Company lists · Data refreshed September 2026
Top 25 Ecosystem restoration contractors based in the United States
RevenueBase identified 824 ecosystem restoration contractors headquartered in the United States as of September 2026 and tracks 12,404 professional contacts across them, including 5,732 with verified work emails. Portland is the largest hub.
This list covers ecosystem restoration contractors 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.
The 25 largest ecosystem restoration contractors based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 732 contacts → | ||||
Indirect evidence “ESA is a 100% employee-owned environmental consulting firm.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 677 contacts → | ||||
Indirect evidence “As the nation’s largest nature-based solutions company, RES (Resource Environmental Solutions) is restoring a resilient earth for a modern world, project by project.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 430 contacts → | ||||
Indirect evidence “HydroGeoLogic, Inc.(HGL) is an employee-owned company with over 36 years of experience developing innovative, effective, and sustainable engineering and remediation solutions to…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 305 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 5 | 255 contacts → | ||||
Indirect evidence “At Forgen, we leave the planet better than we found it.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 254 contacts → | ||||
Partial evidence “Alliance is one of the most experienced and trusted environmental contractors in California.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 225 contacts → | ||||
Indirect evidence “Envirocon safely and reliably delivers projects that protect, remediate, and restore our environment for commercial and government clients nationwide.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 223 contacts → | ||||
Indirect evidence “Patriot Environmental Services, a Crystal Clean company, is a leading environmental service provider with clients throughout the Southwestern United States.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 221 contacts → | ||||
Indirect evidence “CAPE is an award-winning environmental remediation and infrastructure construction firm with a history of delivering excellence since 1985.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 176 contacts → | ||||
Partial evidence “Herrera Environmental Consultants is a leading engineering and scientific consulting firm focused on restoration, water, and sustainable development.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 175 contacts → | ||||
Partial evidence “Odin Environmental Solutions, LLC (Odin) is an award-winning contractor delivering complex environmental, geotechnical, and heavy civil infrastructure projects nationwide.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 136 contacts → | ||||
Indirect evidence “The EE & G Group dates back to 1986 and has been in business for over 33 years.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 129 contacts → | ||||
Partial evidence “Action Environmental is an Environmental and Industrial Services Contractor headquartered in Birmingham, Alabama.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 103 contacts → | ||||
Partial evidence “Innovative Construction Solutions (ICS) is a general engineering contractor with hazardous waste removal and demolition endorsements licensed in the State of California (License…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 101 contacts → | ||||
Partial evidence “Our mission is to be the keystone species in the restoration of the Chesapeake Bay.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 88 contacts → | ||||
Indirect evidence “Incorporated in 1994, Edwards-Pitman Environmental, Inc.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 88 contacts → | ||||
Indirect evidence “Stell is an Infrastructure and Environment Consulting Firm.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 84 contacts → | ||||
Partial evidence “Environmental consulting • Ecological restoration • 50+ years of service • 100% employee-owned” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 80 contacts → | ||||
Indirect evidence “Three decades of continued growth and diversification has positioned PCS, Inc.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 78 contacts → | ||||
Indirect evidence “Earth Systems delivers world-class environmental consulting and remediation services at speed.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 74 contacts → | ||||
Partial evidence “Founded in 1998, MNL is an ecological restoration company with professional services ranging from prairie and stream restoration to prescribed burning and conservation grazing.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 69 contacts → | ||||
Indirect evidence “Since 1970, the highly-trained ecologists and professionals at H.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 69 contacts → | ||||
Indirect evidence “We do environmental work.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 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 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 64 contacts → | ||||
Indirect evidence “Environmental Intelligence, LLC (EI) is a full service environmental consulting firm.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
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 restoration contractors. 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 restoration contractors.
- Partial evidence
- Its own public description names part of ecosystem restoration contractors, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name ecosystem restoration contractors. 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 824 ecosystem restoration contractors based in the United States
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Ecosystem restoration contractors based in the United States at a glance
As of Sep 16, 2026Companies by employee count
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 824 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 restoration contractors, 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 restoration contractors”. 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 restoration contractors), 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 restoration contractors, 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, 5,732 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 ecosystem restoration contractors, 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 restoration contractors are there based in the United States?
RevenueBase identified 824 ecosystem restoration contractors 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?
Environmental Science Associates, headquartered in San Francisco, tops this list with the largest team on record.
Which city has the most ecosystem restoration contractors?
Portland leads with 10 headquartered companies, followed by Oakland (9) and Seattle (9).
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 5,732 verified decision-maker contacts tracked across these 824 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.
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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.
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