Company lists · Data refreshed November 2026

Top 25 Rock core testing laboratories based in the United States

RevenueBase identified 120 company matches for rock core testing laboratories associated with the United States as of November 2026 and tracks 2,097 professional contacts across them, including 770 with verified work emails. Houston is the largest hub.

This list covers company matches for rock core testing laboratories 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
120Companies
2,097Contacts tracked
770Verified emails
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The 25 largest rock core testing laboratories based in the United States

Ranked by team size
Top 25 of 120 company matches for rock core testing laboratories 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 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
2Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202651-20094 contacts →

Exact match

“Bridging the gap between geology and engineering.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchEast Pittsburgh, NC, United StatesHQ recorded Nov 6, 202611-5086 contacts →

Exact match

“Geotechnics is an independent accredited laboratory, with locations in Pittsburgh, Raleigh, Nashville and St, Louis, that provides: Geotechnical and Geosynthetic Laboratory and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchLewis Center, OH, United StatesHQ recorded Nov 6, 202611-5062 contacts →

Exact match

“Founded in 1939, Gilson Company, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchCleveland, OH, United StatesHQ recorded Nov 6, 202651-20060 contacts →

Exact match

“In business since 1945, NSL is an ISO/IEC 17025, Nadcap certified, ASME NQA-1, 10 CFR 50 Appendix B (Nuclear) Certified Independent Commercial Testing Laboratory providing…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchOklahoma City, OK, United StatesHQ recorded Nov 6, 202651-20049 contacts →

Exact match

“Standard Engineering & Field Services was founded in 1951 as a professional engineering firm specializing in geotechnical and materials testing and engineering services for the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchCary, NC, United StatesHQ recorded Nov 6, 202611-5046 contacts →

Exact match

“Formerly Tierra of NC, the company began its operation offering geotechnical engineering and construction materials testing as its core services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202651-20044 contacts →

Exact match

“Aviles Engineering Corporation (AEC) is a civil engineering firm that provides Geotechnical Engineering and Construction Materials Testing and Inspection (CMT).”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchLong Beach, CA, United StatesHQ recorded Nov 6, 202611-5043 contacts →

Exact match

“With over 22 years in the industry, Twining Consulting, has the project experience and industry resources to provide the most cost efficient testing, inspection and engineering…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchChino, CA, United StatesHQ recorded Nov 6, 202651-20042 contacts →

Exact match

“Koury Engineering and Testing, Inc.(Koury) has been providing construction inspection and testing services since 1992, under the leadership of Dave Menefee, Sr.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchBluffdale, UT, United StatesHQ recorded Nov 6, 202611-5036 contacts →

Exact match

“GeoStrata was established in by Mr.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchManassas, VA, United StatesHQ recorded Nov 6, 202611-5032 contacts →

Exact match

“Soil Consultants Engineering (SCE) is a privately held, certified DBE, WBE, MBE, originally founded in 1960.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchSparks, NV, United StatesHQ recorded Nov 6, 202611-5027 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchBoynton Beach, FL, United StatesHQ recorded Nov 6, 202611-5027 contacts →

Exact match

“Since our early beginnings in 1932 as HC Nutting, we have continuously performed Geotechnical Engineering, Construction Materials Testing, Pile Load Test and Pile Installation…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202611-5027 contacts →

Exact match

“Established in 1967, The Murillo Company (TMC) specializes in Geotechnical Engineering, Construction Materials Testing and Inspection, and a wide range of Environmental Services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchTucson, AZ, United StatesHQ recorded Nov 6, 202651-20026 contacts →

Exact match

“Skyline Laboratories, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchGreendale, WI, United StatesHQ recorded Nov 6, 202611-5026 contacts →

Exact match

“Established in 1939, we are one of the oldest and most experienced metallurgical testing laboratories in the United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchElgin, IL, United StatesHQ recorded Nov 6, 202651-20023 contacts →

Exact match

“Humboldt Mfg.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLittle Rock, AR, United StatesHQ recorded Nov 6, 202611-5022 contacts →

Exact match

“We are a Geotechnical / Civil Engineering firm.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchZelienople, PA, United StatesHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“Founded by Joe Forney in 1916, Forney is a construction materials testing manufacturer and innovator based in Zelienople, Pennsylvania.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchDoylestown, OH, United StatesHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“Our staff of engineers and geoscience professionals have the know-how and industry experience to perform every facet of subsurface soil exploration, from scheduling and performing…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchSan Antonio, TX, United StatesHQ recorded Nov 6, 202611-5021 contacts →

Exact match

“Integrated Testing and Engineering Company of San Antonio (InTEC of San Antonio) has been providing geotechnical, environmental, geologic, and construction materials testing…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchFishers, IN, United StatesHQ recorded Nov 6, 202651-20021 contacts →

Exact match

“GEOTILL was founded with a goal to provide a comprehensive range of quality geotechnical and construction-related testing services compatible with the needs of its clients, on…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202651-20020 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchYork, United StatesHQ recorded Nov 6, 202651-20019 contacts →

Exact match

“PMI USA provides testing of porous materials and is a well-recognized market leader in porosity solutions.”

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

Showing 25 of 120 rock core testing laboratories based in the United States

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Rock core testing laboratories based in the United States at a glance

As of Nov 6, 2026
36.7%Verified-email coverage
17.5Average contacts per company
11-50Median size (employees)
8.3%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
47
11-50
52
51-200
18
201-500
2
501-1,000
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 120 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 “rock core testing laboratories” 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 770 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.

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 “rock core testing laboratories”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many rock core testing laboratories are there based in the United States?

RevenueBase identified 120 company matches for rock core testing laboratories 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?

Twining, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most rock core testing laboratories?

Houston leads with 10 company records, followed by Riverside (4) and Elgin (3).

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 770 professional contacts with verified work emails tracked across these 120 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 120 rock core testing laboratories 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.