Company lists · Data refreshed September 2026

Top 25 Hazard assessment companies based in the United States

Name: Hazard assessment companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 601 companies tracked

RevenueBase identified 601 hazard assessment companies headquartered in the United States as of September 2026 and tracks 5,535 professional contacts across them, including 2,014 with verified work emails. Houston is the largest hub.

This list covers hazard assessment companies 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 20, 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 20, 2026 86% judged on-target in blind review

601Companies

5,535Contacts tracked

2,014Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest hazard assessment companies based in the United States

Ranked by team size

Top 25 of 601 hazard assessment companies based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to hazard assessment companies: 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	Hillmann Consulting, LLC	Indirect evidence	Union, NJ, United StatesHQ checked Sep 20, 2026	201-500	209 contacts →
	Indirect 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 20, 2026
2	Bakerrisk	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 20, 2026	201-500	202 contacts →
	Indirect evidence “Risk Management.” Source: RevenueBase Database · checked Sep 20, 2026
3	Forensic Analytical Consulting Services, INC	Indirect evidence	Hayward, CA, United StatesHQ checked Sep 20, 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 20, 2026
4	Environmental Health & Engineering	Indirect evidence	Newton, MA, United StatesHQ checked Sep 20, 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 20, 2026
5	Yorke Engineering, LLC	Indirect evidence	San Juan Capistrano, CA, United StatesHQ checked Sep 20, 2026	51-200	92 contacts →
	Indirect 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 20, 2026
6	Diversified Safety Services, LLC	Indirect evidence	Rosedale, MD, United StatesHQ checked Sep 20, 2026	51-200	88 contacts →
	Indirect evidence “Diversified Safety Services is a third-party safety consulting firm.” Source: RevenueBase Database · checked Sep 20, 2026
7	Occupational Services, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 20, 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 20, 2026
8	IES Safety, LLC	Indirect evidence	Louisville, KY, United StatesHQ checked Sep 20, 2026	201-500	65 contacts →
	Indirect evidence “IES Safety, LLC delivers expert occupational safety and health consulting through seasoned professionals who help clients proactively manage risk and maintain regulatory…” Source: RevenueBase Database · checked Sep 20, 2026
9	Risk Logic INC	Indirect evidence	Woodcliff Lake, NJ, United StatesHQ checked Sep 20, 2026	201-500	63 contacts →
	Indirect evidence “Risk Logic Inc.® (RLI) is a consulting engineering company that provides Property Loss Prevention Services.” Source: RevenueBase Database · checked Sep 20, 2026
10	Accurate Safety Compliance	Indirect evidence	Oklahoma City, OK, United StatesHQ checked Sep 20, 2026	51-200	60 contacts →
	Indirect evidence “We are a © 2026 Full-Spectrum Safety Company with six departments; Consulting, Supplies, Training, Industrial Hygiene, Technology, and Media!” Source: RevenueBase Database · checked Sep 20, 2026
11	Safex INC	Indirect evidence	Westerville, OH, United StatesHQ checked Sep 20, 2026	11-50	57 contacts →
	Indirect evidence “We are committed to the total wellbeing of your employees.” Source: RevenueBase Database · checked Sep 20, 2026
12	Sitex, INC	Indirect evidence	St. Louis, MO, United StatesHQ checked Sep 20, 2026	51-200	54 contacts →
	Indirect evidence “A full-service provider of industrial and environmental health & safety services SITEX saves lives.” Source: RevenueBase Database · checked Sep 20, 2026
13	Colden Corporation	Indirect evidence	Blue Bell, PA, United StatesHQ checked Sep 20, 2026	11-50	52 contacts →
	Indirect evidence “Founded in 1996, Colden Corporation helps clients create and maintain safe and healthy workplaces.” Source: RevenueBase Database · checked Sep 20, 2026
14	Pilko & Associates	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	11-50	50 contacts →
	Indirect evidence “We are the trusted Advisor to corporate officers and boards on mitigating Operational/EHS Risks and unlocking value for global energy, chemical and industrial companies.” Source: RevenueBase Database · checked Sep 20, 2026
15	International Safety Systems, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	11-50	46 contacts →
	Indirect evidence “International Safety Systems, Inc.(ISS) is a consulting company providing cost effective and high quality industrial hygiene and safety services to 35+ countries from its offices…” Source: RevenueBase Database · checked Sep 20, 2026
16	HETI	Indirect evidence	Acton, MA, United StatesHQ checked Sep 20, 2026	51-200	45 contacts →
	Indirect evidence “HETI is an internationally-prominent, multi-disciplinary, full-service Environmental Health & Safety and Risk Management consulting company.” Source: RevenueBase Database · checked Sep 20, 2026
17	MHD	Indirect evidence	Broomfield, CO, United StatesHQ checked Sep 20, 2026	11-50	45 contacts →
	Indirect evidence “We help you stay OSHA compliant and keep your employees safe with on-site occupational health, safety, and industrial hygiene services including: Audiometric Hearing Tests…” Source: RevenueBase Database · checked Sep 20, 2026
18	Provenance Consulting	Indirect evidence	Borger, TX, United StatesHQ checked Sep 20, 2026	51-200	43 contacts →
	Indirect evidence “Provenance Consulting is now a part of Trinity Consultants.” Source: RevenueBase Database · checked Sep 20, 2026
19	ACC Environmental Consultants	Indirect evidence	Oakland, CA, United StatesHQ checked Sep 20, 2026	51-200	41 contacts →
	Indirect evidence “Established in 1986, ACC Environmental Consultants, Inc.(ACC) is an employee-owned full service environmental consulting and design firm recognized for its excellent and reliable…” Source: RevenueBase Database · checked Sep 20, 2026
20	Titan Environmental Solutions, INC	Indirect evidence	Fullerton, CA, United StatesHQ checked Sep 20, 2026	11-50	41 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
21	Med-Tex Services, INC	Indirect evidence	Penns Park, PA, United StatesHQ checked Sep 20, 2026	51-200	40 contacts →
	Indirect evidence “About Med-Tex Med-Tex Services, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
22	Airquest Environmental, INC	Indirect evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 20, 2026	11-50	37 contacts →
	Indirect evidence “AirQuest Environmental, Inc.("AirQuest") solves environmental, health, and safety problems, improving the air quality, health of your workforce, and the value of your buildings.” Source: RevenueBase Database · checked Sep 20, 2026
23	Clark Seif Clark, Inc. CSC , A Part Of J.S. Held	Indirect evidence	Chatsworth, CA, United StatesHQ checked Sep 20, 2026	11-50	35 contacts →
	Indirect evidence “The science, safety, and engineering professionals at CSC possess extensive experience delivering wide ranges of environmental consulting and industrial hygiene (IH) services…” Source: RevenueBase Database · checked Sep 20, 2026
24	Osha Environmental Compliance Systems Oecs	Indirect evidence	St Louis Park, MN, United StatesHQ checked Sep 20, 2026	11-50	34 contacts →
	Indirect evidence “Founded in 1993, the primary mission of OSHA + Environmental Compliance Systems (OECS) is to provide OSHA, IH, and environmental compliance services to companies that do not have…” Source: RevenueBase Database · checked Sep 20, 2026
25	Aquionix, INC	Indirect evidence	Lakewood, CO, United StatesHQ checked Sep 20, 2026	11-50	33 contacts →
	Indirect evidence “Aquionix is an environmental and safety services company that is dedicated to assisting companies in their effort to meet the ever increasing demands of today's business and…” Source: RevenueBase Database · checked Sep 20, 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: hazard assessment companies. 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 hazard assessment companies.
Partial evidence: Its own public description names part of hazard assessment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hazard assessment companies. 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 601 hazard assessment companies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,014 reachable decision-makers.

Free signup · no credit card

View the full list →

Hazard assessment companies based in the United States at a glance

As of Sep 20, 2026

36.4%Verified-email coverage

9.2Average contacts per company

1-10Median size (employees)

3.3%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

387

11-50

173

51-200

201-500

501-1,000

1,001-5,000

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 601 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 hazard assessment companies, 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 “hazard assessment companies”. 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 hazard assessment companies), 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 hazard assessment companies, 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, 2,014 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 20, 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.

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 hazard assessment companies, 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 hazard assessment companies are there based in the United States?

RevenueBase identified 601 hazard assessment companies 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?

Hillmann Consulting, LLC, headquartered in Union, tops this list with the largest team on record.

Which city has the most hazard assessment companies?

Houston leads with 20 headquartered companies, followed by Denver (10) and Tampa (8).

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 2,014 verified decision-maker contacts tracked across these 601 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 601 hazard assessment companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Hazard assessment companies by geography

Browse the directory

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.