Company lists · Data refreshed September 2026

Top 25 Scientific consulting firms based in Seattle, United States

Name: Scientific consulting firms based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 77 companies tracked

RevenueBase identified 77 company matches for scientific consulting firms associated with Seattle, United States as of September 2026 and tracks 2,964 professional contacts across them, including 1,694 with verified work emails. Across the United States, Houston is the largest hub for this category (182 companies); Seattle has 77.

This list covers company matches for scientific 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 14, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 14, 2026 How this list was built

77Companies

2,964Contacts tracked

1,694Verified emails

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The 25 largest scientific consulting firms based in Seattle, United States

Ranked by team size

Top 25 of 77 company matches for scientific consulting firms based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 14, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Coffman Engineers	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	501-1,000	859 contacts →
	Exact match “The right team is more than an advantage.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
2	Anchor QEA	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	501-1,000	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 14, 2026 · View company records in RevenueBase
3	Harris Group	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	51-200	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 14, 2026 · View company records in RevenueBase
4	Herrera Environmental Consultants	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	51-200	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 14, 2026 · View company records in RevenueBase
5	Cascadia Consulting Group	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	51-200	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 14, 2026 · View company records in RevenueBase
6	BHC Consultants	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	51-200	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 14, 2026 · View company records in RevenueBase
7	YA Engineering Services	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	51-200	108 contacts →
	Exact match “YA Engineering Services is now part of YA Group.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
8	Hart Crowser, A Division Of Haley & Aldrich	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	51-200	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 14, 2026 · View company records in RevenueBase
9	Floyd Snider	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	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 14, 2026 · View company records in RevenueBase
10	Confluence Environmental Company	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	37 contacts →
	Exact match “Confluence specializes in environmental science, project delivery, and regulatory strategy and compliance.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
11	Soundearth Strategies, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	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 14, 2026 · View company records in RevenueBase
12	NVL Laboratories, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	31 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
13	Watershed Science & Engineering	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	16 contacts →
	Exact match “At WSE, our focus is on service.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
14	Nickerson And Associates LLC	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	16 contacts →
	Exact match “Nickerson and Associates LLC is a Seattle-based consulting firm specializing in applying economics, statistics, and computer-related analyses to business and public policy issues…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
15	Intertox, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	1-10	15 contacts →
	Exact match “We make science talk.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
16	Raedeke Associates, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	14 contacts →
	Exact match “Since 1980, Raedeke (RAD-ĭ-kee) Associates, Inc.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
17	Hainline	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	12 contacts →
	Exact match “HAINLINE was founded in 1981 to assist owners, architects, and contractors in the construction process.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
18	KE AD Building Consultants Kent Engineering Architectural Diagnostics	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	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 14, 2026 · View company records in RevenueBase
19	Guidance Engineering	Exact match	Seattle, United StatesHQ recorded Sep 14, 2026	1-10	10 contacts →
	Exact match “Guidance Engineering and Applied Research is an engineering and scientific consulting company that provides scientific information for clients who need answers to complex…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
20	Ridolfi INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	10 contacts →
	Exact match “Established in 1990, RIDOLFI is an award-winning, small, certified Women’s Business Enterprise (WBE) that specializes in environmental engineering and scientific consulting.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
21	Ecochem, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	1-10	10 contacts →
	Exact match “EcoChem is an environmental consulting firm that specializes in providing quality assurance oversight and management of analytical data in support of various environmental…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
22	Pacific RIM Environmental, Inc. Pacrim	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	8 contacts →
	Exact match “Pacific Rim Environmental (PacRim) is an environmental consulting firm and laboratory specializing in Regulated Materials Management, asbestos and lead-based paint surveys…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
23	Green Earth Operations, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	8 contacts →
	Exact match “Green Earth Operations is an environmental science and engineering firm providing objective analysis and environmentally responsible solutions to meet the needs of our clients.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
24	DH Environmental, INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 14, 2026	11-50	7 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
25	Stratusg Consulting	Exact match	Seattle, United StatesHQ recorded Sep 14, 2026	11-50	7 contacts →
	Exact match “StratusG Consulting is a business and technology consulting firm with over 22 years of experience working with clients in the life science industry.” Recorded in the RevenueBase company graph · Sep 14, 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 “scientific 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 77 scientific consulting firms based in Seattle, United States

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Scientific consulting firms based in Seattle, United States at a glance

As of Sep 14, 2026

57.2%Verified-email coverage

38.5Average contacts per company

1-10Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 77 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 Seattle, United States whose business descriptions match “scientific 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 1,694 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 14, 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.

Scientific 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 “scientific consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many scientific consulting firms are there based in Seattle, United States?

RevenueBase identified 77 company matches for scientific 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?

Coffman Engineers 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 scientific consulting firms?

Houston leads the United States with 182 company records, followed by New York (125) and San Diego (95). Seattle has 77.

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 1,694 professional contacts with verified work emails tracked across these 77 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 14, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase 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.