Here's How
We apply scientific and engineering principles to solve the world’s challenges — starting with yours. Whether we’re focusing on the design, construction and performance of buildings or expanding into new disciplines, we never limit ourselves, applying our expertise to all types of projects across a range of industries.

Year Founded
1949
Offices Worldwide
40+
Projects
90,000+
Countries Worked In
150+
Languages Spoken
50+
LEED Professionals
215+
What We Do
Whatever issue you face, we have your solution. We get to the heart of every problem—digging deep to understand its intricacies and nuances, so we can help you achieve your goals, together.
Our Work
We are conquering complex problems - on six continents - and finding better ways to tackle even the most straightforward undertakings.
Recent News & Insight
Astra Tower Opens
May 23, 2025
Not just the tallest building in Utah, the 41-story Astra Tower also boasts distinctive features such as an air quality beacon and the state’s largest mural. It officially opened last week in Salt Lake City.
Construction Underway On Karuruma Trail Bridge
May 22, 2025
Thornton Tomasetti volunteers are heading to Rwanda to help complete a 60-meter suspended bridge that will provide safe, year-round access for over 8,600 residents in two rural communities.
Mahan Named To ENR's National Top 20 Under 40
May 22, 2025
Congratulations to Associate Jennifer Mahan on being named one of Engineering News-Record’s National Top 20 Under 40 for 2025.
Structural Observations in Bangkok Following the Myanmar Earthquake
May 18, 2025
Our Forensics team conducted a four-day non-intrusive survey to assess potential structural impacts and evaluate how buildings and critical infrastructure performed under seismic stress following the magnitude 7.7 in Myanmar this past March.
Civil Engineering Source: Innovative Approach Helps Atlanta Airport Grow With The Times
May 14, 2025
The world’s busiest airport is growing. The new Concourse D at Hartsfield-Jackson Atlanta International Airport will be 75% larger and able to accommodate 1,000 more passengers at any given time.