Company lists · Data refreshed October 2026

Top 25 Geoscientific engineering services based in the United States

Name: Geoscientific engineering services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 26, 2026 6,847 companies tracked

RevenueBase identified 6,847 company matches for geoscientific engineering services associated with the United States as of October 2026 and tracks 236,331 professional contacts across them, including 89,206 with verified work emails. Houston is the largest hub.

This list covers company matches for geoscientific engineering services 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 26, 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 26, 2026 How this list was built

6,847Companies

236,331Contacts tracked

89,206Verified emails

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The 25 largest geoscientific engineering services based in the United States

Ranked by team size

Top 25 of 6,847 company matches for geoscientific engineering services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 26, 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	Bechtel Corporation	Exact match	Reston, VA, United StatesHQ recorded Oct 26, 2026	10001+	28,458 contacts →
	Exact match “Bechtel is a trusted engineering, construction and project management partner to industry and government.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
2	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Oct 26, 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 26, 2026 · View company records in RevenueBase
3	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Oct 26, 2026	1,001-5,000	2,402 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 · Oct 26, 2026 · View company records in RevenueBase
4	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Oct 26, 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 26, 2026 · View company records in RevenueBase
5	Providence	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 26, 2026	n/a	2,256 contacts →
	Exact match “Providence is an employee-owned engineering and environmental consulting firm.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
6	LJA	Exact match	Houston, TX, United StatesHQ recorded Oct 26, 2026	1,001-5,000	2,148 contacts →
	Exact match “Employee-Owned.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
7	Enercon Services, INC	Exact match	Kennesaw, GA, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,980 contacts →
	Exact match “ENERCON is a multi-discipline engineering and environmental engineering support services firm focused on delivering safe and efficient solutions for the power, data center and…” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
8	Bowman Consulting	Exact match	Reston, VA, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,778 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 · Oct 26, 2026 · View company records in RevenueBase
9	Woolpert	Exact match	Dayton, OH, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,676 contacts →
	Exact match “Woolpert is a global leader in architecture, engineering, and geospatial (AEG) services, with over a century of experience driving innovation and delivering impact.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
10	UES	Exact match	Orlando, FL, United StatesHQ recorded Oct 26, 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 26, 2026 · View company records in RevenueBase
11	Exponent	Exact match	Menlo Park, CA, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,628 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 · Oct 26, 2026 · View company records in RevenueBase
12	Atwell, LLC	Exact match	Southfield, MI, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,499 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 · Oct 26, 2026 · View company records in RevenueBase
13	Partner Engineering & Science, INC	Exact match	Torrance, CA, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,418 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
14	Walter P Moore	Exact match	Houston, TX, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,404 contacts →
	Exact match “Welcome to Walter P Moore!” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
15	Knight Piesold	Exact match	Denver, CO, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,326 contacts →
	Exact match “Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
16	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,266 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
17	Gulf Companies	Exact match	Houston, TX, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,171 contacts →
	Exact match “At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
18	Timmons Group	Exact match	Richmond, VA, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,122 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 · Oct 26, 2026 · View company records in RevenueBase
19	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,108 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 · Oct 26, 2026 · View company records in RevenueBase
20	S&me	Exact match	Raleigh, NC, United StatesHQ recorded Oct 26, 2026	1,001-5,000	1,084 contacts →
	Exact match “We are S & ME.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
21	GZA Geoenvironmental, INC	Exact match	Norwood, MA, United StatesHQ recorded Oct 26, 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 26, 2026 · View company records in RevenueBase
22	Coffman Engineers	Exact match	Seattle, WA, United StatesHQ recorded Oct 26, 2026	501-1,000	889 contacts →
	Exact match “The right team is more than an advantage.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
23	Mesa Associates, INC	Exact match	Madison, AL, United StatesHQ recorded Oct 26, 2026	1,001-5,000	887 contacts →
	Exact match “Mesa is a full service engineering, procurement, and construction management firm specializing in providing engineering services to electric utility, heavy industrial, and…” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
24	ATC Group Services LLC	Exact match	Lafayette, LA, United StatesHQ recorded Oct 26, 2026	1,001-5,000	872 contacts →
	Exact match “ATC Group Services LLC is now Atlas.” Recorded in the RevenueBase company graph · Oct 26, 2026 · View company records in RevenueBase
25	Mckim & Creed, INC	Exact match	Raleigh, NC, United StatesHQ recorded Oct 26, 2026	501-1,000	838 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 · Oct 26, 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 “geoscientific engineering services”. 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 6,847 geoscientific engineering services based in the United States

See the full list, filter by size, metro and specialty, and access 89,206 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geoscientific engineering services based in the United States at a glance

As of Oct 26, 2026

37.7%Verified-email coverage

34.5Average contacts per company

11-50Median size (employees)

4.5%Largest-city concentration · Houston

Oct 26, 2026Page data refreshed

Companies by employee count

1-10

3,070

11-50

2,615

51-200

889

201-500

166

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 6,847 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 “geoscientific engineering services” 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 89,206 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 26, 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.

Geoscientific engineering services 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 “geoscientific engineering services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geoscientific engineering services are there based in the United States?

RevenueBase identified 6,847 company matches for geoscientific engineering services 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?

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

Which city has the most geoscientific engineering services?

Houston leads with 309 company records, followed by New York (73) and Denver (69).

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 89,206 professional contacts with verified work emails tracked across these 6,847 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 26, 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.