Company lists · Data refreshed November 2026

Top 25 Geotechnical testing services based in the United States

RevenueBase identified 1,259 company matches for geotechnical testing services associated with the United States as of November 2026 and tracks 34,544 professional contacts across them, including 15,884 with verified work emails. Houston is the largest hub.

This list covers company matches for geotechnical testing services associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
1,259Companies
34,544Contacts tracked
15,884Verified emails
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The 25 largest geotechnical testing services based in the United States

Ranked by team size
Top 25 of 1,259 company matches for geotechnical testing services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchChantilly, VA, United StatesHQ recorded Nov 6, 20261,001-5,0002,363 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchOrlando, FL, United StatesHQ recorded Nov 6, 20261,001-5,0001,694 contacts →

Exact match

“UES provides professional engineering, environmental, testing and inspection services to clients across the United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchNorwood, MA, United StatesHQ recorded Nov 6, 2026501-1,000922 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchArlington Heights, NY, United StatesHQ recorded Nov 6, 20261,001-5,000795 contacts →

Exact match

“Intertek, a leading provider of quality solutions to industries around the world, has completed the acquisition of Professional Service Industries, Inc.(PSI), a leading…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchSan Antonio, UT, United StatesHQ recorded Nov 6, 2026501-1,000612 contacts →

Exact match

“Founded in 1968, Raba Kistner Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchKennesaw, FL, United StatesHQ recorded Nov 6, 2026501-1,000541 contacts →

Exact match

“Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchNew York, NY, United StatesHQ recorded Nov 6, 20261,001-5,000498 contacts →

Exact match

“Welcome to SOCOTEC in the US, Trusted Expertise, From the Ground Up.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchRichmond, VA, United StatesHQ recorded Nov 6, 2026201-500333 contacts →

Exact match

“Established in 1881, Froehling & Robertson, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchColumbus, OH, United StatesHQ recorded Nov 6, 2026201-500324 contacts →

Exact match

“CTL Engineering is a full service consulting engineering, testing, inspection, and analytical services company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchAnnapolis Junction, PA, United StatesHQ recorded Nov 6, 2026201-500315 contacts →

Exact match

“Hillis-Carnes Engineering Associates, Inc.(HCEA) is a Mid-Atlantic based, multi-disciplined consulting engineering firm.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchSan Ramon, CA, United StatesHQ recorded Nov 6, 2026201-500294 contacts →

Exact match

“ENGEO Incorporated is an award-winning, employee-owned comprehensive provider of more than 400 geotechnical and civil engineers, geologists, GIS experts, environmental scientists…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchParlin, NJ, United StatesHQ recorded Nov 6, 2026201-500287 contacts →

Exact match

“CME Associates, with eight (8) office locations throughout New Jersey, provides a complete range of Environmental, Geotechnical, Engineering, Surveying and Planning services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBothell, WA, United StatesHQ recorded Nov 6, 20261,001-5,000262 contacts →

Exact match

“CASCADE is the leading provider of environmental and geotechnical drilling, site investigation and environmental remediation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLas Vegas, CA, United StatesHQ recorded Nov 6, 2026201-500227 contacts →

Exact match

“Incorporated in 1997, GeoTek is a full service consulting engineering firm specializing in geotechnical engineering, construction materials testing, special inspection, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchFresno, CA, United StatesHQ recorded Nov 6, 2026201-500218 contacts →

Exact match

“Employee-Owned.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchSan Ramon, HI, United StatesHQ recorded Nov 6, 2026201-500208 contacts →

Exact match

“At Consolidated Engineering Laboratories (CEL) we consider ourselves more than a Testing Laboratory.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202651-200201 contacts →

Exact match

“Completing public infrastructure projects comes with tremendous pressure to serve the public while completing each project on-time and on-budget.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchIndianapolis, KY, United StatesHQ recorded Nov 6, 202651-200200 contacts →

Exact match

“Since its beginning in 1995, Patriot has built its reputation on serving the needs of the growing development and redevelopment community.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchDenver, CO, United StatesHQ recorded Nov 6, 2026201-500197 contacts →

Exact match

“CTL|Thompson (CTL|T) has been providing innovative engineering solutions throughout Colorado since 1971.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSan Diego, CA, United StatesHQ recorded Nov 6, 2026201-500196 contacts →

Exact match

“Geocon is a California corporation established in 1971 as a professional engineering consulting firm providing comprehensive geotechnical engineering, geotechnical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchIrvine, CA, United StatesHQ recorded Nov 6, 202651-200194 contacts →

Exact match

“Leighton, a Verdantas Company, provides environmental, geotechnical, materials testing, and special inspection services across the built community.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchLong Beach, CA, United StatesHQ recorded Nov 6, 2026201-500191 contacts →

Exact match

“Twining has continued to expand and evolve since its inception more than a century ago.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchGreenville, SC, United StatesHQ recorded Nov 6, 2026201-500187 contacts →

Exact match

“Bunnell-Lammons Engineering (BLE) provides engineering and environmental solutions for projects in commercial, industrial, institutional and infrastructure markets.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchNorcross, GA, United StatesHQ recorded Nov 6, 202651-200183 contacts →

Exact match

“United Consulting is a multi-disciplined engineering consulting firm located in Norcross, Georgia.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchRancho Cucamonga, CA, United StatesHQ recorded Nov 6, 2026201-500183 contacts →

Exact match

“Certerra RMA Group is a client-centered geotechnical engineering and materials testing consulting firm with office and laboratory facilities located throughout California and Las…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 1,259 geotechnical testing services based in the United States

See the full list, filter by size, metro and specialty, and access 15,884 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geotechnical testing services based in the United States at a glance

As of Nov 6, 2026
46.0%Verified-email coverage
27.4Average contacts per company
11-50Median size (employees)
2.8%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
483
11-50
500
51-200
222
201-500
33
501-1,000
7
1,001-5,000
9
10001+
1

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 1,259 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “geotechnical testing services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 15,884 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Geotechnical testing services by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “geotechnical testing services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geotechnical testing services are there based in the United States?

RevenueBase identified 1,259 company matches for geotechnical testing services associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

ECS Group Of Companies tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geotechnical testing services?

Houston leads with 35 company records, followed by New York (21) and Dallas (16).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 15,884 professional contacts with verified work emails tracked across these 1,259 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,259 geotechnical testing services based in the United States. Start with a free account, no credit card.

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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 SmartSearch, 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.