Company lists · Data refreshed September 2026

Top 25 Industrial hygiene consultants based in the United States

Name: Industrial hygiene consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,076 companies tracked

RevenueBase identified 1,076 industrial hygiene consultants headquartered in the United States as of September 2026 and tracks 13,409 professional contacts across them, including 4,925 with verified work emails. Houston is the largest hub.

This list covers industrial hygiene consultants headquartered in the United States, 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 17, 2026.

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 17, 2026 86% judged on-target in blind review

1,076Companies

13,409Contacts tracked

4,925Verified emails

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The 25 largest industrial hygiene consultants based in the United States

Ranked by team size

Top 25 of 1,076 industrial hygiene consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to industrial hygiene consultants: 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	Antea Group USA	Indirect evidence	St Paul, MN, United StatesHQ checked Sep 17, 2026	1,001-5,000	658 contacts →
	Indirect evidence “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Source: RevenueBase Database · checked Sep 17, 2026
2	Ensafe	Indirect evidence	Memphis, TN, United StatesHQ checked Sep 17, 2026	201-500	463 contacts →
	Indirect evidence “Innovation is not happenstance at EnSafe Inc.” Source: RevenueBase Database · checked Sep 17, 2026
3	All4	Indirect evidence	Kimberton, PA, United StatesHQ checked Sep 17, 2026	201-500	331 contacts →
	Indirect evidence “ALL4 is a global consulting firm committed to shaping a sustainable future through innovative environmental, health, and safety (EHS) and digital solutions.” Source: RevenueBase Database · checked Sep 17, 2026
4	Hillmann Consulting, LLC	Partial evidence	Union, NJ, United StatesHQ checked Sep 17, 2026	201-500	209 contacts →
	Partial evidence “Hillmann has been a well-recognized leader in the Environmental Health & Safety, Due Diligence & Remediation Management, and Construction Services industries since 1985.” Source: RevenueBase Database · checked Sep 17, 2026
5	Forensic Analytical Consulting Services, INC	Indirect evidence	Hayward, CA, United StatesHQ checked Sep 17, 2026	51-200	172 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
6	Environmental Health & Engineering	Indirect evidence	Newton, MA, United StatesHQ checked Sep 17, 2026	51-200	170 contacts →
	Indirect evidence “EH & E delivers integrated environmental, engineering, and health and safety solutions that help businesses and institutions safeguard their assets, improve operations and boost…” Source: RevenueBase Database · checked Sep 17, 2026
7	Keramida INC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 17, 2026	51-200	152 contacts →
	Indirect evidence “Founded in 1988, KERAMIDA is a multidisciplinary Sustainability, EHS & Engineering consulting firm grounded in evidence-based research and development.” Source: RevenueBase Database · checked Sep 17, 2026
8	Ensolum, LLC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 17, 2026	51-200	136 contacts →
	Indirect evidence “OUR MISSION is to combine sustainable environmental solutions with forward-thinking, cost-effective, innovative, and value-added technologies that balance our clients’ economic…” Source: RevenueBase Database · checked Sep 17, 2026
9	The EI Group, INC	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 17, 2026	51-200	111 contacts →
	Indirect evidence “The EI Group, Inc.(EI) is an environmental, health and safety consulting firm headquartered in Research Triangle Park, North Carolina, with branch offices strategically located…” Source: RevenueBase Database · checked Sep 17, 2026
10	American Industrial Hygiene Association Aiha	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 17, 2026	11-50	108 contacts →
	Indirect evidence “Founded in 1939, AIHA is a nonprofit organization serving professionals dedicated to the anticipation, recognition, evaluation, control, and confirmation of environmental…” Source: RevenueBase Database · checked Sep 17, 2026
11	Fire & Risk Alliance, LLC	Indirect evidence	Washington Dc, MD, United StatesHQ checked Sep 17, 2026	51-200	106 contacts →
	Indirect evidence “The Fire & Risk Alliance was created under four basic principles: TRUST – To be our clients trusted partner in maintaining and improving safety.” Source: RevenueBase Database · checked Sep 17, 2026
12	Citadel EHS	Indirect evidence	Glendale, CA, United StatesHQ checked Sep 17, 2026	51-200	102 contacts →
	Indirect evidence “Founded in 1993, Citadel EHS provides comprehensive environmental, health, safety, and sustainability consulting solutions to meet the needs of both the public and private sectors.” Source: RevenueBase Database · checked Sep 17, 2026
13	Amerisafe Group	Indirect evidence	Greensburg, PA, United StatesHQ checked Sep 17, 2026	51-200	99 contacts →
	Indirect evidence “With offices in Pittsburgh, Roselle, and Chicago, Amerisafe Group, offers full-service safety consulting, training, rescue, and occupational health services for all types of…” Source: RevenueBase Database · checked Sep 17, 2026
14	A-Tech Consulting, INC	Indirect evidence	Orange, CA, United StatesHQ checked Sep 17, 2026	51-200	97 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
15	BBJ Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	97 contacts →
	Indirect evidence “BBJ provides clients with solutions to environmental, health and safety problems.” Source: RevenueBase Database · checked Sep 17, 2026
16	SKC INC	Strong evidence	Eighty Four, PA, United StatesHQ checked Sep 17, 2026	51-200	95 contacts →
	Strong evidence “SKC is a well-known and respected leader in industrial hygiene and occupational safety.” Source: RevenueBase Database · checked Sep 17, 2026
17	Banda Group International, LLC	Indirect evidence	Mesa, AZ, United StatesHQ checked Sep 17, 2026	51-200	93 contacts →
	Indirect evidence “Banda Group International (BGI), LLC is a world class technical and project management support services company serving government and private sector clients around the globe.” Source: RevenueBase Database · checked Sep 17, 2026
18	Yorke Engineering, LLC	Strong evidence	San Juan Capistrano, CA, United StatesHQ checked Sep 17, 2026	51-200	92 contacts →
	Strong evidence “Yorke Engineering, LLC (Yorke) was founded in 1996 and specializes in air quality, waste, storm water and industrial hygiene/safety services.” Source: RevenueBase Database · checked Sep 17, 2026
19	Envirocheck, INC	Indirect evidence	Orange, CA, United StatesHQ checked Sep 17, 2026	51-200	91 contacts →
	Indirect evidence “Founded in 1998, ENVIROCHECK, INC.” Source: RevenueBase Database · checked Sep 17, 2026
20	GLE Associates, INC	Strong evidence	Tampa, FL, United StatesHQ checked Sep 17, 2026	51-200	88 contacts →
	Strong evidence “GLE Associates is an environmental, facilities, industrial hygiene, and construction consulting firm, headquartered in Tampa, Florida, with offices throughout Florida and the…” Source: RevenueBase Database · checked Sep 17, 2026
21	Diversified Safety Services, LLC	Indirect evidence	Rosedale, MD, United StatesHQ checked Sep 17, 2026	51-200	88 contacts →
	Indirect evidence “Diversified Safety Services is a third-party safety consulting firm.” Source: RevenueBase Database · checked Sep 17, 2026
22	Mabbett & Associates, INC	Indirect evidence	Stoneham, MA, United StatesHQ checked Sep 17, 2026	51-200	79 contacts →
	Indirect evidence “Established in 1980, Mabbett & Associates, Inc.(Mabbett) is a recognized leader in delivering comprehensive environmental, health, and safety consulting and engineering services.” Source: RevenueBase Database · checked Sep 17, 2026
23	ISI Environmental	Partial evidence	Wichita, KS, United StatesHQ checked Sep 17, 2026	51-200	79 contacts →
	Partial evidence “iSi provides environmental, health and safety facility support services to a wide variety of industries across the U.S.” Source: RevenueBase Database · checked Sep 17, 2026
24	Occupational Services, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	11-50	74 contacts →
	Indirect evidence “Occupational Services, Incorporated is a San Diego-based professional consulting firm providing services in the areas of environmental compliance, occupational health and safety…” Source: RevenueBase Database · checked Sep 17, 2026
25	Wise Safety & Environmental	Indirect evidence	St. Louis, MO, United StatesHQ checked Sep 17, 2026	51-200	74 contacts →
	Indirect evidence “Wise Safety & Environmental consists of Wise El Santo Co.” Source: RevenueBase Database · checked Sep 17, 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: industrial hygiene consultants. 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 industrial hygiene consultants.
Partial evidence: Its own public description names part of industrial hygiene consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial hygiene consultants. 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 1,076 industrial hygiene consultants based in the United States

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Industrial hygiene consultants based in the United States at a glance

As of Sep 17, 2026

36.7%Verified-email coverage

12.5Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

648

11-50

328

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,076 companies.

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 industrial hygiene consultants, 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “industrial hygiene consultants”. 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 industrial hygiene consultants), 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 industrial hygiene consultants, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 4,925 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 17, 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.

Industrial hygiene consultants by metro

Industrial hygiene consultants in Houston27

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 industrial hygiene consultants, 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 industrial hygiene consultants are there based in the United States?

RevenueBase identified 1,076 industrial hygiene consultants headquartered in the United States 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?

Antea Group USA, headquartered in St Paul, tops this list with the largest team on record.

Which city has the most industrial hygiene consultants?

Houston leads with 27 headquartered companies, followed by New York (14) and Chicago (12).

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 4,925 verified decision-maker contacts tracked across these 1,076 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 17, 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.