Company lists · Data refreshed November 2026

Top 25 Seismic design engineering firms worldwide

Name: Seismic design engineering firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 18,928 companies tracked

RevenueBase identified 18,928 company matches for seismic design engineering firms worldwide as of November 2026 and tracks 220,926 professional contacts across them, including 82,917 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for seismic design engineering firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for seismic design engineering firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

18,928Companies

220,926Contacts tracked

82,917Verified emails

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The 25 largest seismic design engineering firms worldwide

Ranked by team size

Top 25 of 18,928 company matches for seismic design engineering firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Terracon	Exact match	Olathe, NE, United StatesHQ recorded Nov 6, 2026	5,001-10,000	6,576 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Thornton Tomasetti	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,382 contacts →
	Exact match “We apply scientific and engineering principles to solve the world’s challenges, starting with yours.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,363 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,116 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Freyssinet	Exact match	Rueil-malmaison, FranceHQ recorded Nov 6, 2026	5,001-10,000	1,611 contacts →
	Exact match “Founded over 70 years ago by Eugène Freyssinet, the inventor of prestressing, Freyssinet brings together an unrivalled range of skills in the specialist civil engineering sector…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Walter P Moore	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,446 contacts →
	Exact match “Welcome to Walter P Moore!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Simpson Gumpertz & Heger SGH	Exact match	Waltham, CA, United StatesHQ recorded Nov 6, 2026	501-1,000	969 contacts →
	Exact match “Simpson Gumpertz & Heger (SGH) is a national engineering firm committed to delivering holistic advice for our clients’ most complex challenges.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	M. N. Dastur & Co. P LTD	Exact match	Kolkata, IndiaHQ recorded Nov 6, 2026	1,001-5,000	941 contacts →
	Exact match “M.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Coffman Engineers	Exact match	Seattle, CO, United StatesHQ recorded Nov 6, 2026	501-1,000	919 contacts →
	Exact match “The right team is more than an advantage.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Wiss, Janney, Elstner Associates, INC	Exact match	Northbrook, IL, United StatesHQ recorded Nov 6, 2026	501-1,000	909 contacts →
	Exact match “Founded in 1956, Wiss, Janney, Elstner Associates (WJE) is an interdisciplinary firm of engineers, architects, and materials scientists committed to helping clients solve, repair…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Robert Bird Group	Exact match	Brisbane, AustraliaHQ recorded Nov 6, 2026	501-1,000	873 contacts →
	Exact match “Robert Bird Group (RBG), member of the Surbana Jurong Group, is a specialist structural, civil and construction engineering consultancy with over 800 employees across 12 offices…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Hesco Engineering Services	Exact match	Jeddah, Saudi ArabiaHQ recorded Nov 6, 2026	501-1,000	868 contacts →
	Exact match “Hesco is a design and engineering rm located in the Kingdom of Saudi Arabia with oces in Jeddah, Riyadh, Makkah, Syria, Turkey, Egypt, Spain and Lebanon.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	BGC Engineering INC	Exact match	Vancouver, BC, CanadaHQ recorded Nov 6, 2026	501-1,000	846 contacts →
	Exact match “BGC Engineering is an international consulting firm that provides professional services in applied earth sciences.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	RJC Engineers	Exact match	Vancouver, ON, CanadaHQ recorded Nov 6, 2026	501-1,000	822 contacts →
	Exact match “We are on a mission to futureproof North America.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	M3 Engineering & Technology Corp	Exact match	Tucson, AZ, United StatesHQ recorded Nov 6, 2026	501-1,000	802 contacts →
	Exact match “M3 is a privately held full service design firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Schnabel Engineering	Exact match	Glen Allen, VA, United StatesHQ recorded Nov 6, 2026	501-1,000	767 contacts →
	Exact match “Schnabel is a trusted partner in building the foundation for project success.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Smith Andersen	Exact match	Toronto, MB, CanadaHQ recorded Nov 6, 2026	501-1,000	730 contacts →
	Exact match “What does it take to be one of Canada’s most respected integrated engineering firms?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Goodwyn Mills Cawood GMC	Exact match	Montgomery, GA, United StatesHQ recorded Nov 6, 2026	501-1,000	700 contacts →
	Exact match “ENR Southeast 2024 Design Firm of the Year Goodwyn Mills Cawood (GMC) is one of the largest architecture and engineering firms in the Southeast.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Sondotécnica Engenharia	Exact match	Rio De Janeiro, BrazilHQ recorded Nov 6, 2026	201-500	696 contacts →
	Exact match “Sondotécnica was founded in 1954.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Whitman, Requardt And Associates, LLP	Exact match	Baltimore, FL, United StatesHQ recorded Nov 6, 2026	501-1,000	690 contacts →
	Exact match “Established in 1915, WRA is a nationally-recognized engineering, architectural and environmental planning firm with a reputation for delivering exceptional work on time and within…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Raba Kistner, INC	Exact match	San Antonio, UT, United StatesHQ recorded Nov 6, 2026	501-1,000	612 contacts →
	Exact match “Founded in 1968, Raba Kistner Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	NDY	Exact match	Melbourne, AustraliaHQ recorded Nov 6, 2026	501-1,000	606 contacts →
	Exact match “We provide engineering and advisory services for buildings and public spaces.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Nova Engineering And Environmental, LLC	Exact match	Kennesaw, FL, United StatesHQ recorded Nov 6, 2026	501-1,000	541 contacts →
	Exact match “Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Desimone Consulting Engineering	Exact match	New York, CA, United StatesHQ recorded Nov 6, 2026	501-1,000	540 contacts →
	Exact match “Founded in New York City in 1969, DeSimone provides structural engineering, façade and building envelope consulting, vertical transportation consulting, forensics, structural…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Thomas & Hutton	Exact match	Savannah, GA, United StatesHQ recorded Nov 6, 2026	501-1,000	535 contacts →
	Exact match “Our story began in 1946 with the collaboration of former US Army Corps of Engineers Officers, Hue Thomas and Joe Hutton, in their start-up engineering firm in Savannah, GA.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “seismic design engineering firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 18,928 seismic design engineering firms worldwide

See the full list, filter by size, metro and specialty, and access 82,917 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Seismic design engineering firms worldwide at a glance

As of Nov 6, 2026

37.5%Verified-email coverage

11.7Average contacts per company

1-10Median size (employees)

1.4%Largest-city concentration · Sao Paulo

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

11,151

11-50

5,879

51-200

1,337

201-500

217

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for seismic design engineering firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “seismic design engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 82,917 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Seismic design engineering firms by location

96 lists · largest first

Every Seismic design engineering firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “seismic design engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many seismic design engineering firms are there worldwide?

RevenueBase identified 18,928 company matches for seismic design engineering firms worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Terracon tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most seismic design engineering firms?

The United States leads with 4,659 companies, followed by Brazil (1,609) and Italy (1,072). Every seismic design engineering firms list by country and city is linked on this page.

Which city has the most seismic design engineering firms?

Sao Paulo leads with 258 company records, followed by New York (157) and London (141).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 82,917 professional contacts with verified work emails tracked across these 18,928 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.