Company lists · Data refreshed November 2026

Top 25 Aggregate testing labs based in the United States

RevenueBase identified 218 company matches for aggregate testing labs associated with the United States as of November 2026 and tracks 5,064 professional contacts across them, including 1,936 with verified work emails. Houston is the largest hub.

This list covers company matches for aggregate testing labs 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
218Companies
5,064Contacts tracked
1,936Verified emails
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The 25 largest aggregate testing labs based in the United States

Ranked by team size
Top 25 of 218 company matches for aggregate testing labs 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 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
2Exact 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
3Exact 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
4Exact 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
5Exact matchLos Angeles, CA, United StatesHQ recorded Nov 6, 2026201-500165 contacts →

Exact match

“Smith-Emery has been providing inspection and materials testing services for public agencies and private companies for the past 113 years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchSouth Plainfield, NJ, United StatesHQ recorded Nov 6, 2026201-500122 contacts →

Exact match

“AEIS, LLC is a testing, inspection, and certification (TIC) agency that increases quality and safety outcomes for major infrastructure.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchSpringville, NY, United StatesHQ recorded Nov 6, 202651-20098 contacts →

Exact match

“Encorus Group, founded in 1996, employs over 100 engineers, architects, technicians, inspectors, and support staff across New York State.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact 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
9Exact matchSyracuse, NY, United StatesHQ recorded Nov 6, 202651-20085 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchMorton, IL, United StatesHQ recorded Nov 6, 202651-20074 contacts →

Exact match

“Millennia Professional Services, Ltd, is committed to providing high quality engineering and construction material testing services to both our public and private sector clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchAvenel, NJ, United StatesHQ recorded Nov 6, 2026201-50064 contacts →

Exact match

“Atlantic Engineering Laboratories Inc.(AEL) is a full service inspection and materials testing firm providing on-site quality control and quality assurance services during all…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact 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
13Exact 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
14Exact matchBothell, WA, United StatesHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“Located in Bothell, Washington, HWA GeoSciences Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchDelray Beach, United StatesHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“Pacifica Engineering Services (PACIFICA) is a multi-disciplined engineering consulting firm specializing in private provider, geotechnical engineering, construction material…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchReno, NV, United StatesHQ recorded Nov 6, 202651-20050 contacts →

Exact match

“For more than 40 years, CME has been northern Nevada’s trusted project partner from planning through construction.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchLatrobe, PA, United StatesHQ recorded Nov 6, 202651-20050 contacts →

Exact match

“PES is an independent testing laboratory, specializing in mechanical, metallurgical, chemical and nondestructive testing and analysis.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact 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
19Exact matchPelham, NY, United StatesHQ recorded Nov 6, 202651-20047 contacts →

Exact match

“COLE TECHNOLOGIES GROUP (CTG) is currently in its twenty-ninth (29th) year of delivering outstanding and award-winning special inspections and materials testing services to some…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact 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
21Exact 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
22Exact matchLivonia, MI, United StatesHQ recorded Nov 6, 202651-20044 contacts →

Exact match

“For over 30 years, industry has been relying on RTI Laboratories as an analytical resource.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact 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
24Exact 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
25Exact matchJacksonville, FL, United StatesHQ recorded Nov 6, 202651-20041 contacts →

Exact match

“Legacy Engineering was founded in 2005 by John E.”

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

Showing 25 of 218 aggregate testing labs based in the United States

See the full list, filter by size, metro and specialty, and access 1,936 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Aggregate testing labs based in the United States at a glance

As of Nov 6, 2026
38.2%Verified-email coverage
23.2Average contacts per company
11-50Median size (employees)
4.6%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
73
11-50
93
51-200
40
201-500
7
1,001-5,000
3
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 218 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 “aggregate testing labs” 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 1,936 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 “aggregate testing labs”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many aggregate testing labs are there based in the United States?

RevenueBase identified 218 company matches for aggregate testing labs 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?

Professional Service Industries, Inc. PSI tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most aggregate testing labs?

Houston leads with 10 company records, followed by Dallas (4) and Arlington Heights (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 1,936 professional contacts with verified work emails tracked across these 218 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.

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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.