Company lists · Data refreshed September 2026

Top 25 Geotechnical engineering staffing companies worldwide

Name: Geotechnical engineering staffing companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 20,118 companies tracked

RevenueBase identified 20,118 geotechnical engineering staffing companies worldwide as of September 2026 and tracks 327,804 professional contacts across them, including 92,379 with verified work emails. The United States is the largest market and London the largest hub.

This list covers geotechnical engineering staffing companies 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 geotechnical engineering staffing companies 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

20,118Companies

327,804Contacts tracked

92,379Verified emails

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The 25 largest geotechnical engineering staffing companies worldwide

Ranked by team size

Top 25 of 20,118 geotechnical engineering staffing companies worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to geotechnical engineering staffing 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	Terracon	Partial evidence	Olathe, KS, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,113 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
2	Keller	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	5,001-10,000	3,960 contacts →
	Partial 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 28, 2026
3	Golder	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	5,001-10,000	3,167 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 28, 2026
4	ECS Group Of Companies	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 28, 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 28, 2026
5	Bouygues Travaux Publics	Indirect evidence	Saint-quentin-en-yvelines Cedex, FranceHQ checked Sep 28, 2026	10001+	1,850 contacts →
	Indirect evidence “CONSTRUIRE DES INFRASTRUCTURES DURABLES Bouygues TP est l’un des leaders mondiaux dans les domaines de l’aménagement du territoire et de la construction d’infrastructures durables.” Source: RevenueBase Database · checked Sep 28, 2026
6	SEP Engineers	Partial evidence	Skelmersdale, United KingdomHQ checked Sep 28, 2026	n/a	1,837 contacts →
	Partial evidence “Established in 1986, SEP has been the industry’s leader for site engineering, surveying and management solutions for over thirty years, providing vital services, resources and…” Source: RevenueBase Database · checked Sep 28, 2026
7	Bowman Consulting	Partial evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,666 contacts →
	Partial evidence “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Source: RevenueBase Database · checked Sep 28, 2026
8	UES	Partial evidence	Orlando, FL, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,595 contacts →
	Partial evidence “UES provides professional engineering, environmental, testing and inspection services to clients across the United States.” Source: RevenueBase Database · checked Sep 28, 2026
9	RENCO	Indirect evidence	Pesaro, ItalyHQ checked Sep 28, 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 28, 2026
10	Arab Center For Engineering Studies	Strong evidence	Amman, JordanHQ checked Sep 28, 2026	1,001-5,000	1,476 contacts →
	Strong evidence “At ACES, we offer a wide range of specialized engineering services including site and geotechnical investigation, materials technology and testing, quality control of projects…” Source: RevenueBase Database · checked Sep 28, 2026
11	Toniolo, Busnello SA	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 28, 2026	1,001-5,000	1,271 contacts →
	Indirect evidence “A Toniolo, Busnello S.A.” Source: RevenueBase Database · checked Sep 28, 2026
12	Milicic SA	Indirect evidence	Rosario, ArgentinaHQ checked Sep 28, 2026	1,001-5,000	1,269 contacts →
	Indirect evidence “We are an Argentine construction and services company with 50 years of experience in large-scale projects that have supported the development of key productive sectors.” Source: RevenueBase Database · checked Sep 28, 2026
13	Construction Labor Contractors	Partial evidence	Round Rock, TX, United StatesHQ checked Sep 28, 2026	501-1,000	1,234 contacts →
	Partial evidence “Let us make construction staffing work for you.” Source: RevenueBase Database · checked Sep 28, 2026
14	Soletanche Bachy	Indirect evidence	Rueil-malmaison, FranceHQ checked Sep 28, 2026	5,001-10,000	1,222 contacts →
	Indirect evidence “Soletanche Bachy is a world benchmark in foundations and soil technologies, and is involved in over projects every year.” Source: RevenueBase Database · checked Sep 28, 2026
15	Contech Engineered Solutions	Indirect evidence	West Chester, OH, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,217 contacts →
	Indirect evidence “Contech provides innovative, cost-effective site solutions to engineers, contractors, and developers on projects across North America.” Source: RevenueBase Database · checked Sep 28, 2026
16	TRS Staffing Solutions	Strong evidence	Greenville, United StatesHQ checked Sep 28, 2026	201-500	1,187 contacts →
	Strong evidence “TRS Staffing Solutions is a world leading engineering recruitment agency specialising in the recruitment and supply of professional, engineering, technical and field talent.” Source: RevenueBase Database · checked Sep 28, 2026
17	Timmons Group	Partial evidence	Richmond, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,066 contacts →
	Partial 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
18	M. N. Dastur & Co. P LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	1,001-5,000	894 contacts →
	Indirect evidence “M.” Source: RevenueBase Database · checked Sep 28, 2026
19	GZA Geoenvironmental, INC	Indirect evidence	Norwood, MA, United StatesHQ checked Sep 28, 2026	501-1,000	880 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
20	Klohn Crippen Berger	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	501-1,000	871 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
21	Tecnosonda S A	Strong evidence	Rio De Janeiro, BrazilHQ checked Sep 28, 2026	1,001-5,000	862 contacts →
	Strong evidence “Tecnosonda is an engineering company founded in 1968, which operates in the areas of Geotechnics, Foundations, Civil Construction, Electromechanics, and Industrial Maintenance.” Source: RevenueBase Database · checked Sep 28, 2026
22	Ingenieria Civil Vicente	Indirect evidence	Santiago, ChileHQ checked Sep 28, 2026	1,001-5,000	848 contacts →
	Indirect evidence “Más de 60 años aportando al país, a través de servicios integrales para la gran minería, movimiento de tierras masivos y obras de ingeniería civil.” Source: RevenueBase Database · checked Sep 28, 2026
23	JKS A S	Indirect evidence	Ringkøbing, DenmarkHQ checked Sep 28, 2026	1,001-5,000	822 contacts →
	Indirect evidence “We are JKS.” Source: RevenueBase Database · checked Sep 28, 2026
24	BGC Engineering INC	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	501-1,000	798 contacts →
	Partial evidence “BGC Engineering is an international consulting firm that provides professional services in applied earth sciences.” Source: RevenueBase Database · checked Sep 28, 2026
25	Dywidag	Indirect evidence	Unterschleißheim, GermanyHQ checked Sep 28, 2026	1,001-5,000	787 contacts →
	Indirect evidence “Here at DYWIDAG, our mission is to make structures safer, stronger, and smarter.” Source: RevenueBase Database · checked Sep 28, 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: geotechnical engineering staffing 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 geotechnical engineering staffing companies.
Partial evidence: Its own public description names part of geotechnical engineering staffing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geotechnical engineering staffing 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 20,118 geotechnical engineering staffing companies worldwide

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Geotechnical engineering staffing companies worldwide at a glance

As of Sep 28, 2026

28.2%Verified-email coverage

16.3Average contacts per company

11-50Median size (employees)

1.3%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

9,709

11-50

6,616

51-200

2,626

201-500

658

501-1,000

232

1,001-5,000

132

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 geotechnical engineering staffing 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.
Coverage: Every country. Country and city lists for geotechnical engineering staffing companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “geotechnical engineering staffing 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 geotechnical engineering staffing 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 geotechnical engineering staffing companies, 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, 92,379 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.

Geotechnical engineering staffing companies by location

86 lists · largest first

Every Geotechnical engineering staffing companies 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 geotechnical engineering staffing 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 geotechnical engineering staffing companies are there worldwide?

RevenueBase identified 20,118 geotechnical engineering staffing companies 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?

Terracon, headquartered in Olathe, tops this list with the largest team on record.

Which country has the most geotechnical engineering staffing companies?

The United States leads with 4,059 companies, followed by the United Kingdom (1,580) and Brazil (1,404). Every geotechnical engineering staffing companies list by country and city is linked on this page.

Which city has the most geotechnical engineering staffing companies?

London leads with 252 headquartered companies, followed by Sao Paulo (210) and Belo Horizonte (144).

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 92,379 verified decision-maker contacts tracked across these 20,118 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.