Company lists · Data refreshed September 2026

Top 25 Geophysical consulting firms worldwide

RevenueBase identified 15,652 geophysical consulting firms worldwide as of September 2026 and tracks 311,388 professional contacts across them, including 100,133 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers geophysical consulting firms 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 28, 2026. Country and city lists for geophysical consulting firms 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 28, 2026 86% judged on-target in blind review
15,652Companies
311,388Contacts tracked
100,133Verified emails
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The 25 largest geophysical consulting firms worldwide

Ranked by team size
Top 25 of 15,652 geophysical consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to geophysical consulting firms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 202610001+53,380 contacts →

Indirect evidence

“We collaborate and engineer solutions to maximize asset value for our customers.”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceLeidschendam, NetherlandsHQ checked Sep 28, 202610001+8,248 contacts →

Indirect evidence

“We are the world’s leading Geo-data specialist, collecting and analysing comprehensive information about the Earth and the structures built upon it.”

Source: RevenueBase Database · checked Sep 28, 2026
3Partial evidenceOlathe, KS, United StatesHQ checked Sep 28, 20265,001-10,0006,113 contacts →

Partial evidence

“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceJakarta Selatan, IndonesiaHQ checked Sep 28, 20261,001-5,0003,932 contacts →

Indirect evidence

“We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceVancouver, BC, CanadaHQ checked Sep 28, 20265,001-10,0003,167 contacts →

Indirect evidence

“Golder was acquired by WSP.”

Source: RevenueBase Database · checked Sep 28, 2026
6Partial evidenceVancouver, CanadaHQ checked Sep 28, 20261,001-5,0002,259 contacts →

Partial evidence

“SRK Consulting is an independent, international group providing specialised consultancy services.”

Source: RevenueBase Database · checked Sep 28, 2026
7Partial evidenceChantilly, VA, United StatesHQ checked Sep 28, 20261,001-5,0002,210 contacts →

Partial evidence

“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceParsippany, NJ, United StatesHQ checked Sep 28, 20261,001-5,0002,177 contacts →

Indirect evidence

“Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.”

Source: RevenueBase Database · checked Sep 28, 2026
9Partial evidenceMenlo Park, CA, United StatesHQ checked Sep 28, 20261,001-5,0001,560 contacts →

Partial evidence

“In an era of accelerating change, Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most…”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceTorrance, CA, United StatesHQ checked Sep 28, 20261,001-5,0001,358 contacts →

Indirect evidence

“Partner Assessment Corp.”

Source: RevenueBase Database · checked Sep 28, 2026
11Partial evidenceDenver, CO, United StatesHQ checked Sep 28, 20261,001-5,0001,231 contacts →

Partial evidence

“Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceHebei, ChinaHQ checked Sep 28, 202610001+1,160 contacts →

Partial evidence

“BGP is one of the world's leading geophysical service companies, delivering a wide range of technologies, services and equipment to the oil and gas industry worldwide.”

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceTampa, FL, United StatesHQ checked Sep 28, 20261,001-5,0001,139 contacts →

Indirect evidence

“At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.”

Source: RevenueBase Database · checked Sep 28, 2026
14Indirect evidenceRockville, MD, United StatesHQ checked Sep 28, 20261,001-5,0001,137 contacts →

Indirect evidence

“Who is Apex?”

Source: RevenueBase Database · checked Sep 28, 2026
15Indirect evidenceBurlington, MA, United StatesHQ checked Sep 28, 2026501-1,0001,124 contacts →

Indirect evidence

“Haley & Aldrich is committed to solving our clients’ most meaningful challenges in the built and natural environments.”

Source: RevenueBase Database · checked Sep 28, 2026
16Partial evidenceMinneapolis, MN, United StatesHQ checked Sep 28, 20261,001-5,0001,088 contacts →

Partial evidence

“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.”

Source: RevenueBase Database · checked Sep 28, 2026
17Indirect evidenceRichmond, VA, United StatesHQ checked Sep 28, 20261,001-5,0001,066 contacts →

Indirect evidence

“Timmons Group is an engineering & technology firm specializing in civil, environmental, GIS, and surveying services to clients across the US.”

Source: RevenueBase Database · checked Sep 28, 2026
18Indirect evidenceLaksevåg, NorwayHQ checked Sep 28, 20261,001-5,0001,031 contacts →

Indirect evidence

“Shearwater is a global marine geoscience and technology business.”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceMauritius, AustriaHQ checked Sep 28, 20261,001-5,000994 contacts →

Indirect evidence

“Capital Limited is a leading service provider for the exploration and mining industry.”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceUnited StatesHQ checked Sep 28, 20261,001-5,000908 contacts →

Indirect evidence

“Viridien is an advanced technology, digital and Earth data company that pushes the boundaries of science for a more prosperous and sustainable future.”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceKolkata, IndiaHQ checked Sep 28, 20261,001-5,000894 contacts →

Indirect evidence

“M.”

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidenceNorwood, MA, United StatesHQ checked Sep 28, 2026501-1,000880 contacts →

Indirect evidence

“Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…”

Source: RevenueBase Database · checked Sep 28, 2026
23Partial evidenceVancouver, BC, CanadaHQ checked Sep 28, 2026501-1,000871 contacts →

Partial evidence

“KCB is a global engineering, geosciences, and environmental consulting firm driven by Passion, Integrity and a commitment to Excellence.”

Source: RevenueBase Database · checked Sep 28, 2026
24Indirect evidenceSeattle, WA, United StatesHQ checked Sep 28, 2026501-1,000859 contacts →

Indirect evidence

“The right team is more than an advantage.”

Source: RevenueBase Database · checked Sep 28, 2026
25Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 2026501-1,000834 contacts →

Partial evidence

“Headquartered in Houston, Texas, Geokinetics is one of the world’s largest independent land and seafloor geophysical companies.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 15,652 geophysical consulting firms worldwide

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Geophysical consulting firms worldwide at a glance

As of Sep 28, 2026
32.2%Verified-email coverage
19.9Average contacts per company
1-10Median size (employees)
1.6%Largest-city concentration · Houston
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
8,488
11-50
5,041
51-200
1,564
201-500
314
501-1,000
94
1,001-5,000
65
5,001-10,000
9
10001+
15

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 geophysical consulting firms, 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 geophysical consulting firms are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “geophysical consulting firms”. 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 geophysical consulting firms), 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 geophysical consulting firms, 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, 100,133 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 28, 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.

Geophysical consulting firms by location

71 lists · largest first

Every Geophysical consulting 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 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 geophysical consulting firms, 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 geophysical consulting firms are there worldwide?

RevenueBase identified 15,652 geophysical consulting firms 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?

Halliburton, headquartered in Houston, tops this list with the largest team on record.

Which country has the most geophysical consulting firms?

The United States leads with 3,142 companies, followed by Brazil (1,205) and Canada (968). Every geophysical consulting firms list by country and city is linked on this page.

Which city has the most geophysical consulting firms?

Houston leads with 254 headquartered companies, followed by Calgary (215) and Belo Horizonte (171).

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 100,133 verified decision-maker contacts tracked across these 15,652 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 28, 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.