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100 Years Strong

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LERA 100 Year Anniversary 1923-2023 | Firm History

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Since our founding in Seattle in 1923, we have changed our name and moved our headquarters to New York City, but our drive for excellence and innovation in structural engineering has remained strong.  LERA is committed to pushing the envelope in the art and science of structural engineering for buildings and long span structures. In doing so we have participated in the development of new systems that have improved the way structures, large and small, are designed and constructed around the globe. Our innovations continue today, our research and development group streamlines ways to make our industry more efficient. 


LERA’s consistently strong team of pioneering thinkers have worked on a wide range of projects, creating sound, innovative structures that challenge the norm while ultimately answering to both aesthetics and function. LERA’s rich history of prominent high-rise buildings began with the World Trade Center in New York, continued with the Bank of China Tower in Hong Kong, and included the Shanghai World Financial Center in Shanghai, the Bitexco Financial Center in Ho Chi Minh City, and Lotte World Tower in Seoul and the Merdeka PNB 118 in Malyasian the second tallest building in the world set to open in 2023. We have designed structural systems for museums, schools, hospitals, airports, covic buildings, bridges and cultural centers globally, including the Miho Museum and Bridge in Japan, Puerta de Europa in Spain, Museum of Islamic Art in Qatar, Newseum in Washington, Rock ‘N’ Roll Hall of Fame and Museum in Cleveland, Clinton Presidential Library in Little Rock, and the Broad Museum in Los Angeles, CA.


Committed to the future, LERA is a leader in the SE2050 program, with a focus on the reduction of embodied carbon in the design and construction of structural systems by the collective structural engineering profession.

100 Years | 1923-2023

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At LERA Consulting Structural Engineers, we’ve been engineering structures for over 100 years. Our firm name has changed over the years while our commitment to excellence remains constant.

1923 | W.H. Witt 
1927 | W.H. Witt Company 
1955 | Worthington–Skilling 
1960 | Worthington, Skilling, Helle & Jackson 
1967 | Skilling, Helle, Christiansen, Robertson 
1983 | Robertson, Fowler Associates 
1985 | Leslie E. Robertson Associates 

2018 | LERA Consulting Structural Engineers

100 Years Collaboration


A Select Timeline of LERA's historical projects around the world 

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100 Years | History 1923-2023

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100 Years Strong |1923-2023

Retired Partners 

100 Years Expertise

100 Years Innovation

100 Years Vision

100 Years Leadership

100 Years Mentoring

100 Years Future

100 Years Legacy

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