Company lists · Data refreshed October 2026
Top 25 Environmental expert witness services based in the United States
RevenueBase identified 228 company matches for environmental expert witness services associated with the United States as of October 2026 and tracks 2,929 professional contacts across them, including 1,331 with verified work emails. Houston is the largest hub.
This list covers company matches for environmental expert witness services associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 25, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 environmental expert witness services based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 272 contacts → | ||||
Exact match “GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 2 | 189 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 3 | 186 contacts → | ||||
Exact match “Robson Forensic is a national leader in expert witness consulting, providing technical expertise across many fields within engineering, architecture, and science, as well as an…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 4 | 166 contacts → | ||||
Exact match “IEc is an environmental consulting firm with four decades of experience providing consulting services to a diverse client base.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 5 | 110 contacts → | ||||
Exact match “Hart & Hickman PC provides environmental consulting services to commercial, industrial, and governmental clients throughout the Southeast US.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 6 | 105 contacts → | ||||
Exact match “CK Associates is an environmental consulting firm that is fully owned by its employees.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 7 | 105 contacts → | ||||
Exact match “Public agencies and businesses have been relying on Chambers Group to keep them in compliance with applicable federal, state, and/or local environmental laws, regulations, and…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 8 | 95 contacts → | ||||
Exact match “Aspen Environmental Group is an expert interdisciplinary environmental impact analysis firm, specializing in the management of environmental assessment efforts under CEQA, NEPA…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 9 | 91 contacts → | ||||
Exact match “Water and Air Research, Inc.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 10 | 67 contacts → | ||||
Exact match “We are a team of consultants who specialize in natural resource and environmental assessment, planning, and permitting.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 11 | 62 contacts → | ||||
Exact match “PM Environmental is an environmental risk expert focused on business-minded solutions.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 12 | 60 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 13 | 53 contacts → | ||||
Exact match “Floyd|Snider is a multi-disciplinary environmental consulting firm providing engineering, strategic project management, and scientific expertise to achieve balanced solutions to…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 14 | 41 contacts → | ||||
Exact match “Farmer Environmental Group is a national full service environmental consulting firm providing a wide range of services to industries, municipalities, insurance, real estate…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 15 | 37 contacts → | ||||
Exact match “SoarHere.com, Soar Environmental Consulting is, above all, defined by the strength of our people and our partnerships.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 16 | 34 contacts → | ||||
Exact match “Hicks & Company Environmental/Archeological Consultants is a small, woman-owned environmental consulting firm that provides the full range of environmental management and planning…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 17 | 33 contacts → | ||||
Exact match “We’re a national full-service environmental consulting firm solving complex environmental issues.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 18 | 32 contacts → | ||||
Exact match “Advantage Environmental Consultants, LLC (AEC) is a nationwide environmental consulting firm with six regional offices located in the following areas: Metro Washington, D.C…” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 19 | 32 contacts → | ||||
Exact match “Hamer Environmental is a multi-disciplinary environmental consulting firm that turns natural resource concerns into actionable opportunities.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 20 | 25 contacts → | ||||
Exact match “We have been providing a wide range of environmental consulting services to our clients since 1975.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 21 | 25 contacts → | ||||
Exact match “DEA provides high quality professional environmental services in an efficient and cost-effective manner.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 22 | 25 contacts → | ||||
Exact match “CEM is a full-service environmental consulting firm serving commercial and governmental entities throughout the mid-Atlantic region.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 23 | 23 contacts → | ||||
Exact match “Michigan Consulting & Environmental, Inc.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 24 | 23 contacts → | ||||
Exact match “At SAGE, we believe in complete transparency.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
| 25 | 23 contacts → | ||||
Exact match “At Freestone Environmental Services, we believe in empowering our clients to create a better world.” Recorded in the RevenueBase company graph · Oct 25, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “environmental expert witness services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 228 environmental expert witness services based in the United States
See the full list, filter by size, metro and specialty, and access 1,331 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Environmental expert witness services based in the United States at a glance
As of Oct 25, 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 228 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “environmental expert witness services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 1,331 professional contacts with verified work emails across the full matched dataset. 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 October 25, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “environmental expert witness services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many environmental expert witness services are there based in the United States?
RevenueBase identified 228 company matches for environmental expert witness services associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
GSI Environmental INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most environmental expert witness services?
Houston leads with 9 company records, followed by Seattle (4) and Austin (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,331 professional contacts with verified work emails tracked across these 228 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 25, 2026.
Ready to reach these companies? Verified emails and direct dials for all 228 environmental expert witness services based in the United States. Start with a free account, no credit card.
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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 SmartSearch, 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.
More company lists
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- Lists by location
- Lists A-Z
- New lists
- Environmental expert witness services based in Brazil
- Environmental expert witness services based in Canada
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Company intelligence · public preview
Top 25 environmental expert witness services based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 228 matching company records for environmental expert witness services based in the United States, with 2,929 tracked contacts and 1,331 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 25, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 environmental expert witness services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  GSI Environmental INCgsienv.comHQ: Houston, TX, United StatesReported employees: 201-500 | Houston, TX, United States | 201-500 | Exact match | 272 contacts → |
“GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Normandeau Associates, INCnormandeau.comHQ: Bedford, NH, United StatesReported employees: 201-500 | Bedford, NH, United States | 201-500 | Exact match | 189 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 3 | Robson Forensic, INCrobsonforensic.com HQ: Lancaster, PA, United StatesReported employees: 51-200 | Lancaster, PA, United States | 51-200 | Exact match | 186 contacts → |
“Robson Forensic is a national leader in expert witness consulting, providing technical expertise across many fields within engineering, architecture, and science, as well as an…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Industrial Economics, Incorporated IECindecon.com HQ: Cambridge, MA, United StatesReported employees: 51-200 | Cambridge, MA, United States | 51-200 | Exact match | 166 contacts → |
“IEc is an environmental consulting firm with four decades of experience providing consulting services to a diverse client base.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Hart & Hickman, PCharthickman.comHQ: Charlotte, NC, United StatesReported employees: 51-200 | Charlotte, NC, United States | 51-200 | Exact match | 110 contacts → |
“Hart & Hickman PC provides environmental consulting services to commercial, industrial, and governmental clients throughout the Southeast US.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HQ: Baton Rouge, LA, United StatesReported employees: 51-200 | Baton Rouge, LA, United States | 51-200 | Exact match | 105 contacts → |
“CK Associates is an environmental consulting firm that is fully owned by its employees.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Chambers Group, INCchambersgroupinc.comHQ: Costa Mesa, CA, United StatesReported employees: 51-200 | Costa Mesa, CA, United States | 51-200 | Exact match | 105 contacts → |
“Public agencies and businesses have been relying on Chambers Group to keep them in compliance with applicable federal, state, and/or local environmental laws, regulations, and…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Aspen Environmental Groupaspeneg.com HQ: Agoura Hills, CA, United StatesReported employees: 51-200 | Agoura Hills, CA, United States | 51-200 | Exact match | 95 contacts → |
“Aspen Environmental Group is an expert interdisciplinary environmental impact analysis firm, specializing in the management of environmental assessment efforts under CEQA, NEPA…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Water & AIR Research, INCwaterandair.com HQ: Gainesville, FL, United StatesReported employees: 11-50 | Gainesville, FL, United States | 11-50 | Exact match | 91 contacts → |
“Water and Air Research, Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  ERO Resources Corporationeroresources.comHQ: Lakewood, CO, United StatesReported employees: 11-50 | Lakewood, CO, United States | 11-50 | Exact match | 67 contacts → |
“We are a team of consultants who specialize in natural resource and environmental assessment, planning, and permitting.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | PM Environmentalpmenv.com HQ: Lansing, MI, United StatesReported employees: 51-200 | Lansing, MI, United States | 51-200 | Exact match | 62 contacts → |
“PM Environmental is an environmental risk expert focused on business-minded solutions.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  LEW Environmentallewenvironmental.comHQ: Mine Hill, NJ, United StatesReported employees: 51-200 | Mine Hill, NJ, United States | 51-200 | Exact match | 60 contacts → |
“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…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Floyd Sniderfloydsnider.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 53 contacts → |
“Floyd|Snider is a multi-disciplinary environmental consulting firm providing engineering, strategic project management, and scientific expertise to achieve balanced solutions to…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Farmer Environmental Group, LLCfarmereg.comHQ: Richardson, TX, United StatesReported employees: 11-50 | Richardson, TX, United States | 11-50 | Exact match | 41 contacts → |
“Farmer Environmental Group is a national full service environmental consulting firm providing a wide range of services to industries, municipalities, insurance, real estate…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Soar Environmental Consulting, INCsoarhere.com HQ: Fresno, CA, United StatesReported employees: 51-200 | Fresno, CA, United States | 51-200 | Exact match | 37 contacts → |
“SoarHere.com, Soar Environmental Consulting is, above all, defined by the strength of our people and our partnerships.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | HQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 34 contacts → |
“Hicks & Company Environmental/Archeological Consultants is a small, woman-owned environmental consulting firm that provides the full range of environmental management and planning…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Enviroforensicsenviroforensics.comHQ: Indianapolis, IN, United StatesReported employees: 51-200 | Indianapolis, IN, United States | 51-200 | Exact match | 33 contacts → |
“We’re a national full-service environmental consulting firm solving complex environmental issues.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Advantage Environmental Consultants, LLCaec-env.comHQ: Jessup, MD, United StatesReported employees: 11-50 | Jessup, MD, United States | 11-50 | Exact match | 32 contacts → |
“Advantage Environmental Consultants, LLC (AEC) is a nationwide environmental consulting firm with six regional offices located in the following areas: Metro Washington, D.C…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Hamer Environmentalhamerenvironmental.com HQ: Mount Vernon, United StatesReported employees: 11-50 | Mount Vernon, United States | 11-50 | Exact match | 32 contacts → |
“Hamer Environmental is a multi-disciplinary environmental consulting firm that turns natural resource concerns into actionable opportunities.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Tenera Environmentaltenera.com HQ: San Luis Obispo, CA, United StatesReported employees: 11-50 | San Luis Obispo, CA, United States | 11-50 | Exact match | 25 contacts → |
“We have been providing a wide range of environmental consulting services to our clients since 1975.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Dynamic Environmental Associates, INCdynamicenvironmental.com HQ: Macon, GA, United StatesReported employees: 11-50 | Macon, GA, United States | 11-50 | Exact match | 25 contacts → |
“DEA provides high quality professional environmental services in an efficient and cost-effective manner.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Chesapeake Environmental Management, INCcemscience.com HQ: Bel Air, MD, United StatesReported employees: 51-200 | Bel Air, MD, United States | 51-200 | Exact match | 25 contacts → |
“CEM is a full-service environmental consulting firm serving commercial and governmental entities throughout the mid-Atlantic region.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Michigan Consulting & Environmentalmichenv.com HQ: Mt Pleasant, MI, United StatesReported employees: 11-50 | Mt Pleasant, MI, United States | 11-50 | Exact match | 23 contacts → |
“Michigan Consulting & Environmental, Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Sage Environmental, INCsage-enviro.comHQ: Providence, RI, United StatesReported employees: 11-50 | Providence, RI, United States | 11-50 | Exact match | 23 contacts → |
“At SAGE, we believe in complete transparency.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Freestone Environmentalgofreestone.com HQ: Richland, WA, United StatesReported employees: 11-50 | Richland, WA, United States | 11-50 | Exact match | 23 contacts → |
“At Freestone Environmental Services, we believe in empowering our clients to create a better world.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 228 company matches
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Environmental expert witness services: dataset insights
October 25, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
228 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 228 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 25, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for environmental expert witness services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many environmental expert witness services did RevenueBase find based in the United States?
The saved snapshot records 228 matching company records, 2,929 tracked contacts and 1,331 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 25, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Environmental expert witness services by geography
Cite this list
RevenueBase Data Team. Top 25 environmental expert witness services based in the United States. Snapshot: October 25, 2026. https://revenuebase.ai/companies/environmental-expert-witness-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Environmental expert witness services based in Brazil
- Environmental expert witness services based in Canada
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
Company intelligence · public preview
Top 25 environmental expert witness services based in the United States
RevenueBase records 228 matching company records for environmental expert witness services based in the United States, with 2,929 tracked contacts and 1,331 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 25, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 environmental expert witness services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | GSI Environmental INCgsienv.com HQ: Houston, TX, United StatesReported employees: 201-500 | Houston, TX, United States | 201-500 | Exact match | 272 contacts → |
“GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Normandeau Associates, INCnormandeau.com HQ: Bedford, NH, United StatesReported employees: 201-500 | Bedford, NH, United States | 201-500 | Exact match | 189 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 3 | Robson Forensic, INCrobsonforensic.com HQ: Lancaster, PA, United StatesReported employees: 51-200 | Lancaster, PA, United States | 51-200 | Exact match | 186 contacts → |
“Robson Forensic is a national leader in expert witness consulting, providing technical expertise across many fields within engineering, architecture, and science, as well as an…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Industrial Economics, Incorporated IECindecon.com HQ: Cambridge, MA, United StatesReported employees: 51-200 | Cambridge, MA, United States | 51-200 | Exact match | 166 contacts → |
“IEc is an environmental consulting firm with four decades of experience providing consulting services to a diverse client base.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Hart & Hickman, PCharthickman.com HQ: Charlotte, NC, United StatesReported employees: 51-200 | Charlotte, NC, United States | 51-200 | Exact match | 110 contacts → |
“Hart & Hickman PC provides environmental consulting services to commercial, industrial, and governmental clients throughout the Southeast US.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HQ: Baton Rouge, LA, United StatesReported employees: 51-200 | Baton Rouge, LA, United States | 51-200 | Exact match | 105 contacts → |
“CK Associates is an environmental consulting firm that is fully owned by its employees.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Chambers Group, INCchambersgroupinc.com HQ: Costa Mesa, CA, United StatesReported employees: 51-200 | Costa Mesa, CA, United States | 51-200 | Exact match | 105 contacts → |
“Public agencies and businesses have been relying on Chambers Group to keep them in compliance with applicable federal, state, and/or local environmental laws, regulations, and…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Aspen Environmental Groupaspeneg.com HQ: Agoura Hills, CA, United StatesReported employees: 51-200 | Agoura Hills, CA, United States | 51-200 | Exact match | 95 contacts → |
“Aspen Environmental Group is an expert interdisciplinary environmental impact analysis firm, specializing in the management of environmental assessment efforts under CEQA, NEPA…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Water & AIR Research, INCwaterandair.com HQ: Gainesville, FL, United StatesReported employees: 11-50 | Gainesville, FL, United States | 11-50 | Exact match | 91 contacts → |
“Water and Air Research, Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | ERO Resources Corporationeroresources.com HQ: Lakewood, CO, United StatesReported employees: 11-50 | Lakewood, CO, United States | 11-50 | Exact match | 67 contacts → |
“We are a team of consultants who specialize in natural resource and environmental assessment, planning, and permitting.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | PM Environmentalpmenv.com HQ: Lansing, MI, United StatesReported employees: 51-200 | Lansing, MI, United States | 51-200 | Exact match | 62 contacts → |
“PM Environmental is an environmental risk expert focused on business-minded solutions.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | LEW Environmentallewenvironmental.com HQ: Mine Hill, NJ, United StatesReported employees: 51-200 | Mine Hill, NJ, United States | 51-200 | Exact match | 60 contacts → |
“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…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Floyd Sniderfloydsnider.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 53 contacts → |
“Floyd|Snider is a multi-disciplinary environmental consulting firm providing engineering, strategic project management, and scientific expertise to achieve balanced solutions to…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Farmer Environmental Group, LLCfarmereg.com HQ: Richardson, TX, United StatesReported employees: 11-50 | Richardson, TX, United States | 11-50 | Exact match | 41 contacts → |
“Farmer Environmental Group is a national full service environmental consulting firm providing a wide range of services to industries, municipalities, insurance, real estate…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Soar Environmental Consulting, INCsoarhere.com HQ: Fresno, CA, United StatesReported employees: 51-200 | Fresno, CA, United States | 51-200 | Exact match | 37 contacts → |
“SoarHere.com, Soar Environmental Consulting is, above all, defined by the strength of our people and our partnerships.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | HQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 34 contacts → |
“Hicks & Company Environmental/Archeological Consultants is a small, woman-owned environmental consulting firm that provides the full range of environmental management and planning…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Enviroforensicsenviroforensics.com HQ: Indianapolis, IN, United StatesReported employees: 51-200 | Indianapolis, IN, United States | 51-200 | Exact match | 33 contacts → |
“We’re a national full-service environmental consulting firm solving complex environmental issues.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Advantage Environmental Consultants, LLCaec-env.com HQ: Jessup, MD, United StatesReported employees: 11-50 | Jessup, MD, United States | 11-50 | Exact match | 32 contacts → |
“Advantage Environmental Consultants, LLC (AEC) is a nationwide environmental consulting firm with six regional offices located in the following areas: Metro Washington, D.C…” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Hamer Environmentalhamerenvironmental.com HQ: Mount Vernon, United StatesReported employees: 11-50 | Mount Vernon, United States | 11-50 | Exact match | 32 contacts → |
“Hamer Environmental is a multi-disciplinary environmental consulting firm that turns natural resource concerns into actionable opportunities.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Tenera Environmentaltenera.com HQ: San Luis Obispo, CA, United StatesReported employees: 11-50 | San Luis Obispo, CA, United States | 11-50 | Exact match | 25 contacts → |
“We have been providing a wide range of environmental consulting services to our clients since 1975.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Dynamic Environmental Associates, INCdynamicenvironmental.com HQ: Macon, GA, United StatesReported employees: 11-50 | Macon, GA, United States | 11-50 | Exact match | 25 contacts → |
“DEA provides high quality professional environmental services in an efficient and cost-effective manner.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Chesapeake Environmental Management, INCcemscience.com HQ: Bel Air, MD, United StatesReported employees: 51-200 | Bel Air, MD, United States | 51-200 | Exact match | 25 contacts → |
“CEM is a full-service environmental consulting firm serving commercial and governmental entities throughout the mid-Atlantic region.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Michigan Consulting & Environmentalmichenv.com HQ: Mt Pleasant, MI, United StatesReported employees: 11-50 | Mt Pleasant, MI, United States | 11-50 | Exact match | 23 contacts → |
“Michigan Consulting & Environmental, Inc.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Sage Environmental, INCsage-enviro.com HQ: Providence, RI, United StatesReported employees: 11-50 | Providence, RI, United States | 11-50 | Exact match | 23 contacts → |
“At SAGE, we believe in complete transparency.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Freestone Environmentalgofreestone.com HQ: Richland, WA, United StatesReported employees: 11-50 | Richland, WA, United States | 11-50 | Exact match | 23 contacts → |
“At Freestone Environmental Services, we believe in empowering our clients to create a better world.” Recorded description excerpt · October 25, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 228 company matches
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Environmental expert witness services: dataset insights
October 25, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
228 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 228 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 25, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for environmental expert witness services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many environmental expert witness services did RevenueBase find based in the United States?
The saved snapshot records 228 matching company records, 2,929 tracked contacts and 1,331 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 25, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Environmental expert witness services by geography
Cite this list
RevenueBase Data Team. Top 25 environmental expert witness services based in the United States. Snapshot: October 25, 2026. https://revenuebase.ai/companies/environmental-expert-witness-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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