Company lists · Data refreshed September 2026

Top 25 Remediation consulting firms worldwide

Name: Remediation consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 10,323 companies tracked

RevenueBase identified 10,323 remediation consulting firms worldwide as of September 2026 and tracks 143,339 professional contacts across them, including 50,120 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers remediation consulting firms worldwide, 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 29, 2026. Country and city lists for remediation consulting firms follow the table.

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 29, 2026 86% judged on-target in blind review

10,323Companies

143,339Contacts tracked

50,120Verified emails

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The 25 largest remediation consulting firms worldwide

Ranked by team size

Top 25 of 10,323 remediation consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to remediation consulting firms: 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	Clean Harbors	Indirect evidence	Norwell, MA, United StatesHQ checked Sep 29, 2026	10001+	8,924 contacts →
	Indirect evidence “Clean Harbors is North America’s leading provider of environmental and industrial services.” Source: RevenueBase Database · checked Sep 29, 2026
2	Golder	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 29, 2026	5,001-10,000	3,167 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 29, 2026
3	Montrose Environmental Group	Indirect evidence	Little Rock, AR, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,529 contacts →
	Indirect evidence “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Source: RevenueBase Database · checked Sep 29, 2026
4	Weston Solutions, INC	Indirect evidence	West Chester, PA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,441 contacts →
	Indirect evidence “Weston Solutions, Inc.(Weston) is a 100% employee-owned environmental and infrastructure services firm committed to safety and providing measurable client value.” Source: RevenueBase Database · checked Sep 29, 2026
5	DGE Danmark	Indirect evidence	Højbjerg, DenmarkHQ checked Sep 29, 2026	n/a	1,176 contacts →
	Indirect evidence “Miljø er vores kernekompetence og vores ansvar.” Source: RevenueBase Database · checked Sep 29, 2026
6	Verdantas	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,139 contacts →
	Indirect evidence “At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Source: RevenueBase Database · checked Sep 29, 2026
7	Apex Companies	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,137 contacts →
	Indirect evidence “Who is Apex?” Source: RevenueBase Database · checked Sep 29, 2026
8	Barr Engineering CO	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,088 contacts →
	Partial evidence “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Source: RevenueBase Database · checked Sep 29, 2026
9	Trinity Consultants	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	961 contacts →
	Indirect evidence “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Source: RevenueBase Database · checked Sep 29, 2026
10	Alliance Technical Group	Indirect evidence	Decatur, AL, United StatesHQ checked Sep 29, 2026	1,001-5,000	956 contacts →
	Indirect evidence “Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.” Source: RevenueBase Database · checked Sep 29, 2026
11	Pinchin In Canada	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 29, 2026	1,001-5,000	895 contacts →
	Indirect evidence “Pinchin Ltd.” Source: RevenueBase Database · checked Sep 29, 2026
12	ATC Group Services LLC	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 29, 2026	1,001-5,000	865 contacts →
	Indirect evidence “ATC Group Services LLC is now Atlas.” Source: RevenueBase Database · checked Sep 29, 2026
13	Pares&alvarez	Partial evidence	Santiago, ChileHQ checked Sep 29, 2026	501-1,000	807 contacts →
	Partial evidence “We are Pares & Alvarez, our extensive experience and the recognition of our clients makes us one of the leading Engineering Companies in environmental, consulting, engineering and…” Source: RevenueBase Database · checked Sep 29, 2026
14	Environmental Science Associates	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	501-1,000	732 contacts →
	Partial evidence “ESA is a 100% employee-owned environmental consulting firm.” Source: RevenueBase Database · checked Sep 29, 2026
15	Antea Group USA	Partial evidence	St Paul, MN, United StatesHQ checked Sep 29, 2026	1,001-5,000	658 contacts →
	Partial 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 29, 2026
16	Trihydro Corporation	Partial evidence	Laramie, WY, United StatesHQ checked Sep 29, 2026	501-1,000	577 contacts →
	Partial evidence “Headquartered in Laramie, Wyoming, Trihydro provides environmental consulting, engineering and surveying, air quality and process management, information technology, and water and…” Source: RevenueBase Database · checked Sep 29, 2026
17	ENI Rewind	Indirect evidence	San Donato Milanese, ItalyHQ checked Sep 29, 2026	1,001-5,000	543 contacts →
	Indirect evidence “We are Eni’s environmental company active for over 20 years, in giving new life, according to the principles of the circular economy, to industrial land, water and waste through…” Source: RevenueBase Database · checked Sep 29, 2026
18	CTA Engenharia	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 29, 2026	201-500	540 contacts →
	Indirect evidence “A CTA foi criada em 1995, em Belo Horizonte Minas Gerais, ampliando sua atividade e posicionando sua sede no estado do Rio de Janeiro em Duque de Caxias, próximo ao Pólo…” Source: RevenueBase Database · checked Sep 29, 2026
19	Vital Engenharia Ambiental	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 29, 2026	5,001-10,000	500 contacts →
	Indirect evidence “Vital Engenharia Ambiental is an environmental services company based out of R Santa Luzia, 651, 21 Andar Parte, Rio De Janeiro, Rio De Janeiro, Brazil.” Source: RevenueBase Database · checked Sep 29, 2026
20	LX Argentina S.A	Indirect evidence	Ciudad Autónoma De Buenos Aires, ArgentinaHQ checked Sep 29, 2026	1,001-5,000	484 contacts →
	Indirect evidence “We are a company that provides industrial cleaning, maintenance and induatrial hygiene.” Source: RevenueBase Database · checked Sep 29, 2026
21	Entact, LLC	Partial evidence	Westmont, IL, United StatesHQ checked Sep 29, 2026	501-1,000	483 contacts →
	Partial evidence “ENTACT is the partner of choice in solving our customer's most complex environmental remediation and geotechnical infrastructure challenges.” Source: RevenueBase Database · checked Sep 29, 2026
22	Anchor QEA	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	501-1,000	479 contacts →
	Partial evidence “Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Source: RevenueBase Database · checked Sep 29, 2026
23	Rincon Consultants	Partial evidence	Ventura, CA, United StatesHQ checked Sep 29, 2026	501-1,000	479 contacts →
	Partial evidence “Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Source: RevenueBase Database · checked Sep 29, 2026
24	Vertex Resource Group LTD	Indirect evidence	Sherwood Park, AB, CanadaHQ checked Sep 29, 2026	1,001-5,000	471 contacts →
	Indirect evidence “Since 1962, Vertex has been a leading North American provider of environmental services.” Source: RevenueBase Database · checked Sep 29, 2026
25	Ensafe	Indirect evidence	Memphis, TN, United StatesHQ checked Sep 29, 2026	201-500	463 contacts →
	Indirect evidence “Innovation is not happenstance at EnSafe Inc.” Source: RevenueBase Database · checked Sep 29, 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: remediation consulting firms. 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 remediation consulting firms.
Partial evidence: Its own public description names part of remediation consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name remediation consulting firms. 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 10,323 remediation consulting firms worldwide

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Remediation consulting firms worldwide at a glance

As of Sep 29, 2026

35.0%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

5,670

11-50

3,358

51-200

933

201-500

195

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 remediation consulting firms, 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.
Coverage: Every country. Country and city lists for remediation consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “remediation consulting firms”. 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 remediation consulting firms), 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 remediation consulting firms, and records with no verified work email.
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, 50,120 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 29, 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.

Remediation consulting firms by location

40 lists · largest first

Every Remediation consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 remediation consulting firms, 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 remediation consulting firms are there worldwide?

RevenueBase identified 10,323 remediation consulting firms worldwide 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?

Clean Harbors, headquartered in Norwell, tops this list with the largest team on record.

Which country has the most remediation consulting firms?

The United States leads with 3,774 companies, followed by Brazil (1,231) and Canada (493). Every remediation consulting firms list by country and city is linked on this page.

Which city has the most remediation consulting firms?

Sao Paulo leads with 154 headquartered companies, followed by Houston (76) and Calgary (67).

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 50,120 verified decision-maker contacts tracked across these 10,323 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 29, 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.