Company lists · Data refreshed October 2026

Top 25 Geotechnical contractors based in the United States

Name: Geotechnical contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 9,063 companies tracked

RevenueBase identified 9,063 company matches for geotechnical contractors associated with the United States as of October 2026 and tracks 168,325 professional contacts across them, including 62,507 with verified work emails. Houston is the largest hub.

This list covers company matches for geotechnical contractors associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 13, 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 Oct 13, 2026 How this list was built

9,063Companies

168,325Contacts tracked

62,507Verified emails

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The 25 largest geotechnical contractors based in the United States

Ranked by team size

Top 25 of 9,063 company matches for geotechnical contractors based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 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 Oct 13, 2026	5,001-10,000	6,380 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	2,259 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3	Baker Construction	Exact match	Monroe, OH, United StatesHQ recorded Oct 13, 2026	10001+	2,144 contacts →
	Exact match “The nation's largest concrete contractor, Baker Construction specializes in all types of concrete construction and related solutions, including civil construction, deep…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4	UES	Exact match	Orlando, FL, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,643 contacts →
	Exact match “UES provides professional engineering, environmental, testing and inspection services to clients across the United States.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
5	Contech Engineered Solutions	Exact match	West Chester, OH, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,227 contacts →
	Exact match “Contech provides innovative, cost-effective site solutions to engineers, contractors, and developers on projects across North America.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	GZA Geoenvironmental, INC	Exact match	Norwood, MA, United StatesHQ recorded Oct 13, 2026	501-1,000	903 contacts →
	Exact match “Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7	Weeks Marine, INC	Exact match	Cranford, NJ, United StatesHQ recorded Oct 13, 2026	1,001-5,000	863 contacts →
	Exact match “Founded in 1919, Weeks Marine, Inc.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	Professional Service Industries, Inc. PSI	Exact match	Arlington Heights, IL, United StatesHQ recorded Oct 13, 2026	1,001-5,000	776 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 · Oct 13, 2026 · View company records in RevenueBase
9	Schnabel Engineering	Exact match	Glen Allen, VA, United StatesHQ recorded Oct 13, 2026	501-1,000	759 contacts →
	Exact match “Schnabel is a trusted partner in building the foundation for project success.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10	Overland Contracting INC	Exact match	Garner, NC, United StatesHQ recorded Oct 13, 2026	1,001-5,000	710 contacts →
	Exact match “Overland Contracting Inc,(OCI) is a Black & Veatch Company (BV) that provides construction services in the open/merit shop arena.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	Austin Industries	Exact match	Dallas, TX, United StatesHQ recorded Oct 13, 2026	5,001-10,000	635 contacts →
	Exact match “Austin Industries provides nearly every type of civil, commercial and industrial construction services, capitalizing on the depth of expertise in our three operating companies –…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12	Structural	Exact match	Columbia, MD, United StatesHQ recorded Oct 13, 2026	1,001-5,000	626 contacts →
	Exact match “STRUCTURAL integrates technology-driven solutions into its industry-leading specialty contracting services.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	Neel-Schaffer, INC	Exact match	Jackson, MS, United StatesHQ recorded Oct 13, 2026	501-1,000	612 contacts →
	Exact match “Neel-Schaffer is a multi-disciplined engineering, planning and construction management firm that was founded in 1983 and today is one of the largest private, employee-owned…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	Manson Construction CO	Exact match	Seattle, WA, United StatesHQ recorded Oct 13, 2026	501-1,000	611 contacts →
	Exact match “Manson is one of the nation’s leading heavy civil marine construction and dredging companies.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15	Raba Kistner, INC	Exact match	San Antonio, TX, United StatesHQ recorded Oct 13, 2026	501-1,000	602 contacts →
	Exact match “Founded in 1968, Raba Kistner Inc.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	Barnard	Exact match	Bozeman, MT, United StatesHQ recorded Oct 13, 2026	201-500	601 contacts →
	Exact match “In 1975, Tim Barnard moved to Montana with an idea that he could start his own construction company.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	DOWL	Exact match	Bellevue, WA, United StatesHQ recorded Oct 13, 2026	501-1,000	571 contacts →
	Exact match “For more than 60 years, it has been the quality of our people that defines the DOWL difference.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	Tower Engineering Professionals	Exact match	Raleigh, NC, United StatesHQ recorded Oct 13, 2026	1,001-5,000	541 contacts →
	Exact match “Tower Engineer Professionals was founded in 1997 by two tower-climbing engineers.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19	Emery Sapp & Sons, INC	Exact match	Columbia, MO, United StatesHQ recorded Oct 13, 2026	1,001-5,000	539 contacts →
	Exact match “We are proud to be one of the Midwest’s leading heavy civil infrastructure contractors.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	Largo Concrete, INC	Exact match	Tustin, CA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	530 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21	Nova Engineering And Environmental, LLC	Exact match	Kennesaw, GA, United StatesHQ recorded Oct 13, 2026	501-1,000	518 contacts →
	Exact match “Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	Tectonic Engineering Consultants, Geologists & Land Surveyors, D.P.C	Exact match	Mountainville, United StatesHQ recorded Oct 13, 2026	501-1,000	508 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	Entact, LLC	Exact match	Westmont, IL, United StatesHQ recorded Oct 13, 2026	501-1,000	491 contacts →
	Exact match “ENTACT is the partner of choice in solving our customer's most complex environmental remediation and geotechnical infrastructure challenges.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24	Kent Companies	Exact match	Grand Rapids, MI, United StatesHQ recorded Oct 13, 2026	1,001-5,000	486 contacts →
	Exact match “Kent Companies is a full-service specialty trade contractor that performs work nationwide through the support of offices in Michigan, Texas, Ohio, and the Carolinas.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25	Bauer Foundation Corp	Exact match	Odessa, FL, United StatesHQ recorded Oct 13, 2026	201-500	472 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 13, 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 contractors”. 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 9,063 geotechnical contractors based in the United States

See the full list, filter by size, metro and specialty, and access 62,507 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geotechnical contractors based in the United States at a glance

As of Oct 13, 2026

37.1%Verified-email coverage

18.6Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · Houston

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

3,293

11-50

3,496

51-200

1,730

201-500

376

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 9,063 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 “geotechnical contractors” 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 62,507 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 13, 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 contractors 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 contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geotechnical contractors are there based in the United States?

RevenueBase identified 9,063 company matches for geotechnical contractors associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

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

Which city has the most geotechnical contractors?

Houston leads with 149 company records, followed by New York (77) and Austin (64).

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 62,507 professional contacts with verified work emails tracked across these 9,063 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 13, 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.