Company lists · Data refreshed September 2026

Top 25 Geotechnical consulting firms based in the United States

Name: Geotechnical 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 3, 2026 6,582 companies tracked

RevenueBase identified 6,582 company matches for geotechnical consulting firms associated with the United States as of September 2026 and tracks 178,387 professional contacts across them, including 86,643 with verified work emails and 76,373 with mobile numbers. Houston is the largest hub.

This list covers company matches for geotechnical 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 3, 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 3, 2026 How this list was built

6,582Companies

178,387Contacts tracked

86,643Verified emails

76,373Mobile numbers

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The 25 largest geotechnical consulting firms based in the United States

Ranked by team size

Top 25 of 6,582 company matches for geotechnical consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 3, 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	Tustin, CA, United States	5,001-10,000	6,024 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 3, 2026 · View company records in RevenueBase
2	Golder	Exact match	Houston, TX, United States	5,001-10,000	3,183 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
3	Geosyntec Consultants	Exact match	Boca Raton, FL, United States	1,001-5,000	2,392 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 3, 2026 · View company records in RevenueBase
4	ECS Group Of Companies	Exact match	Fredericksburg, VA, United States	1,001-5,000	2,201 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
5	Langan Engineering & Environmental Services	Exact match	El Segundo, CA, United States	1,001-5,000	2,136 contacts →
	Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
6	LJA	Exact match	Sarasota, FL, United States	1,001-5,000	2,073 contacts →
	Exact match “Employee-Owned.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
7	Bowman Consulting	Exact match	Reston, VA, United States	1,001-5,000	1,645 contacts →
	Exact match “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
8	GEI Consultants, INC	Exact match	Woburn, MA, United States	1,001-5,000	1,577 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
9	UES	Exact match	Houston, TX, United States	1,001-5,000	1,571 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 3, 2026 · View company records in RevenueBase
10	GPI Greenman-Pedersen, INC	Exact match	Maitland, FL, United States	1,001-5,000	1,357 contacts →
	Exact match “With a staff of over 1,800 professionals, Greenman-Pedersen, Inc.(GPI) is a leading engineering consulting firm that specializes in the innovative design and construction of…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
11	Partner Engineering & Science, INC	Exact match	Pasadena, CA, United States	1,001-5,000	1,348 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
12	Walter P Moore	Exact match	El Paso, TX, United States	1,001-5,000	1,293 contacts →
	Exact match “Welcome to Walter P Moore!” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
13	Atwell, LLC	Exact match	Ann Arbor, MI, United States	1,001-5,000	1,291 contacts →
	Exact match “Atwell is a full-service consulting, engineering and construction services firm that delivers a broad range of creative solutions to clients in the real estate and land…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
14	Volkert, INC	Exact match	Mobile, AL, United States	1,001-5,000	1,204 contacts →
	Exact match “Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
15	Rimkus	Exact match	Omaha, NE, United States	1,001-5,000	1,170 contacts →
	Exact match “Consultants.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
16	Bge, INC	Exact match	Vero Beach, FL, United States	1,001-5,000	1,129 contacts →
	Exact match “Ranked No.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
17	Barr Engineering CO	Exact match	Washington, United States	1,001-5,000	1,098 contacts →
	Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
18	Timmons Group	Exact match	Virginia Beach, VA, United States	1,001-5,000	1,064 contacts →
	Exact match “Timmons Group is an engineering & technology firm specializing in civil, environmental, GIS, and surveying services to clients across the US.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
19	Professional Service Industries, Inc. PSI	Exact match	Cleveland, OH, United States	1,001-5,000	780 contacts →
	Exact match “Intertek, a leading provider of quality solutions to industries around the world, has completed the acquisition of Professional Service Industries, Inc.(PSI), a leading…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
20	Hatch Mott Macdonald	Exact match	Iselin, NJ, United States	1,001-5,000	763 contacts →
	Exact match “This page is now closed.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
21	Tower Engineering Professionals	Exact match	Raleigh, NC, United States	1,001-5,000	703 contacts →
	Exact match “Tower Engineer Professionals was founded in 1997 by two tower-climbing engineers.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
22	Minova	Exact match	Grand Junction, CO, United States	1,001-5,000	444 contacts →
	Exact match “Minova is an industry leader of ground support and geotechnical solutions for mining, tunnelling and surface ground engineering projects.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
23	Cascade Environmental, LLC	Exact match	Bothell, WA, United States	1,001-5,000	250 contacts →
	Exact match “CASCADE is the leading provider of environmental and geotechnical drilling, site investigation and environmental remediation.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
24	Mclaren, A Division Of KCI	Exact match	San Luis Obispo, CA, United States	1,001-5,000	213 contacts →
	Exact match “As the Northeast Division of KCI, McLaren is a leading full-service engineering firm renowned for its trusted, high quality, and innovative approach to solving complex challenges.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
25	RBF Consulting, A Company Of Michael Baker International	Exact match	Irvine, CA, United States	1,001-5,000	177 contacts →
	Exact match “RBF Consulting, a Company of Michael Baker International, LLC, is one of the Nation's leading civil engineering, design, planning, surveying and construction management firms…” Recorded in the RevenueBase company graph · Sep 3, 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 “geotechnical 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 6,582 geotechnical consulting firms based in the United States

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Geotechnical consulting firms based in the United States at a glance

As of Sep 3, 2026

48.6%Verified-email coverage

42.8%Mobile-number coverage

27.1Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · Houston

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

3,020

11-50

2,466

51-200

840

201-500

131

501-1,000

1,001-5,000

5,001-10,000

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 “geotechnical 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 86,643 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 3, 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.

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

How many geotechnical consulting firms are there based in the United States?

RevenueBase identified 6,582 company matches for geotechnical 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 geotechnical consulting firms?

Houston leads with 183 company records, followed by New York (105) and Austin (75).

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 86,643 professional contacts with verified work emails tracked across these 6,582 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 3, 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.