Company lists · Data refreshed October 2026

Top 25 Industrial compliance auditing firms based in the United States

RevenueBase identified 1,020 company matches for industrial compliance auditing firms associated with the United States as of October 2026 and tracks 14,205 professional contacts across them, including 6,074 with verified work emails. Houston is the largest hub.

This list covers company matches for industrial compliance auditing firms 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 October 16, 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 Oct 16, 2026 How this list was built
1,020Companies
14,205Contacts tracked
6,074Verified emails
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The 25 largest industrial compliance auditing firms based in the United States

Ranked by team size
Top 25 of 1,020 company matches for industrial compliance auditing firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 16, 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 matchDecatur, AL, United StatesHQ recorded Oct 16, 20261,001-5,0001,048 contacts →

Exact match

“Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
2Exact matchMarietta, GA, United StatesHQ recorded Oct 16, 20261,001-5,000922 contacts →

Exact match

“Applied Technical Services assists commercial and industrial clients by providing inspection, testing, consulting engineering, and calibration services.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
3Exact matchArlington, VA, United StatesHQ recorded Oct 16, 2026201-500478 contacts →

Exact match

“At Enhesa we empower the world’s largest businesses to achieve compliance, manage risk, and drive sustainability with clear, actionable insights.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
4Exact matchHouston, TX, United StatesHQ recorded Oct 16, 2026501-1,000476 contacts →

Exact match

“SPL is a leading provider of compliance and testing services for Environmental, Energy, and other end markets.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
5Exact matchFairfax, VA, United StatesHQ recorded Oct 16, 2026201-500425 contacts →

Exact match

“ControlCase is committed to bringing peace of mind to the world’s IT compliance programs through our signature partnership approach, commitment to automation, and cost-effective…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
6Exact matchMount Laurel, NJ, United StatesHQ recorded Oct 16, 2026201-500373 contacts →

Exact match

“APA Engineering Inc has been a leader in providing Compliance, Engineering, IT, and Sourcing services since With over twenty years in business, we are dedicated to providing the…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
7Exact matchWichita, KS, United StatesHQ recorded Oct 16, 2026501-1,000359 contacts →

Exact match

“PROtect is a leading national provider of reliability, risk, and compliance services to the refining, petrochemical, renewable fuels, manufacturing, food & beverage, fertilizer…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
8Exact matchAlpharetta, GA, United StatesHQ recorded Oct 16, 2026501-1,000221 contacts →

Exact match

“Industrial Inspection & Analysis® (IIA) is an emerging, high growth inspection, testing, and analytical business seeking to build a national platform in order to serve a breadth…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
9Exact matchMchenry, IL, United StatesHQ recorded Oct 16, 2026501-1,000208 contacts →

Exact match

“Pro QC International provides tailored quality solutions with a human touch in 100 countries.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
10Exact matchIndianapolis, IN, United StatesHQ recorded Oct 16, 202651-200194 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
11Exact matchLancaster, PA, United StatesHQ recorded Oct 16, 2026201-500174 contacts →

Exact match

“We provide innovative compliance solutions by embracing complexity and making it simple.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
12Exact matchHayward, CA, United StatesHQ recorded Oct 16, 202651-200168 contacts →

Exact match

“With a staff of over 150 employees in the San Francisco, Sacramento, Los Angeles, San Diego, Modesto, Bakersfield, Fresno, Portland, Chicago, and Grand Rapids offices, Forensic…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
13Exact matchElmhurst, IL, United StatesHQ recorded Oct 16, 202651-200160 contacts →

Exact match

“Since the passage of original environmental legislation nearly four decades ago, both private and public industry have turned to Mostardi Platt for guidance in complying with air…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
14Exact matchPalatine, IL, United StatesHQ recorded Oct 16, 202651-200152 contacts →

Exact match

“Since its founding in 1972, CleanAir has an established reputation for excellence on projects of all sizes, ranging from boiler, APC equipment and cooling tower efficiency testing…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
15Exact matchDeer Park, TX, United StatesHQ recorded Oct 16, 20261,001-5,000150 contacts →

Exact match

“QualSpec is a leading industrial inspection firm headquartered in Houston, Texas.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
16Exact matchSan Diego, CA, United StatesHQ recorded Oct 16, 202611-50129 contacts →

Exact match

“TrendSource helps businesses document and measure compliance across employment, consumer reporting, government, finance, health care, and retail.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
17Exact matchCosta Mesa, CA, United StatesHQ recorded Oct 16, 202651-200105 contacts →

Exact match

“Public agencies and businesses have been relying on Chambers Group to keep them in compliance with applicable federal, state, and/or local environmental laws, regulations, and…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
18Exact matchSan Juan Capistrano, CA, United StatesHQ recorded Oct 16, 202651-20099 contacts →

Exact match

“Yorke Engineering, LLC (Yorke) was founded in 1996 and specializes in air quality, waste, storm water and industrial hygiene/safety services.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
19Exact matchThe Woodlands, TX, United StatesHQ recorded Oct 16, 202651-20099 contacts →

Exact match

“INTERCERT is a multinational auditing company headquartered in Texas, United States operating at 28+ countries.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
20Exact matchChicago, IL, United StatesHQ recorded Oct 16, 202651-20078 contacts →

Exact match

“At GMG EnviroSafe, we work closely with businesses across the country to help them meet environmental, health and safety regulations, and reduce the spread of communicable…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
21Exact matchSpring, TX, United StatesHQ recorded Oct 16, 202651-20075 contacts →

Exact match

“Insight Environmental is an environmental consulting firm founded on education, experience, and expertise.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
22Exact matchHouston, TX, United StatesHQ recorded Oct 16, 202651-20075 contacts →

Exact match

“As a leader in the environmental compliance services industry, AARC does more than just meeting the needs of clients today.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
23Exact matchHumble, TX, United StatesHQ recorded Oct 16, 2026n/a75 contacts →

Exact match

“Fixed Equipment Reliability (FER) delivers world-class inspection services to the petrochemical industry.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
24Exact matchSan Diego, CA, United StatesHQ recorded Oct 16, 202611-5074 contacts →

Exact match

“Occupational Services, Incorporated is a San Diego-based professional consulting firm providing services in the areas of environmental compliance, occupational health and safety…”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
25Exact matchFort Collins, CO, United StatesHQ recorded Oct 16, 202651-20072 contacts →

Exact match

“We deliver quality solutions with integrity and expertise, every time.”

Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase

Showing 25 of 1,020 industrial compliance auditing firms based in the United States

See the full list, filter by size, metro and specialty, and access 6,074 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Industrial compliance auditing firms based in the United States at a glance

As of Oct 16, 2026
42.8%Verified-email coverage
13.9Average contacts per company
1-10Median size (employees)
3.6%Largest-city concentration · Houston
Oct 16, 2026Page data refreshed

Companies by employee count

1-10
612
11-50
318
51-200
71
201-500
9
501-1,000
6
1,001-5,000
3
5,001-10,000
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 1,020 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 “industrial compliance auditing firms” 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 6,074 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 October 16, 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.

Industrial compliance auditing firms 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 “industrial compliance auditing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many industrial compliance auditing firms are there based in the United States?

RevenueBase identified 1,020 company matches for industrial compliance auditing firms associated with the United States as of October 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?

Alliance Technical Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most industrial compliance auditing firms?

Houston leads with 37 company records, followed by New York (18) and Dallas (12).

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 6,074 professional contacts with verified work emails tracked across these 1,020 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 October 16, 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.