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Washington
1330 Connecticut Avenue, NW
Suite 300
Washington, DC 20036
United States
Phone: +1.202.580.6300
Fax: +1.202.580.6301
Our Team
Featured Washington Projects
Related Projects
Featured Project
Social Security Administration National Support Center For facilities with a critical mission, security is paramount. With expertise in structural engineering and protective design, we make sure they’re safe.
Featured Project
Capital One Hall Careful design and collaboration brought everything into harmony for this high-end theater and events center.Additional Projects
Washington News
2023 Hurricane Season Recap
December 19, 2023
The 2023 Atlantic Hurricane season was one of the busiest on record, yet most storms didn’t even make landfall.
How Hurricanes Have Influenced Building Codes
November 16, 2023
Building codes set requirements related to design and construction, and major hurricanes have influenced state and local codes over the years.
Emergency Preparedness
October 12, 2023
Emergency planning and preparedness may often come as an afterthought, but it is crucial to take a proactive approach that incorporates operations and maintenance considerations into early project stages.
Hurricane Season 2023: Mid-Season Check In
October 02, 2023
The 2023 hurricane season has reached its midpoint; we take a look at how predictions have evolved and the impacts of the storms to date.
Climate Action – Engineers and Scientists Have the Solution
September 20, 2023
A two-pronged approach of decarbonization and resilience can help combat climate change while dealing with today’s shocks and stresses more effectively.
Hurricane Hilary Could Bring Rain, Flooding to Southwest US
August 18, 2023
Hurricane Hilary has strengthened to Category 4 and is predicted to impact Southern California as a tropical storm over the weekend, potentially bringing heavy rainfall that may lead to extensive flooding.
Rapid Assessment Approach
August 16, 2023
For specific geographic locations, hurricanes are a near certainty—it’s a matter of when, not if. Our firm has extensive experience helping clients both plan for the inevitable and execute a rapid assessment approach in the aftermath of a storm.
Modern Steel Construction: Top to Bottom
August 15, 2023
Detroit's newly constructed Exchange building stands out in its neighborhood: It’s the first project in the U.S. to be built using the LIFTbuild delivery method.
Flood Resilience for Hurricanes
July 10, 2023
Climate change brings rising water levels, rendering many structures vulnerable to potential flooding. In fact, scientists have predicted that global sea levels could rise by as much as 12 inches by 2050. Add hurricanes to the mix, and it’s more important than ever for owners to establish flood resilience strategies ahead of a storm.
10th Annual Corporate Responsibility Report
June 27, 2023
Whether it’s making the built environment more sustainable, creating healthier and more diverse workplaces, supporting good works and our employees’ passion for community service, we strive to improve the world.
Preparing for Hurricane Season 2023
June 01, 2023
As we approach the start of the 2023 Atlantic hurricane season, let’s take a look back at the 2022 season, as well as the developing El Niño, and learn what this means for the season to come.
Play Ball!
March 30, 2023
It’s spring and that means baseball is back! At ballparks everywhere ground crews are prepping the turf and chalking the baselines as coaches finalize their starting lineups.
ENR: With Exchange, LIFTbuild Delivering First Top-Down Project in the US Since the '70s
October 28, 2022
When each of the 500-ton, 11,000-sq-ft floorplates are ready to be lifted, they’re raised by eight strand jacks, with a capacity of about 200 tons apiece, staged on the ground with pulley systems at the top.
INWED 2022 – A Conversation with Diana Sagastume
August 23, 2022
To honor women engineers at Thornton Tomasetti, W@TT's Global Programming Committee is sharing stories about remarkable women, such as Diana Sagastume.
Modern Steel Construction: Center Stage
August 05, 2022
With its striking sawtooth marble and glass façade, sprawling public rooftop park and column-free theater with cantilevered balconies, Capital One Hall puts on a show of its own.
2022 Executive Promotions
August 05, 2022
Congratulations to the following talented individuals as they take on increased responsibilities and new challenges.
INWED 2022 – A Conversation with Colleen Harper
July 07, 2022
To honor women engineers at Thornton Tomasetti, W@TT's Global Programming Committee is sharing stories about remarkable women, such as Colleen Harper.
Trust & Partnership: MWBE as It Should Be
June 20, 2022
Our Washington, D.C., office has partnered with small, woman-owned structural firm A+F Engineers on more than 12 projects over 17 years. Representatives of both recently sat down to discuss their experience together.
Exchange Tops Out in Downtown Detroit
May 10, 2022
Exchange Detroit has given “raise the roof” a whole new meaning.
ENR: Amazon HQ2 Puts Concrete on an Embodied Carbon Diet
December 23, 2021
"The MetPark team also is doing 'even more' regarding large-scale green buildings, thanks to a groundbreaking focus on sustainability that could become a model for others."
BD&C: Hub For A Company And - Maybe - A City
November 09, 2021
With its mix of uses – three performance spaces, a rooftop park open to the public, conference and classrooms, and balconied atrium – Capital One Hall is a center for corporate use, community arts, education, civic events and more.
Building Bridges: Jen Greenawalt Shapes the Coolest Projects
June 17, 2021
Sometimes getting to shape the coolest projects is itself a cool project, as Washington, D.C., Project Engineer Jennifer Greenawalt learned at an early age.
Abruzzo, Malsch & Van Eepoel Elected to Board of Directors
May 24, 2021
Thornton Tomasetti announces that Managing Principal John Abruzzo, P.E., S.E., and Senior Principals Elisabeth Malsch, Ph.D., P.E., and Peggy Van Eepoel, P.E., F.SEI have been elected to the firm’s board of directors for two-year terms.
2020 Embodied Carbon Showcase: Delivering Resilience to Metropolitan Park
May 09, 2021
As the structural engineer for Metropolitan Park, the first phase of Amazon’s second headquarters, we were tasked with making major reductions in the project’s embodied carbon.
2020 Showcase: Responding to the Pandemic
May 09, 2021
When COVID-19 cases surged in the spring of 2020, and again last winter, our engineers, scientists and programmers lent a hand. Here are a few of the ways we helped our clients and communities meet some immediate challenges.
2019 Green Offices Update
July 27, 2020
In 2019, 87 employees – representing all but our smallest offices – served as local corporate responsibility advocates.
2019 Lifestyle-Friendly Workplace Update
July 26, 2020
In 2019, we continued the regular offerings of our wellness program and added more ways to promote good health.
Supporting the COVID-19 Response Effort
May 11, 2020
As communities around the world battle the coronavirus pandemic, our teams are lending a hand.