Company lists · Data refreshed September 2026

Top 25 Scientific consulting firms based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 6,591 companies tracked

RevenueBase identified 6,591 company matches for scientific consulting firms associated with the United States as of September 2026 and tracks 176,446 professional contacts across them, including 85,295 with verified work emails. Houston is the largest hub.

This list covers company matches for scientific consulting firms 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 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

6,591Companies

176,446Contacts tracked

85,295Verified emails

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The 25 largest scientific consulting firms based in the United States

Ranked by team size

Top 25 of 6,591 company matches for scientific consulting firms based in the 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	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Sep 14, 2026	5,001-10,000	6,113 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
2	Power Engineers	Exact match	Hailey, ID, United StatesHQ recorded Sep 14, 2026	1,001-5,000	4,013 contacts →
	Exact match “POWER Engineers is now part of WSP.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
3	Premier Research	Exact match	Morrisville, NC, United StatesHQ recorded Sep 14, 2026	1,001-5,000	2,584 contacts →
	Exact match “Premier Research International LLC (Premier) is a global leader in clinical research and consulting services with expertise in driving an efficient and effective path to market…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
4	Geosyntec Consultants	Exact match	Boca Raton, FL, United StatesHQ recorded Sep 14, 2026	1,001-5,000	2,393 contacts →
	Exact match “Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
5	Pace Analytical Services	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 14, 2026	1,001-5,000	2,228 contacts →
	Exact match “Pace® Science and Technology Company makes the world a safer, healthier place.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
6	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	2,210 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
7	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	2,145 contacts →
	Exact match “Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
8	Hazen And Sawyer	Exact match	New York, NY, United StatesHQ recorded Sep 14, 2026	1,001-5,000	2,100 contacts →
	Exact match “As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
9	Propharma	Exact match	Raleigh, NC, United StatesHQ recorded Sep 14, 2026	1,001-5,000	2,079 contacts →
	Exact match “At ProPharma, we help pharmaceutical, biotechnology, and medical device companies bring life-changing therapies to market.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
10	LJA	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,932 contacts →
	Exact match “Employee-Owned.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
11	Analysis Group	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,781 contacts →
	Exact match “Analysis Group is one of the largest international economics consulting firms, with more than 1,500 professionals across 15 offices in North America, Europe, and Asia.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
12	Eurofins Lancaster Laboratories	Exact match	Lancaster, PA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,638 contacts →
	Exact match “Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
13	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,629 contacts →
	Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
14	GEI Consultants, INC	Exact match	Woburn, MA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,604 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
15	Alliantgroup	Exact match	Houston, TX, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,595 contacts →
	Exact match “alliant is the nation's premier consulting and management engineering firm.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
16	UES	Exact match	Orlando, FL, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,595 contacts →
	Exact match “UES provides professional engineering, environmental, testing and inspection services to clients across the United States.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
17	Trinity Life Sciences	Exact match	Waltham, MA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,566 contacts →
	Exact match “Trinity is the commercialization intelligence partner for life sciences.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
18	Exponent	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,560 contacts →
	Exact match “In an era of accelerating change, Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
19	ATLAS	Exact match	Denver, CO, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,529 contacts →
	Exact match “Atlas Technical Consultants (Atlas) provides professional testing, inspection, engineering, environmental and consulting services nationwide.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
20	Charles River Associates	Exact match	Boston, MA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,479 contacts →
	Exact match “Charles River Associates (CRA) is a global consulting firm specializing in litigation, regulatory, financial, and management consulting.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
21	Davey Resource Group, INC	Exact match	Kent, OH, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,395 contacts →
	Exact match “Davey Resource Group, Inc.(DRG) provides innovative consulting and field services that support utility infrastructure and environmental stewardship.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
22	Adec Innovations	Exact match	Irvine, CA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,304 contacts →
	Exact match “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
23	Noblis	Exact match	Reston, VA, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,261 contacts →
	Exact match “Noblis is a nonprofit science, technology, and strategy organization that brings the best of scientific thought, management, and engineering expertise in an environment of…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
24	Ardurra	Exact match	Miami, FL, United StatesHQ recorded Sep 14, 2026	1,001-5,000	1,260 contacts →
	Exact match “Expertly balancing experience and innovation to deliver unique solutions to public and private clients.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
25	Cornerstone Research	Exact match	San Francisco, CA, United StatesHQ recorded Sep 14, 2026	501-1,000	1,248 contacts →
	Exact match “At Cornerstone Research, we attribute our success to a unique combination of resources: a creative and energetic staff, cutting-edge technology and research, and our work with…” 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 6,591 scientific consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 85,295 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Scientific consulting firms based in the United States at a glance

As of Sep 14, 2026

48.3%Verified-email coverage

26.8Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · Houston

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

4,022

11-50

1,757

51-200

561

201-500

131

501-1,000

1,001-5,000

5,001-10,000

10001+

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 6,591 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 “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 85,295 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

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 the United States?

RevenueBase identified 6,591 company matches for scientific consulting firms associated with the 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?

Terracon tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most scientific consulting firms?

Houston leads with 182 company records, followed by New York (132) and San Diego (95).

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 85,295 professional contacts with verified work emails tracked across these 6,591 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.