter in Healthcare Facilities by Rafik Armanios 10.13.25 LeMessurier Expands Enclosure Consulting Services 10.10.25 Attending & Moderating the 2025 Wagdy Anis Symposium on Building Science 10.01.25 LeMessurier Opens New Office in Historic Philadelphia Featured Project 200 Berkeley Street, John Hancock Signage