Company lists · Data refreshed September 2026

Top 25 Seismic engineering companies based in the United States

Name: Seismic engineering companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,552 companies tracked

RevenueBase identified 1,552 seismic engineering companies headquartered in the United States as of September 2026 and tracks 26,497 professional contacts across them, including 12,390 with verified work emails. Houston is the largest hub.

This list covers seismic engineering 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 17, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

1,552Companies

26,497Contacts tracked

12,390Verified emails

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The 25 largest seismic engineering companies based in the United States

Ranked by team size

Top 25 of 1,552 seismic engineering companies based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to seismic engineering companies: 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	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,210 contacts →
	Partial evidence “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Source: RevenueBase Database · checked Sep 17, 2026
2	Schnabel Engineering	Indirect evidence	Glen Allen, VA, United StatesHQ checked Sep 17, 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 17, 2026
3	Raba Kistner, INC	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	501-1,000	582 contacts →
	Indirect evidence “Founded in 1968, Raba Kistner Inc.” Source: RevenueBase Database · checked Sep 17, 2026
4	Saexploration	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	521 contacts →
	Indirect evidence “SAExploration offers a full range of geophysical ground acquisition services from design, prospecting, drilling, recording and analysis of field quality, as well as mobilization…” Source: RevenueBase Database · checked Sep 17, 2026
5	Nova Engineering And Environmental, LLC	Partial evidence	Kennesaw, GA, United StatesHQ checked Sep 17, 2026	501-1,000	518 contacts →
	Partial 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 17, 2026
6	Collins Engineers, INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	201-500	432 contacts →
	Indirect evidence “In 1979, Collins Engineers, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
7	Degenkolb Engineers	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 17, 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 17, 2026
8	Hillis-Carnes Engineering Associates, INC	Partial evidence	Annapolis Junction, MD, United StatesHQ checked Sep 17, 2026	201-500	299 contacts →
	Partial evidence “Hillis-Carnes Engineering Associates, Inc.(HCEA) is a Mid-Atlantic based, multi-disciplined consulting engineering firm.” Source: RevenueBase Database · checked Sep 17, 2026
9	ENGEO	Indirect evidence	San Ramon, CA, United StatesHQ checked Sep 17, 2026	201-500	282 contacts →
	Indirect evidence “ENGEO Incorporated is an award-winning, employee-owned comprehensive provider of more than 400 geotechnical and civil engineers, geologists, GIS experts, environmental scientists…” Source: RevenueBase Database · checked Sep 17, 2026
10	Ag&e	Partial evidence	Dallas, TX, United StatesHQ checked Sep 17, 2026	201-500	280 contacts →
	Partial evidence “AG & E is the nation's largest structural engineering firm focused on data centers.” Source: RevenueBase Database · checked Sep 17, 2026
11	Modjeski And Masters	Indirect evidence	Mechanicsburg, PA, United StatesHQ checked Sep 17, 2026	201-500	241 contacts →
	Indirect evidence “Modjeski and Masters is a nationwide leader in the design, inspection, and rehabilitation of all bridges types, including long-span and movable structures.” Source: RevenueBase Database · checked Sep 17, 2026
12	Computers And Structures, INC	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 17, 2026	51-200	218 contacts →
	Partial evidence “Founded in 1975, Computers and Structures, Inc.(CSI) is recognized globally as the pioneering leader in software tools for structural and earthquake engineering.” Source: RevenueBase Database · checked Sep 17, 2026
13	Geotek	Partial evidence	Las Vegas, NV, United StatesHQ checked Sep 17, 2026	201-500	215 contacts →
	Partial evidence “Incorporated in 1997, GeoTek is a full service consulting engineering firm specializing in geotechnical engineering, construction materials testing, special inspection, and…” Source: RevenueBase Database · checked Sep 17, 2026
14	Geocon	Partial evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	201-500	197 contacts →
	Partial evidence “Geocon is a California corporation established in 1971 as a professional engineering consulting firm providing comprehensive geotechnical engineering, geotechnical…” Source: RevenueBase Database · checked Sep 17, 2026
15	Magnusson Klemencic Associates	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	190 contacts →
	Indirect evidence “We engineer the future of the built environment, one structure, skyline, and community at a time.” Source: RevenueBase Database · checked Sep 17, 2026
16	CTL Thompson	Partial evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	201-500	189 contacts →
	Partial evidence “CTL\|Thompson (CTL\|T) has been providing innovative engineering solutions throughout Colorado since 1971.” Source: RevenueBase Database · checked Sep 17, 2026
17	Miyamoto International	Partial evidence	West Sacramento, CA, United StatesHQ checked Sep 17, 2026	201-500	181 contacts →
	Partial evidence “We are a global engineering and disaster management firm providing expert solutions to sustain industries and safeguard communities.” Source: RevenueBase Database · checked Sep 17, 2026
18	United Consulting	Partial evidence	Norcross, GA, United StatesHQ checked Sep 17, 2026	51-200	176 contacts →
	Partial evidence “United Consulting is a multi-disciplined engineering consulting firm located in Norcross, Georgia.” Source: RevenueBase Database · checked Sep 17, 2026
19	Lera Consulting Structural Engineers	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	172 contacts →
	Partial evidence “LERA Consulting Structural Engineers (LERA) is a M/WBE structural engineering firm providing services to architects, owners, contractors, and developers.” Source: RevenueBase Database · checked Sep 17, 2026
20	Certerra RMA Group	Partial evidence	Rancho Cucamonga, CA, United StatesHQ checked Sep 17, 2026	201-500	172 contacts →
	Partial evidence “Certerra RMA Group is a client-centered geotechnical engineering and materials testing consulting firm with office and laboratory facilities located throughout California and Las…” Source: RevenueBase Database · checked Sep 17, 2026
21	ESG Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	169 contacts →
	Indirect evidence “ESG Solutions is a world leader in passive microseismic monitoring.” Source: RevenueBase Database · checked Sep 17, 2026
22	Rizzo International	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 17, 2026	51-200	165 contacts →
	Partial evidence “RIZZO International, Inc.(RIZZO) is a global engineering and consulting firm headquartered in Pittsburgh, Pennsylvania US.” Source: RevenueBase Database · checked Sep 17, 2026
23	Rocksol Consulting Group, INC	Partial evidence	Thornton, CO, United StatesHQ checked Sep 17, 2026	201-500	161 contacts →
	Partial evidence “Since 1996, RockSol has earned an outstanding reputation for engineering excellence, customer service, and quality assurance.” Source: RevenueBase Database · checked Sep 17, 2026
24	Building & Earth	Partial evidence	Birmingham, AL, United StatesHQ checked Sep 17, 2026	201-500	161 contacts →
	Partial evidence “Building & Earth is a professional engineering firm, specializing in geotechnical engineering, construction materials testing, special inspections per I.B.C./I.C.C.” Source: RevenueBase Database · checked Sep 17, 2026
25	Mueser Rutledge Consulting Engineers	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	157 contacts →
	Partial evidence “Mueser Rutledge Consulting Engineers is a leading engineering firm providing structural design of foundations and waterfront structures and complete geotechnical studies.” Source: RevenueBase Database · checked Sep 17, 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 engineering 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 engineering companies.
Partial evidence: Its own public description names part of seismic engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name seismic engineering 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 1,552 seismic engineering companies based in the United States

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Seismic engineering companies based in the United States at a glance

As of Sep 17, 2026

46.8%Verified-email coverage

17.1Average contacts per company

1-10Median size (employees)

3.7%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

867

11-50

495

51-200

157

201-500

501-1,000

1,001-5,000

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 1,552 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 engineering 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 engineering 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 engineering 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 engineering 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, 12,390 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 17, 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 engineering companies by metro

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 engineering 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 engineering companies are there based in the United States?

RevenueBase identified 1,552 seismic engineering 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?

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

Which city has the most seismic engineering companies?

Houston leads with 57 headquartered companies, followed by San Francisco (30) and New York (26).

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 12,390 verified decision-maker contacts tracked across these 1,552 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 17, 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.