Company lists · Data refreshed September 2026
Top 25 Seismic retrofit companies based in the United States
RevenueBase identified 265 seismic retrofit companies headquartered in the United States as of September 2026 and tracks 2,179 professional contacts across them, including 898 with verified work emails. San Francisco is the largest hub.
This list covers seismic retrofit companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 22, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest seismic retrofit companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 122 contacts → | ||||
Indirect evidence “Since 1974, ZFA Structural Engineers (ZFA) has collaborated with public and private clients to help build better structures.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 63 contacts → | ||||
Indirect evidence “Since 1988, Fibrwrap Construction has specialized in FRP structural strengthening, concrete restoration and masonry restoration.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 59 contacts → | ||||
Indirect evidence “PARADIGM Structural Engineers, Inc, with offices in San Francisco, Chicago, Dallas, and Arlington (Q1 2027), specializes in the structural design of new buildings and the…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 54 contacts → | ||||
Indirect evidence “Stanley D.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 51 contacts → | ||||
Indirect evidence “Established in 1960, Forell Elsesser is a structural engineering innovator.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 50 contacts → | ||||
Indirect evidence “For over 30 years, Alpha Structural, Inc.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 49 contacts → | ||||
Indirect evidence “At Nabih Youssef Associates Structural Engineers (NYA), we apply the world’s most advanced structural engineering approaches to deliver resilient, efficient, and future-ready…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 43 contacts → | ||||
Indirect evidence “At BASE, we’ve built a reputation as a structural engineering firm that dramatically lowers project risk.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 38 contacts → | ||||
Indirect evidence “WE SEAMLESSLY INTEGRATE YOUR VISION INTO EVERYDAY LIFE From the classrooms where we study and the hospitals that keep us healthy to the museums and zoos where we create family…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 33 contacts → | ||||
Strong evidence “Structural Engineer Services for New Structural Design, Remodels and Additions, Seismic Studies and Retrofit, Building Assessments and Residential.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 33 contacts → | ||||
Indirect evidence “Founded in 2001, Tyndall Engineering and Design, P.A.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 32 contacts → | ||||
Indirect evidence “SKS Construction is a full-service design, engineering and construction company founded in 1987 in the City of Los Angeles, California by Sol K Shaolian (MS PE).” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 28 contacts → | ||||
Indirect evidence “Earth Mechanics, Inc.(EMI) is a Geotechnical and Earthquake Engineering company based out of 17800 Newhope Street, Suite B, Fountain Valley, California, United States.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 28 contacts → | ||||
Indirect evidence “With locations in San Francisco and San Luis Obispo, FTF Engineering is guided by the belief that success comes from providing our clients with creative, thoughtful structural and…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 28 contacts → | ||||
Indirect evidence “TITAN ENGINEERS PC is a Professional Structural and Consulting Engineering Corporation headquartered centrally within the New York Metropolitan Area in Union, New Jersey.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 26 contacts → | ||||
Indirect evidence “Based in the Indianapolis area, CE Solutions provides structural engineering services in an efficient and effective manner while accomplishing our clients’ goals in innovative…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 24 contacts → | ||||
Indirect evidence “We at R.J.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 23 contacts → | ||||
Partial evidence “Since 1984, the team at Optimum Seismic, Inc.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 23 contacts → | ||||
Strong evidence “CWS Construction Group Inc is a Novato, CA based Public Works Company specializing in Modernizations, Tenant Improvements, and Seismic Retrofits.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 23 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 22 contacts → | ||||
Indirect evidence “Quantum Consulting Engineers offers structural engineering services for new and existing buildings, including new construction, tenant improvements, renovation, and historic…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 22 contacts → | ||||
Indirect evidence “TGRWA, LLC is a Structural Engineering firm in Chicago, Illinois specializing in new construction and renovation of building structures.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 22 contacts → | ||||
Indirect evidence “Kline Engineering & Consulting, LLC (KLINE) is a leading consulting structural engineering firm providing quality services to clients since 2006.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 20 contacts → | ||||
Partial evidence “We are engineers, seismologists, and geologists working together to offer the latest techniques in geoengineering, geotechnical, and earth sciences consulting.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 20 contacts → | ||||
Indirect evidence “Peak Engineering is a Denver metro area consulting firm with over 25 years of national structural engineering experience with a wide range of project types using multiple building…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: seismic retrofit companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names seismic retrofit companies.
- Partial evidence
- Its own public description names part of seismic retrofit companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name seismic retrofit companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 265 seismic retrofit companies based in the United States
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Seismic retrofit companies based in the United States at a glance
As of Sep 22, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 265 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among seismic retrofit companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “seismic retrofit companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names seismic retrofit companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among seismic retrofit companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 898 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 22, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Seismic retrofit companies by metro
- Seismic retrofit companies in San Francisco26
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names seismic retrofit companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many seismic retrofit companies are there based in the United States?
RevenueBase identified 265 seismic retrofit companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
ZFA Structural Engineers, headquartered in Santa Rosa, tops this list with the largest team on record.
Which city has the most seismic retrofit companies?
San Francisco leads with 26 headquartered companies, followed by Los Angeles (23) and Oakland (8).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 898 verified decision-maker contacts tracked across these 265 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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