Company lists · Data refreshed September 2026

Top 25 Geotechnical engineering staffing companies based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 4,059 companies tracked

RevenueBase identified 4,059 company matches for geotechnical engineering staffing companies associated with the United States as of September 2026 and tracks 107,711 professional contacts across them, including 42,303 with verified work emails. Houston is the largest hub.

This list covers company matches for geotechnical engineering staffing companies 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 28, 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 28, 2026 How this list was built

4,059Companies

107,711Contacts tracked

42,303Verified emails

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The 25 largest geotechnical engineering staffing companies based in the United States

Ranked by team size

Top 25 of 4,059 company matches for geotechnical engineering staffing companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 28, 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 28, 2026 · View company records in RevenueBase
2	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
3	Bowman Consulting	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,666 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 28, 2026 · View company records in RevenueBase
4	UES	Exact match	Orlando, FL, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
5	Construction Labor Contractors	Exact match	Round Rock, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	1,234 contacts →
	Exact match “Let us make construction staffing work for you.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Contech Engineered Solutions	Exact match	West Chester, OH, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,217 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 · Sep 28, 2026 · View company records in RevenueBase
7	TRS Staffing Solutions	Exact match	Greenville, United StatesHQ recorded Sep 28, 2026	201-500	1,187 contacts →
	Exact match “TRS Staffing Solutions is a world leading engineering recruitment agency specialising in the recruitment and supply of professional, engineering, technical and field talent.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Timmons Group	Exact match	Richmond, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,066 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 28, 2026 · View company records in RevenueBase
9	GZA Geoenvironmental, INC	Exact match	Norwood, MA, United StatesHQ recorded Sep 28, 2026	501-1,000	880 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 · Sep 28, 2026 · View company records in RevenueBase
10	Mckim & Creed, INC	Exact match	Raleigh, NC, United StatesHQ recorded Sep 28, 2026	501-1,000	759 contacts →
	Exact match “What if you had the opportunity to do something you love and make a difference in peoples' lives at the same time?” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Schnabel Engineering	Exact match	Glen Allen, VA, United StatesHQ recorded Sep 28, 2026	501-1,000	707 contacts →
	Exact match “Schnabel is a trusted partner in building the foundation for project success.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Tower Engineering Professionals	Exact match	Raleigh, NC, United StatesHQ recorded Sep 28, 2026	1,001-5,000	707 contacts →
	Exact match “Tower Engineer Professionals was founded in 1997 by two tower-climbing engineers.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Overland Contracting INC	Exact match	Garner, NC, United StatesHQ recorded Sep 28, 2026	1,001-5,000	690 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 · Sep 28, 2026 · View company records in RevenueBase
14	Hirequest Direct	Exact match	Nashville, TN, United StatesHQ recorded Sep 28, 2026	n/a	618 contacts →
	Exact match “HireQuest Direct specializes in day labor, general labor, disaster recovery, skilled labor, janitorial, site clean-up, composite crew, demolition, administrative, hospitality…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Neel-Schaffer, INC	Exact match	Jackson, MS, United StatesHQ recorded Sep 28, 2026	501-1,000	591 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 · Sep 28, 2026 · View company records in RevenueBase
16	Volt Technical Resources	Exact match	Orange, CA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	584 contacts →
	Exact match “A Six Sigma Company ~61 years in the industry ~Nationwide 4 million+ candidate database ~Fortune Company ~Extensive E-Recruiting capabilities ~Reference and Employment check…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Raba Kistner, INC	Exact match	San Antonio, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	582 contacts →
	Exact match “Founded in 1968, Raba Kistner Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	DOWL	Exact match	Bellevue, WA, United StatesHQ recorded Sep 28, 2026	501-1,000	547 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 · Sep 28, 2026 · View company records in RevenueBase
19	Tech USA	Exact match	Millersville, MD, United StatesHQ recorded Sep 28, 2026	501-1,000	541 contacts →
	Exact match “A premier provider of staffing solutions, Tech USA is in the top 1% of the Recruiting Industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	EASI	Exact match	Hanover, MD, United StatesHQ recorded Sep 28, 2026	1,001-5,000	526 contacts →
	Exact match “EASi is now Actalent.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Nova Engineering And Environmental, LLC	Exact match	Kennesaw, GA, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
22	Trillium Construction Services	Exact match	Kalamazoo, MI, United StatesHQ recorded Sep 28, 2026	201-500	494 contacts →
	Exact match “Trillium Construction Services has over a quarter of a century of experience in the construction recruiting industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Tectonic Engineering Consultants, Geologists & Land Surveyors, D.P.C	Exact match	Mountainville, United StatesHQ recorded Sep 28, 2026	501-1,000	487 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Entact, LLC	Exact match	Westmont, IL, United StatesHQ recorded Sep 28, 2026	501-1,000	483 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 · Sep 28, 2026 · View company records in RevenueBase
25	Geoengineers INC	Exact match	Redmond, WA, United StatesHQ recorded Sep 28, 2026	201-500	479 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 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 engineering staffing companies”. 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 4,059 geotechnical engineering staffing companies based in the United States

See the full list, filter by size, metro and specialty, and access 42,303 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geotechnical engineering staffing companies based in the United States at a glance

As of Sep 28, 2026

39.3%Verified-email coverage

26.5Average contacts per company

11-50Median size (employees)

3.4%Largest-city concentration · Houston

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,751

11-50

1,448

51-200

642

201-500

126

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 4,059 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 engineering staffing companies” 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 42,303 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 28, 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 engineering staffing companies 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 engineering staffing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geotechnical engineering staffing companies are there based in the United States?

RevenueBase identified 4,059 company matches for geotechnical engineering staffing companies 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 engineering staffing companies?

Houston leads with 136 company records, followed by New York (60) and Austin (48).

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 42,303 professional contacts with verified work emails tracked across these 4,059 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 28, 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.