Thornton Tomasetti, founded in 1956, is a global provider of scientific, structural, and construction engineering services. The firm’s core mission is to apply scientific and engineering principles to solve the world’s challenges, particularly in the built environment. Their services include design, investigations and analysis, structural and construction engineering, renewal, and property loss consulting. Thornton Tomasetti focuses on addressing climate change, reducing embodied carbon, and promoting sustainable building practices.

Notable affiliated people include co-founder Lev Zetlin and current leadership who continue to drive innovation in engineering. Key investors are not publicly disclosed. Thornton Tomasetti has achieved significant milestones such as pioneering the use of mass timber as a mainstream structural system and implementing holistic strategies for climate change mitigation. Their impact is evident in their contributions to safer, more sustainable buildings worldwide.