Company lists · Data refreshed September 2026

Top 25 Ecosystem assessment companies based in the United States

Name: Ecosystem 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 19, 2026 553 companies tracked

RevenueBase identified 553 ecosystem assessment companies headquartered in the United States as of September 2026 and tracks 6,568 professional contacts across them, including 3,118 with verified work emails. Houston is the largest hub.

This list covers ecosystem 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 19, 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 19, 2026 86% judged on-target in blind review

553Companies

6,568Contacts tracked

3,118Verified emails

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The 25 largest ecosystem assessment companies based in the United States

Ranked by team size

Top 25 of 553 ecosystem assessment companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to ecosystem 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	Western Ecosystems Technology, Inc. West	Indirect evidence	Cheyenne, WY, United StatesHQ checked Sep 19, 2026	201-500	408 contacts →
	Indirect evidence “WEST provides environmental and statistical consulting services and contract research nationally and internationally to industry, government, and private organizations.” Source: RevenueBase Database · checked Sep 19, 2026
2	Normandeau Associates, INC	Indirect evidence	Bedford, NH, United StatesHQ checked Sep 19, 2026	201-500	189 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
3	Enviroscience, INC	Indirect evidence	Stow, OH, United StatesHQ checked Sep 19, 2026	51-200	176 contacts →
	Indirect evidence “EnviroScience is a team of over 150 expert biologists, commercial divers, environmental engineers, and environmental scientists that provides biomonitoring, environmental…” Source: RevenueBase Database · checked Sep 19, 2026
4	Perennial Environmental Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	102 contacts →
	Indirect evidence “Perennial Environmental Services, LLC, has been providing technical environmental solutions and management with fresh perspectives and unparalleled efficiency since 2003.” Source: RevenueBase Database · checked Sep 19, 2026
5	EEE Consulting, Inc. 3e	Indirect evidence	Mechanicsville, VA, United StatesHQ checked Sep 19, 2026	11-50	101 contacts →
	Indirect evidence “Consulting, Inc.(3e) is a dynamic and progressive certified small business that specializes in environmental studies, environmental engineering, environmental education, and…” Source: RevenueBase Database · checked Sep 19, 2026
6	Cary Institute Of Ecosystem Studies	Partial evidence	Millbrook, NY, United StatesHQ checked Sep 19, 2026	51-200	98 contacts →
	Partial evidence “Founded in 1983, the Cary Institute of Ecosystem Studies is one of the world’s leading independent environmental research organizations.” Source: RevenueBase Database · checked Sep 19, 2026
7	AKT Peerless	Indirect evidence	Saginaw, MI, United StatesHQ checked Sep 19, 2026	51-200	96 contacts →
	Indirect evidence “We are environmental consultants and redevelopment experts who are proud to help build sustainable communities.” Source: RevenueBase Database · checked Sep 19, 2026
8	Aspen Environmental Group	Partial evidence	Agoura Hills, CA, United StatesHQ checked Sep 19, 2026	51-200	94 contacts →
	Partial evidence “Aspen Environmental Group is an expert interdisciplinary environmental impact analysis firm, specializing in the management of environmental assessment efforts under CEQA, NEPA…” Source: RevenueBase Database · checked Sep 19, 2026
9	Edwards-Pitman Environmental, INC	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 19, 2026	51-200	88 contacts →
	Indirect evidence “Incorporated in 1994, Edwards-Pitman Environmental, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
10	Water & AIR Research, INC	Indirect evidence	Gainesville, FL, United StatesHQ checked Sep 19, 2026	11-50	87 contacts →
	Indirect evidence “Water and Air Research, Inc.” Source: RevenueBase Database · checked Sep 19, 2026
11	Environmental Services, Inc., A Terracon Company	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 19, 2026	51-200	70 contacts →
	Indirect evidence “Environmental Services, Inc.(ESI) is a leading full service environmental consulting firm with national and international experience.” Source: RevenueBase Database · checked Sep 19, 2026
12	H. T. Harvey & Associates	Indirect evidence	Los Gatos, CA, United StatesHQ checked Sep 19, 2026	51-200	69 contacts →
	Indirect evidence “Since 1970, the highly-trained ecologists and professionals at H.” Source: RevenueBase Database · checked Sep 19, 2026
13	ERO Resources Corporation	Partial evidence	Lakewood, CO, United StatesHQ checked Sep 19, 2026	11-50	67 contacts →
	Partial evidence “We are a team of consultants who specialize in natural resource and environmental assessment, planning, and permitting.” Source: RevenueBase Database · checked Sep 19, 2026
14	GRO Intelligence	Indirect evidence	New York, United StatesHQ checked Sep 19, 2026	51-200	67 contacts →
	Indirect evidence “Gro Intelligence illuminates the interrelationships between our earth’s ecology and human economy to help you see the big picture and act on the small details.” Source: RevenueBase Database · checked Sep 19, 2026
15	Stone Environmental	Indirect evidence	Montpelier, VT, United StatesHQ checked Sep 19, 2026	51-200	65 contacts →
	Indirect evidence “Stone Environmental is a 100% employee-owned environmental science and engineering firm based in Montpelier, Vermont.” Source: RevenueBase Database · checked Sep 19, 2026
16	Summitwest Environmental, INC	Indirect evidence	Bend, OR, United StatesHQ checked Sep 19, 2026	51-200	65 contacts →
	Indirect evidence “SummitWest is an environmental consulting company that is home to a team of dynamic, solution-oriented thinkers.” Source: RevenueBase Database · checked Sep 19, 2026
17	Rescom Environmental Corp	Partial evidence	Petoskey, MI, United StatesHQ checked Sep 19, 2026	11-50	60 contacts →
	Partial evidence “RESCOM Environmental Corp (RESCOM) is a national environmental consulting firm, providing environmental, biological and cultural resource assessment services.” Source: RevenueBase Database · checked Sep 19, 2026
18	Sequoia Ecological Consulting	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 19, 2026	11-50	59 contacts →
	Indirect evidence “Founded in 2011, Sequoia is a California-based, woman-owned, small, and disadvantaged business (WBE \| SBE \| DBE) that provides environmental consulting services to public agencies…” Source: RevenueBase Database · checked Sep 19, 2026
19	LEW Environmental	Indirect evidence	Mine Hill, NJ, United StatesHQ checked Sep 19, 2026	51-200	59 contacts →
	Indirect evidence “THE ENVIRONMENTAL COMPANY LEW Environmental Services is proud to be part of the Mainline Environmental family of companies, alongside our sister organizations HSE Consulting and…” Source: RevenueBase Database · checked Sep 19, 2026
20	Ecolsciences, INC	Indirect evidence	Rockaway, United StatesHQ checked Sep 19, 2026	11-50	53 contacts →
	Indirect evidence “EcolSciences, Inc, was founded in 1973 in response to the growing need for responsible environmental planning, as mandated by NEPA, The National Environmental Policy Act.” Source: RevenueBase Database · checked Sep 19, 2026
21	Coastal Environments, INC	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 19, 2026	11-50	50 contacts →
	Indirect evidence “COASTAL ENVIRONMENTS, INC.(CEI), a Baton Rouge-based company, has provided environmental services in the areas of applied science, planning and cultural resources since 1972.” Source: RevenueBase Database · checked Sep 19, 2026
22	Environmental Assessment Services, LLC	Partial evidence	Richland, WA, United StatesHQ checked Sep 19, 2026	51-200	47 contacts →
	Partial evidence “Environmental Assessment Services, LLC (EAS) is a member of the KOMAN Family of Companies.” Source: RevenueBase Database · checked Sep 19, 2026
23	Ecological Associates INC	Indirect evidence	Jensen Beach, FL, United StatesHQ checked Sep 19, 2026	11-50	47 contacts →
	Indirect evidence “Ecological Associates, Inc.(EAI) is a multi-disciplinary environmental consulting firm headquartered in Jensen Beach, Florida.” Source: RevenueBase Database · checked Sep 19, 2026
24	Imperative	Partial evidence	Singapore, TX, United StatesHQ checked Sep 19, 2026	51-200	47 contacts →
	Partial evidence “Imperative is a large-scale ecosystem restoration company.” Source: RevenueBase Database · checked Sep 19, 2026
25	Copperhead Environmental Consulting, INC	Indirect evidence	Paint Lick, KY, United StatesHQ checked Sep 19, 2026	11-50	46 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 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: ecosystem 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 ecosystem assessment companies.
Partial evidence: Its own public description names part of ecosystem assessment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name ecosystem 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 553 ecosystem assessment companies based in the United States

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Ecosystem assessment companies based in the United States at a glance

As of Sep 19, 2026

47.5%Verified-email coverage

11.9Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

316

11-50

192

51-200

201-500

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 553 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 ecosystem 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 “ecosystem 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 ecosystem 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 ecosystem 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, 3,118 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 19, 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 ecosystem 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 ecosystem assessment companies are there based in the United States?

RevenueBase identified 553 ecosystem 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?

Western Ecosystems Technology, Inc. West, headquartered in Cheyenne, tops this list with the largest team on record.

Which city has the most ecosystem assessment companies?

Houston leads with 11 headquartered companies, followed by Austin (8) and New York (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 3,118 verified decision-maker contacts tracked across these 553 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 19, 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.