Company lists · Data refreshed September 2026

Top 25 Seismic retrofit consultants worldwide

Name: Seismic retrofit consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 11,858 companies tracked

RevenueBase identified 11,858 seismic retrofit consultants worldwide as of September 2026 and tracks 117,211 professional contacts across them, including 41,984 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers seismic retrofit consultants worldwide, 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 29, 2026. Country and city lists for seismic retrofit consultants follow the table.

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

11,858Companies

117,211Contacts tracked

41,984Verified emails

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The 25 largest seismic retrofit consultants worldwide

Ranked by team size

Top 25 of 11,858 seismic retrofit consultants worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to seismic retrofit consultants: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	ECS Group Of Companies	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,210 contacts →
	Indirect evidence “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Source: RevenueBase Database · checked Sep 29, 2026
2	Jensen Hughes	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,655 contacts →
	Indirect evidence “Worldwide, we are most recognized for our leadership in fire protection engineering, a tradition of responsibility we have advanced with pride since 1939.” Source: RevenueBase Database · checked Sep 29, 2026
3	Simpson Gumpertz & Heger SGH	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 29, 2026	501-1,000	942 contacts →
	Indirect evidence “Simpson Gumpertz & Heger (SGH) is a national engineering firm committed to delivering holistic advice for our clients’ most complex challenges.” Source: RevenueBase Database · checked Sep 29, 2026
4	Robert Bird Group	Partial evidence	Brisbane, AustraliaHQ checked Sep 29, 2026	501-1,000	872 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026
5	Coffman Engineers	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	501-1,000	859 contacts →
	Indirect evidence “The right team is more than an advantage.” Source: RevenueBase Database · checked Sep 29, 2026
6	Concrejato Engenharia	Partial evidence	São Paulo, BrazilHQ checked Sep 29, 2026	1,001-5,000	765 contacts →
	Partial evidence “Criada na década de 1970, a Concrejato é especializada na execução de serviços técnicos de retrofit e restauro de edificações, recuperação e reforço estrutural, obras industriais…” Source: RevenueBase Database · checked Sep 29, 2026
7	RJC Engineers	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 29, 2026	501-1,000	745 contacts →
	Indirect evidence “We are on a mission to futureproof North America.” Source: RevenueBase Database · checked Sep 29, 2026
8	Schnabel Engineering	Indirect evidence	Glen Allen, VA, United StatesHQ checked Sep 29, 2026	501-1,000	707 contacts →
	Indirect evidence “Schnabel is a trusted partner in building the foundation for project success.” Source: RevenueBase Database · checked Sep 29, 2026
9	Orbital Engineering, INC	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 29, 2026	501-1,000	528 contacts →
	Indirect evidence “For 50 years, Orbital Engineering has provided the full-service Engineering, Risk Mitigation, and Project Delivery expertise of a large company with the flexibility…” Source: RevenueBase Database · checked Sep 29, 2026
10	Nova Engineering And Environmental, LLC	Indirect evidence	Kennesaw, GA, United StatesHQ checked Sep 29, 2026	501-1,000	518 contacts →
	Indirect evidence “Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…” Source: RevenueBase Database · checked Sep 29, 2026
11	RTM Engineering Consultants	Indirect evidence	Schaumburg, IL, United StatesHQ checked Sep 29, 2026	201-500	516 contacts →
	Indirect evidence “We are an engineering firm that goes beyond a typical consulting role.” Source: RevenueBase Database · checked Sep 29, 2026
12	Desimone Consulting Engineering	Indirect evidence	New York, NY, United StatesHQ checked Sep 29, 2026	501-1,000	512 contacts →
	Indirect evidence “Founded in New York City in 1969, DeSimone provides structural engineering, façade and building envelope consulting, vertical transportation consulting, forensics, structural…” Source: RevenueBase Database · checked Sep 29, 2026
13	TTW	Indirect evidence	North Sydney, AustraliaHQ checked Sep 29, 2026	501-1,000	472 contacts →
	Indirect evidence “Great engineering starts with great people.” Source: RevenueBase Database · checked Sep 29, 2026
14	MBP Mcdonough Bolyard Peck	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 29, 2026	201-500	467 contacts →
	Indirect evidence “MBP is a multi-disciplined consulting firm that provides a broad range of professional services designed to mitigate risk and optimize value within the built environment.” Source: RevenueBase Database · checked Sep 29, 2026
15	JW Consultants LLP	Partial evidence	Pune, IndiaHQ checked Sep 29, 2026	201-500	465 contacts →
	Partial evidence “JW Consultants LLP is among India's top Structural Consulting firms, providing services to architects, owners, contractors, and developers Since our establishment in 1975 as a…” Source: RevenueBase Database · checked Sep 29, 2026
16	Geo-Technology Associates, Inc. GTA	Indirect evidence	Abingdon, MD, United KingdomHQ checked Sep 29, 2026	501-1,000	460 contacts →
	Indirect evidence “Geo-Technology Associates, Inc.(GTA) proudly celebrates more than 40 years of service, backed by a team of 600+ professionals-including geotechnical engineers, environmental…” Source: RevenueBase Database · checked Sep 29, 2026
17	GBI	Indirect evidence	Montréal, QC, CanadaHQ checked Sep 29, 2026	201-500	456 contacts →
	Indirect evidence “Notre firme de génie-conseil offre une gamme complète de services d’ingénierie, adaptés aux besoins d’une clientèle diversifiée, tant publique que privée.” Source: RevenueBase Database · checked Sep 29, 2026
18	Lerch Bates INC	Partial evidence	Highlands Ranch, CO, United StatesHQ checked Sep 29, 2026	201-500	441 contacts →
	Partial evidence “Lerch Bates is the global multidisciplinary technical consultancy saving time and money for those designing, modernizing, investigating, or managing buildings.” Source: RevenueBase Database · checked Sep 29, 2026
19	Groupe Géotec	Indirect evidence	Quetigny, FranceHQ checked Sep 29, 2026	501-1,000	441 contacts →
	Indirect evidence “Groupe Géotec, bureau d’études en ingénierie géotechnique et environnementale, créé en 1973, conseille l’ensemble des interlocuteurs de l’acte de construire : maîtres d’ouvrage…” Source: RevenueBase Database · checked Sep 29, 2026
20	Fairhurst	Indirect evidence	Glasgow, United KingdomHQ checked Sep 29, 2026	201-500	437 contacts →
	Indirect evidence “Welcome to Fairhurst: Fairhurst is a Limited Liability Partnership (LLP) of Consulting Engineers practicing in the UK, employing circa 400 staff in 16 principal offices.” Source: RevenueBase Database · checked Sep 29, 2026
21	Postensa	Indirect evidence	México, MexicoHQ checked Sep 29, 2026	201-500	431 contacts →
	Indirect evidence “Con una historia continua de expansión y éxito que abarca más de seis décadas, Postensa es actualmente una de las compañías Consultoras de Ingeniería Estructural más grandes de…” Source: RevenueBase Database · checked Sep 29, 2026
22	DCI Engineers	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	201-500	404 contacts →
	Indirect evidence “DCI Engineers has been providing client-focused structural and civil engineering services for over three decades.” Source: RevenueBase Database · checked Sep 29, 2026
23	Progeo Engenharia Ltda	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 29, 2026	501-1,000	400 contacts →
	Indirect evidence “Fundada em 1981, a empresa é focada na execução de serviços especiais de geologia, engenharia geotécnica e recuperação de estruturas.” Source: RevenueBase Database · checked Sep 29, 2026
24	Entuitive	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 29, 2026	201-500	378 contacts →
	Indirect evidence “ENTUITIVE BRINGS ENGINEERING AND INTUITION TOGETHER.” Source: RevenueBase Database · checked Sep 29, 2026
25	Degenkolb Engineers	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	201-500	332 contacts →
	Indirect evidence “Founded in 1940, Degenkolb Engineers’ practice reflects more than eight decades of commitment to expertise, client service, and life-long learning.” Source: RevenueBase Database · checked Sep 29, 2026

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 consultants. 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 consultants.
Partial evidence: Its own public description names part of seismic retrofit consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name seismic retrofit consultants. 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 11,858 seismic retrofit consultants worldwide

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Seismic retrofit consultants worldwide at a glance

As of Sep 29, 2026

35.8%Verified-email coverage

9.9Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

7,221

11-50

3,625

51-200

768

201-500

122

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

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 consultants, 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.
Coverage: Every country. Country and city lists for seismic retrofit consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “seismic retrofit consultants”. 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 consultants), 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 consultants, and records with no verified work email.
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, 41,984 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 29, 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 consultants by location

58 lists · largest first

Every Seismic retrofit consultants 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 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 consultants, 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 consultants are there worldwide?

RevenueBase identified 11,858 seismic retrofit consultants worldwide 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?

ECS Group Of Companies, headquartered in Chantilly, tops this list with the largest team on record.

Which country has the most seismic retrofit consultants?

The United States leads with 2,500 companies, followed by Brazil (1,051) and Italy (630). Every seismic retrofit consultants list by country and city is linked on this page.

Which city has the most seismic retrofit consultants?

Sao Paulo leads with 175 headquartered companies, followed by London (81) and New York (70).

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 41,984 verified decision-maker contacts tracked across these 11,858 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 29, 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.