Company lists · Data refreshed September 2026

Top 25 Geological consultants worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 33,929 companies tracked

RevenueBase identified 33,929 geological consultants worldwide as of September 2026 and tracks 530,258 professional contacts across them, including 160,235 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers geological 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 21, 2026. Country and city lists for geological 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 21, 2026 86% judged on-target in blind review

33,929Companies

530,258Contacts tracked

160,235Verified emails

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The 25 largest geological consultants worldwide

Ranked by team size

Top 25 of 33,929 geological consultants worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to geological 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	WOOD	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	10001+	26,949 contacts →
	Indirect evidence “Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.” Source: RevenueBase Database · checked Sep 21, 2026
2	FUGRO	Indirect evidence	Leidschendam, NetherlandsHQ checked Sep 21, 2026	10001+	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 21, 2026
3	Terracon	Indirect evidence	Olathe, KS, United StatesHQ checked Sep 21, 2026	5,001-10,000	6,113 contacts →
	Indirect evidence “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Source: RevenueBase Database · checked Sep 21, 2026
4	Keller	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	5,001-10,000	3,960 contacts →
	Indirect evidence “Every day, people around the world live, work and play on ground prepared by Keller, the world's largest geotechnical specialist contractor.” Source: RevenueBase Database · checked Sep 21, 2026
5	Ausenco	Indirect evidence	South Brisbane, AustraliaHQ checked Sep 21, 2026	1,001-5,000	3,826 contacts →
	Indirect evidence “We transform complex challenges into sustainable solutions for the minerals & metals and industrial sectors worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
6	Golder	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 21, 2026	5,001-10,000	3,167 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 21, 2026
7	Macmahon	Indirect evidence	Perth Airport, AustraliaHQ checked Sep 21, 2026	10001+	2,592 contacts →
	Indirect evidence “Macmahon is a diversified contractor with leading capabilities in surface and underground mining, civil construction and resources engineering.” Source: RevenueBase Database · checked Sep 21, 2026
8	Geosyntec Consultants	Indirect evidence	Boca Raton, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,393 contacts →
	Indirect evidence “Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Source: RevenueBase Database · checked Sep 21, 2026
9	CYD Ingeniería	Indirect evidence	Santiago, ChileHQ checked Sep 21, 2026	1,001-5,000	2,390 contacts →
	Indirect evidence “Nuestro propósito es contribuir al progreso sostenible de Latinoamérica y el mundo, mejorando la calidad de vida de las comunidades y dejando huella en las personas.” Source: RevenueBase Database · checked Sep 21, 2026
10	SRK Consulting	Partial evidence	Vancouver, CanadaHQ checked Sep 21, 2026	1,001-5,000	2,259 contacts →
	Partial evidence “SRK Consulting is an independent, international group providing specialised consultancy services.” Source: RevenueBase Database · checked Sep 21, 2026
11	Alfred H Knight	Partial evidence	Prescot, United KingdomHQ checked Sep 21, 2026	1,001-5,000	2,239 contacts →
	Partial evidence “Alfred H Knight is a leading provider of inspection, analytical and technical consultancy services for the metals, minerals, solid fuels and agricultural industries.” Source: RevenueBase Database · checked Sep 21, 2026
12	Providence	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 21, 2026	n/a	2,232 contacts →
	Indirect evidence “Providence is an employee-owned engineering and environmental consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
13	ECS Group Of Companies	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 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 21, 2026
14	DRA Global	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 21, 2026	1,001-5,000	2,180 contacts →
	Indirect evidence “DRA Global Limited (DRA or the Group) is an international multi-disciplinary engineering, project delivery and operations management group, predominantly focused on the mining…” Source: RevenueBase Database · checked Sep 21, 2026
15	Langan Engineering & Environmental Services	Indirect evidence	Parsippany, NJ, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,177 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 21, 2026
16	Englobe	Indirect evidence	Québec, QC, CanadaHQ checked Sep 21, 2026	1,001-5,000	1,852 contacts →
	Indirect evidence “Englobe is a leader in the fields of engineering, gesosciences, environmental management, asset integrity and quality management.” Source: RevenueBase Database · checked Sep 21, 2026
17	Exponent	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,560 contacts →
	Indirect 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 21, 2026
18	Pt. Surveyor Indonesia	Indirect evidence	IndonesiaHQ checked Sep 21, 2026	1,001-5,000	1,537 contacts →
	Indirect evidence “Surveyor Indonesia was incepted on 1 August 1991.” Source: RevenueBase Database · checked Sep 21, 2026
19	Thriveni Earthmovers Pvt.Ltd	Indirect evidence	IndiaHQ checked Sep 21, 2026	5,001-10,000	1,506 contacts →
	Indirect evidence “A proven track record spanning two decades of experience, a project portfolio that testifies our expertise and a prominent client base from the mining and manufacturing industry…” Source: RevenueBase Database · checked Sep 21, 2026
20	RENCO	Indirect evidence	Pesaro, ItalyHQ checked Sep 21, 2026	1,001-5,000	1,494 contacts →
	Indirect evidence “Renco S.p.A, an Italian company founded in 1979, is continually committed to providing its Clients with sound business solutions in an ever increasingly complex and challenging…” Source: RevenueBase Database · checked Sep 21, 2026
21	Major Drilling	Indirect evidence	Moncton, NB, CanadaHQ checked Sep 21, 2026	1,001-5,000	1,447 contacts →
	Indirect evidence “Major Drilling Group International Inc.” Source: RevenueBase Database · checked Sep 21, 2026
22	PT Saptaindra Sejati SIS	Indirect evidence	Jakarta Selatan, IndonesiaHQ checked Sep 21, 2026	10001+	1,419 contacts →
	Indirect evidence “PT Saptaindra Sejati (SIS) is one of Indonesia’s largest mining contractors.” Source: RevenueBase Database · checked Sep 21, 2026
23	Partner Engineering & Science, INC	Indirect evidence	Torrance, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,358 contacts →
	Indirect evidence “Partner Assessment Corp.” Source: RevenueBase Database · checked Sep 21, 2026
24	Geosol Geologia E Sondagens S.A	Partial evidence	Belo Horizonte, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,317 contacts →
	Partial evidence “One of the leading geology companies in the world, GEOSOL excels in the undertaking of geological drilling and mineral engineering programs.” Source: RevenueBase Database · checked Sep 21, 2026
25	Fraser Alexander	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 21, 2026	1,001-5,000	1,232 contacts →
	Indirect evidence “Fraser Alexander has been providing customised solutions to the mining industry since 1912.” Source: RevenueBase Database · checked Sep 21, 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: geological 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 geological consultants.
Partial evidence: Its own public description names part of geological consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geological 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 33,929 geological consultants worldwide

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Geological consultants worldwide at a glance

As of Sep 21, 2026

30.2%Verified-email coverage

15.6Average contacts per company

1-10Median size (employees)

1.0%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

18,813

11-50

10,439

51-200

3,320

201-500

753

501-1,000

240

1,001-5,000

157

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 geological 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 geological consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “geological 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 geological 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 geological 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, 160,235 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 21, 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.

Geological consultants by location

109 lists · largest first

Every Geological 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 geological 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 geological consultants are there worldwide?

RevenueBase identified 33,929 geological 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?

WOOD, headquartered in Aberdeen, tops this list with the largest team on record.

Which country has the most geological consultants?

The United States leads with 5,388 companies, followed by Brazil (2,524) and Australia (2,438). Every geological consultants list by country and city is linked on this page.

Which city has the most geological consultants?

Houston leads with 329 headquartered companies, followed by Perth (321) and Calgary (316).

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 160,235 verified decision-maker contacts tracked across these 33,929 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 21, 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.