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R&D and technology play an essential role in our firm. We invest in constant learning, testing and innovation. That uniquely positions us to solve our clients’ most difficult problems.
Innovation Engine Our CORE groups manage our research and development efforts, from incremental efficiency improvements to solving some of the most challenging engineering problems of our time. Learn More
Innovation Output We believe collaboration amplifies our innovation potential and creates connections that lead to better, more imaginative solutions for our clients. Learn More
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San Francisco

235 Montgomery Street
Suite 1050
San Francisco, CA 94104
United States
Phone: +1.415.365.6900
Fax: +1.415.365.6901
 

✔ How we can help with San Francisco's façade ordinance

✔ How we can help with the new CALGreen construction regulations
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The Golden 1 Center in Sacramento, California. Courtesy AECOM
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Uber Technologies Headquarters in San Francisco. © SHoP Architects PC
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160 Folsom Street San Francisco. Thornton Tomasetti
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Silver Oak Alexander Valley in Healdsburg, California. Damion Hamilton photo
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Oracle Park in San Francisco. Jcookfisher/Flickr
Valley Health Center in San Jose, California.
Valley Health Center in San Jose, California. Thornton Tomasetti

Our Team

shen
Brian Shen
Principal & San Francisco Office Director
bshen@thorntontomasetti.com +1.415.365.6942 San Francisco Click to Download CV
curtis
Theresa Curtis
Senior Principal & West Region Leader
tcurtis@thorntontomasetti.com +1.415.365.6928 San Francisco
Gary Panariello
Gary Panariello
Managing Director
GPanariello@thorntontomasetti.com +1.415.365.6900 San Francisco Click to Download CV
abruzzo
John Abruzzo
Managing Principal
jabruzzo@thorntontomasetti.com +1.415.365.6930 San Francisco Click to Download CV
Ally, Hassan 1
Hassan Ally
Senior Principal
HAlly@ThorntonTomasetti.com +1.415.365.6900 San Francisco
Jeremy Erickson
Jeremy Erickson
Business Development Director
jerickson@thorntontomasetti.com +1.415.369.6954 San Francisco
koenigs
Mark Koenigs
Associate Principal
mkoenigs@thorntontomasetti.com +1.415.365.6902 San Francisco
ratchye
Steve Ratchye
Associate Principal
sratchye@thorntontomasetti.com +1.415.365.6968 San Francisco

Featured San Francisco Projects

Arecibo Radio Telescope
After the radio telescope in Arecibo, Puerto Rico, collapsed, we used drones to assess the safety of the site and investigate the damage.
After the radio telescope in Arecibo, Puerto Rico, collapsed, we used drones to assess the safety of the site and investigate the damage. Thornton Tomasetti

Related Projects

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San Francisco News

Post-Wildfire Structural Damage to Concrete & CMU Foundations

Insight

Structural Damage to Concrete & CMU Foundations
March 12, 2026
After the 2025 Eaton Fire in California, many foundations remained standing but were structurally compromised. This forensic case study explains how wildfire heat can affect concrete and CMU systems.
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News

Fire Damage to a School’s Cladding & Rooftop MEP
January 14, 2026
A forensic case study of a new constructed school shows how the Eaton Fire caused limited, localized roofing and rooftop system damage—and why distinguishing wildfire impacts from construction deficiencies matters for recovery and insurance decisions.
The question for owners isn’t whether electrification matters – it’s how to plan the transition in a way that works for residents, budgets and building systems.

News

Decarbonization Road Maps for Cities
November 25, 2025
Thornton Tomasetti’s decarbonization and resilience specialists are providing program implementation and technical assistance to city agencies in San Francisco and Boston to help building owners develop and implement decarbonization road maps.
Ping An Finance Center, South Tower in Shenzhen, Guangdong, China. Courtesy Ping An

Insight

Why Implement Performance-Based Seismic Design?
August 04, 2025
For projects of unconventional size, shape, structural system or function that are in high-seismic areas, meeting standard building codes alone may not always make sense. Performance-based seismic design (PBSD) can provide a better approach.
Astra Tower Opens

News

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.
ARECIBO TELESCOPE COLLAPSE FORENSIC REPORT

News

Arecibo Collapse Forensic Report Released
August 11, 2022
It took just seconds for the 900-ton instrument platform at the Arecibo Observatory in Puerto Rico to come crashing down into the 305-meter-wide dish, destroying the iconic radio telescope.
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