Company lists · Data refreshed September 2026
Top 25 Environmental consulting firms based in Seattle, United States
RevenueBase identified 86 company matches for environmental consulting firms associated with Seattle, United States as of September 2026 and tracks 4,094 professional contacts across them, including 2,622 with verified work emails and 2,188 with mobile numbers. Across the United States, Houston is the largest hub for this category (133 companies); Seattle has 80.
This list covers company matches for environmental consulting firms associated with Seattle, 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 September 12, 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 consulting firms based in Seattle, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 880 contacts → | ||||
Exact match “At Parametrix, we help our clients imagine what's possible.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 2 | 859 contacts → | ||||
Exact match “The right team is more than an advantage.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 3 | 479 contacts → | ||||
Exact match “Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 4 | 184 contacts → | ||||
Exact match “Landau Associates is an employee-owned firm that provides environmental consulting and risk management for clients across many disciplines including air, noise, water, permitting…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 5 | 178 contacts → | ||||
Exact match “Harris Group is a multidiscipline engineering consulting firm with offices located throughout the United States.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 6 | 176 contacts → | ||||
Exact match “Herrera Environmental Consultants is a leading engineering and scientific consulting firm focused on restoration, water, and sustainable development.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 7 | 126 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 8 | 110 contacts → | ||||
Exact match “Cascadia Consulting Group is a majority women-owned consulting firm specializing in environmental and sustainability solutions.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 9 | 109 contacts → | ||||
Exact match “BHC Consultants, LLC (BHC) is an employee owned and managed consulting, engineering, building code and construction compliance, and planning firm with offices in Seattle and…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 10 | 51 contacts → | ||||
Exact match “Neudorfer Engineers is an integrated, multi-disciplinary firm with experts in a variety of project types.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 11 | 49 contacts → | ||||
Exact match “Hart Crowser’s engineers and scientists have the up-to-date knowledge to support practical designs and recommendations.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 12 | 48 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 · Sep 12, 2026 · View company records in RevenueBase | |||||
| 13 | 37 contacts → | ||||
Exact match “Confluence specializes in environmental science, project delivery, and regulatory strategy and compliance.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 14 | 33 contacts → | ||||
Exact match “SoundEarth is a 100% employee-owned environmental consulting firm with more than 40 dedicated and talented professionals working together to improve the environment in which we…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 15 | 31 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 16 | 22 contacts → | ||||
Exact match “At Delta E, we specialize in a diverse range of consulting services, including Sustainability, Carbon consulting, Energy services, and design expertise in Mechanical, Electrical…” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 17 | 21 contacts → | ||||
Exact match “O'Brien360 is a nationally recognized leader in the sustainable building community.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 18 | 18 contacts → | ||||
Exact match “Cascadia Law Group PLLC provides clients with the most effective environmental representation available in our region.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 19 | 16 contacts → | ||||
Exact match “At WSE, our focus is on service.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 20 | 16 contacts → | ||||
Exact match “Windward Environmental specializes in providing solutions for clients needing programmatic, technical, or logistical support for managing environmental concerns.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 21 | 15 contacts → | ||||
Exact match “We make science talk.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 22 | 14 contacts → | ||||
Exact match “Since 1980, Raedeke (RAD-ĭ-kee) Associates, Inc.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 23 | 13 contacts → | ||||
Exact match “Urban Forestry and Arboriculture Consulting Services Tree Solutions Inc.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 24 | 11 contacts → | ||||
Exact match “KE|AD (Kent Engineering | Architectural Diagnostics) has office's in both Seattle and Hawaii.” Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase | |||||
| 25 | 10 contacts → | ||||
Exact match “EHS-International, Inc.(EHSI) is a small business that specializes in providing environmental consulting and industrial hygiene services directed towards environmental assessment…” Recorded in the RevenueBase company graph · Sep 12, 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 consulting firms”. 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 86 environmental consulting firms based in Seattle, United States
See the full list, filter by size, metro and specialty, and access 2,622 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Environmental consulting firms based in Seattle, United States at a glance
As of Sep 12, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 14.0dCompany record updated
Median 72.0dHow 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 Seattle, United States whose business descriptions match “environmental consulting firms” 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 2,622 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 September 12, 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.
Environmental consulting firms by metro in the United States
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 consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many environmental consulting firms are there based in Seattle, United States?
RevenueBase identified 86 company matches for environmental consulting firms associated with Seattle, United States as of September 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?
Parametrix tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United States has the most environmental consulting firms?
Houston leads the United States with 133 company records, followed by New York (117) and Seattle (80).
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 2,622 professional contacts with verified work emails tracked across these 86 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 September 12, 2026.
Ready to reach these companies? Verified emails and direct dials for all 86 environmental consulting firms based in Seattle, United States. Start with a free account, no credit card.
Download this list →Related lists
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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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- New lists
- Environmental consulting firms based in the United States
- Environmental consulting firms based in Brazil
- Environmental consulting firms based in France
- Environmental consulting firms based in Canada
- Environmental consulting firms based in Italy
- Environmental consulting firms based in the United Kingdom
Company intelligence · public preview
Top 25 environmental consulting firms based in Seattle, 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 86 matching company records for environmental consulting firms based in Seattle, United States, with 4,094 tracked contacts and 2,622 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: September 12, 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 consulting firms based in Seattle, 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 |  Parametrixparametrix.comHQ: Seattle, WA, United StatesReported employees: 501-1,000 | Seattle, WA, United States | 501-1,000 | Exact match | 880 contacts → |
“At Parametrix, we help our clients imagine what's possible.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Coffman Engineerscoffman.comHQ: Seattle, WA, United StatesReported employees: 501-1,000 | Seattle, WA, United States | 501-1,000 | Exact match | 859 contacts → |
“The right team is more than an advantage.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Anchor QEAanchorqea.comHQ: Seattle, WA, United StatesReported employees: 501-1,000 | Seattle, WA, United States | 501-1,000 | Exact match | 479 contacts → |
“Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Landau Associateslandauinc.comHQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 184 contacts → |
“Landau Associates is an employee-owned firm that provides environmental consulting and risk management for clients across many disciplines including air, noise, water, permitting…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Harris Groupharrisgroup.comHQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 178 contacts → |
“Harris Group is a multidiscipline engineering consulting firm with offices located throughout the United States.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Herrera Environmental Consultantsherrerainc.comHQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 176 contacts → |
“Herrera Environmental Consultants is a leading engineering and scientific consulting firm focused on restoration, water, and sustainable development.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Perteet INCperteet.comHQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 126 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 8 |  Cascadia Consulting Groupcascadiaconsulting.comHQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 110 contacts → |
“Cascadia Consulting Group is a majority women-owned consulting firm specializing in environmental and sustainability solutions.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  BHC Consultantsbhcconsultants.comHQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 109 contacts → |
“BHC Consultants, LLC (BHC) is an employee owned and managed consulting, engineering, building code and construction compliance, and planning firm with offices in Seattle and…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Neudorfer Engineers, LLCneudorferengineers.comHQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 51 contacts → |
“Neudorfer Engineers is an integrated, multi-disciplinary firm with experts in a variety of project types.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Hart Crowser, A Division Of Haley & Aldrichhartcrowser.comHQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 49 contacts → |
“Hart Crowser’s engineers and scientists have the up-to-date knowledge to support practical designs and recommendations.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Floyd Sniderfloydsnider.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 48 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 · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Confluence Environmental Companyconfenv.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 37 contacts → |
“Confluence specializes in environmental science, project delivery, and regulatory strategy and compliance.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Soundearth Strategies, INCsoundearthinc.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 33 contacts → |
“SoundEarth is a 100% employee-owned environmental consulting firm with more than 40 dedicated and talented professionals working together to improve the environment in which we…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  NVL Laboratories, INCnvllabs.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 31 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 16 |  Delta E Consultingdeltaeconsulting.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 22 contacts → |
“At Delta E, we specialize in a diverse range of consulting services, including Sustainability, Carbon consulting, Energy services, and design expertise in Mechanical, Electrical…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  O'brien360obrien360.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 21 contacts → |
“O'Brien360 is a nationally recognized leader in the sustainable building community.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Cascadia LAW Group Pllccascadialaw.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 18 contacts → |
“Cascadia Law Group PLLC provides clients with the most effective environmental representation available in our region.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Watershed Science & Engineeringwatershedse.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 16 contacts → |
“At WSE, our focus is on service.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Windward Environmentalwindwardenv.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 16 contacts → |
“Windward Environmental specializes in providing solutions for clients needing programmatic, technical, or logistical support for managing environmental concerns.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Intertox, INCintertox.comHQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 15 contacts → |
“We make science talk.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Raedeke Associates, INCraedeke.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 14 contacts → |
“Since 1980, Raedeke (RAD-ĭ-kee) Associates, Inc.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Tree Solutions INCtreesolutions.netHQ: Seattle, United StatesReported employees: 11-50 | Seattle, United States | 11-50 | Exact match | 13 contacts → |
“Urban Forestry and Arboriculture Consulting Services Tree Solutions Inc.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 11 contacts → |
“KE|AD (Kent Engineering | Architectural Diagnostics) has office's in both Seattle and Hawaii.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  EHS International, Inc., Seattle, WAehsintl.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 10 contacts → |
“EHS-International, Inc.(EHSI) is a small business that specializes in providing environmental consulting and industrial hygiene services directed towards environmental assessment…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 86 company matches
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Environmental consulting firms: dataset insights
September 12, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
86 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.
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 14.0dCompany record updated
Median 72.0dHow 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.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
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: September 12, 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 ↗
Environmental consulting firms by metro in the United States
Questions about this company list
What does Exact match mean for environmental consulting firms?
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 consulting firms did RevenueBase find based in Seattle, United States?
The saved snapshot records 86 matching company records, 4,094 tracked contacts and 2,622 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: September 12, 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 consulting firms by geography
- Environmental consulting firms based in the United States
- Environmental consulting firms based in Brazil
- Environmental consulting firms based in France
- Environmental consulting firms based in Canada
- Environmental consulting firms based in Italy
- Environmental consulting firms based in the United Kingdom
- Environmental consulting firms based in Australia
- Environmental consulting firms based in Spain
- Environmental consulting firms based in Germany
- Environmental consulting firms based in Mexico
- Environmental consulting firms based in the Netherlands
- Environmental consulting firms based in Argentina
Cite this list
RevenueBase Data Team. Top 25 environmental consulting firms based in Seattle, United States. Snapshot: September 12, 2026. https://revenuebase.ai/companies/environmental-consulting-firms/united-states/seattle.
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 consulting firms based in the United States
- Environmental consulting firms based in Brazil
- Environmental consulting firms based in France
- Environmental consulting firms based in Canada
- Environmental consulting firms based in Italy
- Environmental consulting firms based in the United Kingdom
Company intelligence · public preview
Top 25 environmental consulting firms based in Seattle, United States
RevenueBase records 86 matching company records for environmental consulting firms based in Seattle, United States, with 4,094 tracked contacts and 2,622 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: September 12, 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 consulting firms based in Seattle, 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 | Parametrixparametrix.com HQ: Seattle, WA, United StatesReported employees: 501-1,000 | Seattle, WA, United States | 501-1,000 | Exact match | 880 contacts → |
“At Parametrix, we help our clients imagine what's possible.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Coffman Engineerscoffman.com HQ: Seattle, WA, United StatesReported employees: 501-1,000 | Seattle, WA, United States | 501-1,000 | Exact match | 859 contacts → |
“The right team is more than an advantage.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Anchor QEAanchorqea.com HQ: Seattle, WA, United StatesReported employees: 501-1,000 | Seattle, WA, United States | 501-1,000 | Exact match | 479 contacts → |
“Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Landau Associateslandauinc.com HQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 184 contacts → |
“Landau Associates is an employee-owned firm that provides environmental consulting and risk management for clients across many disciplines including air, noise, water, permitting…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Harris Groupharrisgroup.com HQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 178 contacts → |
“Harris Group is a multidiscipline engineering consulting firm with offices located throughout the United States.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Herrera Environmental Consultantsherrerainc.com HQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 176 contacts → |
“Herrera Environmental Consultants is a leading engineering and scientific consulting firm focused on restoration, water, and sustainable development.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Perteet INCperteet.com HQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 126 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 8 | Cascadia Consulting Groupcascadiaconsulting.com HQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 110 contacts → |
“Cascadia Consulting Group is a majority women-owned consulting firm specializing in environmental and sustainability solutions.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | BHC Consultantsbhcconsultants.com HQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 109 contacts → |
“BHC Consultants, LLC (BHC) is an employee owned and managed consulting, engineering, building code and construction compliance, and planning firm with offices in Seattle and…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Neudorfer Engineers, LLCneudorferengineers.com HQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 51 contacts → |
“Neudorfer Engineers is an integrated, multi-disciplinary firm with experts in a variety of project types.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Hart Crowser, A Division Of Haley & Aldrichhartcrowser.com HQ: Seattle, WA, United StatesReported employees: 51-200 | Seattle, WA, United States | 51-200 | Exact match | 49 contacts → |
“Hart Crowser’s engineers and scientists have the up-to-date knowledge to support practical designs and recommendations.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Floyd Sniderfloydsnider.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 48 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 · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Confluence Environmental Companyconfenv.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 37 contacts → |
“Confluence specializes in environmental science, project delivery, and regulatory strategy and compliance.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Soundearth Strategies, INCsoundearthinc.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 33 contacts → |
“SoundEarth is a 100% employee-owned environmental consulting firm with more than 40 dedicated and talented professionals working together to improve the environment in which we…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | NVL Laboratories, INCnvllabs.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 31 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 16 | Delta E Consultingdeltaeconsulting.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 22 contacts → |
“At Delta E, we specialize in a diverse range of consulting services, including Sustainability, Carbon consulting, Energy services, and design expertise in Mechanical, Electrical…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | O'brien360obrien360.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 21 contacts → |
“O'Brien360 is a nationally recognized leader in the sustainable building community.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Cascadia LAW Group Pllccascadialaw.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 18 contacts → |
“Cascadia Law Group PLLC provides clients with the most effective environmental representation available in our region.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Watershed Science & Engineeringwatershedse.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 16 contacts → |
“At WSE, our focus is on service.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Windward Environmentalwindwardenv.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 16 contacts → |
“Windward Environmental specializes in providing solutions for clients needing programmatic, technical, or logistical support for managing environmental concerns.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Intertox, INCintertox.com HQ: Seattle, WA, United StatesReported employees: 1-10 | Seattle, WA, United States | 1-10 | Exact match | 15 contacts → |
“We make science talk.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Raedeke Associates, INCraedeke.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 14 contacts → |
“Since 1980, Raedeke (RAD-ĭ-kee) Associates, Inc.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Tree Solutions INCtreesolutions.net HQ: Seattle, United StatesReported employees: 11-50 | Seattle, United States | 11-50 | Exact match | 13 contacts → |
“Urban Forestry and Arboriculture Consulting Services Tree Solutions Inc.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 11 contacts → |
“KE|AD (Kent Engineering | Architectural Diagnostics) has office's in both Seattle and Hawaii.” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | EHS International, Inc., Seattle, WAehsintl.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 10 contacts → |
“EHS-International, Inc.(EHSI) is a small business that specializes in providing environmental consulting and industrial hygiene services directed towards environmental assessment…” Recorded description excerpt · September 12, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 86 company matches
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Environmental consulting firms: dataset insights
September 12, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
86 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.
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 14.0dCompany record updated
Median 72.0dHow 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.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
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: September 12, 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 ↗
Environmental consulting firms by metro in the United States
Questions about this company list
What does Exact match mean for environmental consulting firms?
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 consulting firms did RevenueBase find based in Seattle, United States?
The saved snapshot records 86 matching company records, 4,094 tracked contacts and 2,622 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: September 12, 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.
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Cite this list
RevenueBase Data Team. Top 25 environmental consulting firms based in Seattle, United States. Snapshot: September 12, 2026. https://revenuebase.ai/companies/environmental-consulting-firms/united-states/seattle.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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