Company lists · Data refreshed September 2026

Top 25 Environmental compliance services for energy based in the United States

RevenueBase identified 3,050 environmental compliance services for energy headquartered in the United States as of September 2026 and tracks 61,764 professional contacts across them, including 27,370 with verified work emails. Houston is the largest hub.

This list covers environmental compliance services for energy 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 16, 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 16, 2026 86% judged on-target in blind review
3,050Companies
61,764Contacts tracked
27,370Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest environmental compliance services for energy based in the United States

Ranked by team size
Top 25 of 3,050 environmental compliance services for energy based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to environmental compliance services for energy: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceAustin, TX, United StatesHQ checked Sep 16, 20261,001-5,0002,121 contacts →

Partial evidence

“CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.”

Source: RevenueBase Database · checked Sep 16, 2026
2Partial evidencePhoenix, AZ, United StatesHQ checked Sep 16, 20261,001-5,0001,629 contacts →

Partial evidence

“Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.”

Source: RevenueBase Database · checked Sep 16, 2026
3Partial evidenceLittle Rock, AR, United StatesHQ checked Sep 16, 20261,001-5,0001,529 contacts →

Partial 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 16, 2026
4Indirect evidenceTorrance, CA, United StatesHQ checked Sep 16, 20261,001-5,0001,358 contacts →

Indirect evidence

“Partner Assessment Corp.”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceRockville, MD, United StatesHQ checked Sep 16, 20261,001-5,0001,137 contacts →

Indirect evidence

“Who is Apex?”

Source: RevenueBase Database · checked Sep 16, 2026
6Partial evidenceMinneapolis, MN, United StatesHQ checked Sep 16, 20261,001-5,0001,088 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 16, 2026
7Strong evidenceDallas, TX, United StatesHQ checked Sep 16, 20261,001-5,000961 contacts →

Strong 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 16, 2026
8Partial evidenceDecatur, AL, United StatesHQ checked Sep 16, 20261,001-5,000956 contacts →

Partial 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 16, 2026
9Indirect evidenceLafayette, LA, United StatesHQ checked Sep 16, 20261,001-5,000865 contacts →

Indirect evidence

“ATC Group Services LLC is now Atlas.”

Source: RevenueBase Database · checked Sep 16, 2026
10Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 16, 2026501-1,000732 contacts →

Partial evidence

“ESA is a 100% employee-owned environmental consulting firm.”

Source: RevenueBase Database · checked Sep 16, 2026
11Partial evidenceSt Paul, MN, United StatesHQ checked Sep 16, 20261,001-5,000658 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 16, 2026
12Indirect evidenceBurlington, MA, United StatesHQ checked Sep 16, 2026501-1,000535 contacts →

Indirect evidence

“For 35 years we have been helping investors, lenders, owners, developers, contractors, and property managers reduce risk and optimize their built facilities, infrastructure and…”

Source: RevenueBase Database · checked Sep 16, 2026
13Partial evidenceHouston, TX, United StatesHQ checked Sep 16, 20261,001-5,000481 contacts →

Partial evidence

“At VLS, we address your company’s most significant hurdles with waste management and compliance through sustainable solutions.”

Source: RevenueBase Database · checked Sep 16, 2026
14Partial evidenceVentura, CA, United StatesHQ checked Sep 16, 2026501-1,000479 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 16, 2026
15Indirect evidenceMemphis, TN, United StatesHQ checked Sep 16, 2026201-500463 contacts →

Indirect evidence

“Innovation is not happenstance at EnSafe Inc.”

Source: RevenueBase Database · checked Sep 16, 2026
16Partial evidenceWall Township, NJ, United StatesHQ checked Sep 16, 2026201-500447 contacts →

Partial evidence

“We are Groundwater & Environmental Services, Inc, better known as GES.”

Source: RevenueBase Database · checked Sep 16, 2026
17Strong evidenceHouston, United StatesHQ checked Sep 16, 2026501-1,000442 contacts →

Strong evidence

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

Source: RevenueBase Database · checked Sep 16, 2026
18Partial evidenceIslandia, NY, United StatesHQ checked Sep 16, 2026201-500433 contacts →

Partial evidence

“Founded 40 years ago, Roux is recognized for being a highly effective, client-focused environmental consulting and management firm.”

Source: RevenueBase Database · checked Sep 16, 2026
19Partial evidenceIrvine, CA, United StatesHQ checked Sep 16, 2026201-500383 contacts →

Partial evidence

“We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.”

Source: RevenueBase Database · checked Sep 16, 2026
20Partial evidenceKimberton, PA, United StatesHQ checked Sep 16, 2026201-500331 contacts →

Partial 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 16, 2026
21Partial evidenceGainesville, FL, United StatesHQ checked Sep 16, 2026201-500305 contacts →

Partial evidence

Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…”

Source: RevenueBase Database · checked Sep 16, 2026
22Partial evidencePortland, OR, United StatesHQ checked Sep 16, 2026201-500288 contacts →

Partial evidence

“At Cascade Energy, we believe in better.”

Source: RevenueBase Database · checked Sep 16, 2026
23Strong evidenceMinneapolis, MN, United StatesHQ checked Sep 16, 2026201-500264 contacts →

Strong evidence

“Merjent is an environmental, restoration, and engineering consulting firm with a long history serving the energy industry.”

Source: RevenueBase Database · checked Sep 16, 2026
24Strong evidenceSt. Louis Park, MN, United StatesHQ checked Sep 16, 2026201-500264 contacts →

Strong evidence

“Nova Group, GBC is an international, multidisciplinary advising firm providing environmental, engineering and energy services throughout North America and around the globe.”

Source: RevenueBase Database · checked Sep 16, 2026
25Partial evidenceHouston, TX, United StatesHQ checked Sep 16, 2026201-500259 contacts →

Partial evidence

“GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 3,050 environmental compliance services for energy based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 27,370 reachable decision-makers.

Free signup · no credit card

View the full list →

Environmental compliance services for energy based in the United States at a glance

As of Sep 16, 2026
44.3%Verified-email coverage
20.3Average contacts per company
1-10Median size (employees)
2.8%Largest-city concentration · Houston
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
1,608
11-50
1,076
51-200
274
201-500
52
501-1,000
14
1,001-5,000
20
5,001-10,000
1
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 3,050 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 environmental compliance services for energy, 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 “environmental compliance services for energy”. 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 environmental compliance services for energy), 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 environmental compliance services for energy, 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, 27,370 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 16, 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 environmental compliance services for energy, 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 environmental compliance services for energy are there based in the United States?

RevenueBase identified 3,050 environmental compliance services for energy 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?

Clearesult, headquartered in Austin, tops this list with the largest team on record.

Which city has the most environmental compliance services for energy?

Houston leads with 84 headquartered companies, followed by New York (55) and Austin (41).

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 27,370 verified decision-maker contacts tracked across these 3,050 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 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 3,050 environmental compliance services for energy based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

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.