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On April 25, 1965, the firm of Daniel Shapiro, Structural Engineer was formed. This small engineering company was headquartered in the Maybeck Building at 1736 Stockton Street in San Francisco. It was renamed Shapiro and Okino, Engineers when, in 1966, Harry Okino, C.E. joined as a partner. John Hom, S.E. joined the firm in 1970 as the third partner, thus establishing the firm as Shapiro, Okino, Hom and Associates, Engineers.


Over the next several years, the firm served the public and private sectors in and around the San Francisco Bay Area, providing seismic resistant design for new buildings, and seismic evaluation and rehabilitation design of existing buildings. Within a short time, the firm established a solid reputation within the community.

In 1987, the firm changed its name to SOH & Associates, Structural Engineers. The firm remained in the Maybeck Building for more than 25 years until it moved to Marathon Plaza in the early 1990s. In 1990, Frankie Lee was named President and Chief Executive Officer. In the ensuing years, the firm grew and diversified into broader services and project types, and added a Bridge & Transportation Division. In 1997, the firm became SOHA Engineers. Stephen Lau was promoted to President & CEO in April 2000, after being with the firm for more than 20 years, and brought SOHA much success while at their San Francisco office at 48 Colin P. Kelly Jr. Street, employing more than 30 engineering, technical, and administrative professionals.

At the start of 2022, SOHA's office relocated to 594 Howard Street, Suite 400 in downtown San Francisco with a secondary location at in Alameda County at 1670 Alvarado Street. Suite 3. Today, SOHA Engineers is led by Farshad Khodayari as President beginning January 2022 along with Gerard Madden and Larry Chambers who were promoted to Principals of the firm. With new leadership in place, SOHA Engineers continues the tradition of remaining at the forefront of state-of-the-art seismic design and rehabilitation and providing high quality structural engineering services.

Founded in 1965, SOHA Engineers is one of the leading structural engineering firms in California, with offices in San Francisco and San Leandro. SOHA professionals are dedicated to implementing and maintaining a creative and cost-effective approach to project delivery and award-winning structural design. For over five decades, SOHA has been providing a full spectrum of services, including seismic design of new buildings and structures, seismic evaluation and rehabilitation of existing structures and bridges, historical renovations, shoring and underpinning design, seismic evaluations and reports, plan checking, and peer review.

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