Company lists · Data refreshed September 2026

Top 25 Geological survey services based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,816 companies tracked

RevenueBase identified 1,816 geological survey services headquartered in the United States as of September 2026 and tracks 21,998 professional contacts across them, including 9,035 with verified work emails. Houston is the largest hub.

This list covers geological survey services headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

1,816Companies

21,998Contacts tracked

9,035Verified emails

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The 25 largest geological survey services based in the United States

Ranked by team size

Top 25 of 1,816 geological survey services based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to geological survey services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Saexploration	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	521 contacts →
	Indirect evidence “SAExploration offers a full range of geophysical ground acquisition services from design, prospecting, drilling, recording and analysis of field quality, as well as mobilization…” Source: RevenueBase Database · checked Sep 19, 2026
2	Ninyo & Moore, A Socotec Company	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	501-1,000	449 contacts →
	Indirect evidence “Ninyo & Moore was acquired by SOCOTEC US.” Source: RevenueBase Database · checked Sep 19, 2026
3	Topographic, CO	Partial evidence	Benbrook, TX, United StatesHQ checked Sep 19, 2026	201-500	335 contacts →
	Partial evidence “What began as a small company in the oilfields of Southern Oklahoma, today Topographic Land Surveyors stands as the industry leader in the fields of Surveying, Mapping…” Source: RevenueBase Database · checked Sep 19, 2026
4	ENGEO	Indirect evidence	San Ramon, CA, United StatesHQ checked Sep 19, 2026	201-500	282 contacts →
	Indirect evidence “ENGEO Incorporated is an award-winning, employee-owned comprehensive provider of more than 400 geotechnical and civil engineers, geologists, GIS experts, environmental scientists…” Source: RevenueBase Database · checked Sep 19, 2026
5	Degolyer And Macnaughton	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 19, 2026	201-500	268 contacts →
	Indirect evidence “Reserves assessments and appraisals • Prospective resources assessments • Unconventional resources assessments • Contingent resources assessments • Reservoir simulation •…” Source: RevenueBase Database · checked Sep 19, 2026
6	Cascade Environmental, LLC	Indirect evidence	Bothell, WA, United StatesHQ checked Sep 19, 2026	1,001-5,000	248 contacts →
	Indirect evidence “CASCADE is the leading provider of environmental and geotechnical drilling, site investigation and environmental remediation.” Source: RevenueBase Database · checked Sep 19, 2026
7	Geotek	Indirect evidence	Las Vegas, NV, United StatesHQ checked Sep 19, 2026	201-500	215 contacts →
	Indirect evidence “Incorporated in 1997, GeoTek is a full service consulting engineering firm specializing in geotechnical engineering, construction materials testing, special inspection, and…” Source: RevenueBase Database · checked Sep 19, 2026
8	Geocon	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	201-500	197 contacts →
	Indirect evidence “Geocon is a California corporation established in 1971 as a professional engineering consulting firm providing comprehensive geotechnical engineering, geotechnical…” Source: RevenueBase Database · checked Sep 19, 2026
9	MJ	Partial evidence	Halfmoon, NY, United StatesHQ checked Sep 19, 2026	51-200	197 contacts →
	Partial evidence “MJ is a multi-disciplinary engineering and land surveying consulting firm with 44 years of comprehensive consultant design experience.” Source: RevenueBase Database · checked Sep 19, 2026
10	Blew & Associates, P.A	Indirect evidence	Fayetteville, AR, United StatesHQ checked Sep 19, 2026	201-500	189 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
11	Landpoint	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 19, 2026	201-500	185 contacts →
	Indirect evidence “Headquartered in Fort Worth, Texas, Landpoint has nine office locations and is licensed to operate in 27 states.” Source: RevenueBase Database · checked Sep 19, 2026
12	United Consulting	Indirect evidence	Norcross, GA, United StatesHQ checked Sep 19, 2026	51-200	176 contacts →
	Indirect evidence “United Consulting is a multi-disciplined engineering consulting firm located in Norcross, Georgia.” Source: RevenueBase Database · checked Sep 19, 2026
13	Transglobal Services LLC	Partial evidence	Fort Worth, TX, United StatesHQ checked Sep 19, 2026	201-500	166 contacts →
	Partial evidence “Transglobal Services, LLC (TGS) provides surveying, land services, GIS, mapping, and environmental services to the construction industry.” Source: RevenueBase Database · checked Sep 19, 2026
14	Control Point	Partial evidence	Warren, NJ, United StatesHQ checked Sep 19, 2026	201-500	151 contacts →
	Partial evidence “For over 30 years, Control Point has provided the talent needed for the jobs and projects critical to client success by delivering quality survey documents in a cost-effective and…” Source: RevenueBase Database · checked Sep 19, 2026
15	Southeastern Surveying And Mapping Corp	Partial evidence	Orlando, FL, United StatesHQ checked Sep 19, 2026	51-200	151 contacts →
	Partial evidence “Founded in Orlando in 1972, SSMC is an independent, 100% employee-owned geospatial services firm providing professional surveying and mapping, subsurface utility engineering…” Source: RevenueBase Database · checked Sep 19, 2026
16	Kumar And Associates, INC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 19, 2026	51-200	140 contacts →
	Indirect evidence “Kumar & Associates provides geotechnical engineering, engineering geology, environmental sciences, construction observation and materials testing services for projects in the…” Source: RevenueBase Database · checked Sep 19, 2026
17	CMT Technical Services	Partial evidence	West Valley City, UT, United StatesHQ checked Sep 19, 2026	201-500	138 contacts →
	Partial evidence “CMT Technical Services is a leading provider of Geotechnical Engineering, Materials Testing & Special Inspection, Surveying, and full-service Construction Management.” Source: RevenueBase Database · checked Sep 19, 2026
18	Ravi Engineering & Land Surveying, P.C	Partial evidence	Rochester, NY, United StatesHQ checked Sep 19, 2026	51-200	138 contacts →
	Partial evidence “Ravi Engineering & Land Surveying, P.C.(RE & LS) provides state-of-the-art structural, transportation, environmental and geotechnical engineering services, as well as construction…” Source: RevenueBase Database · checked Sep 19, 2026
19	Clymer Farner Barley	Indirect evidence	Middleton, FL, United StatesHQ checked Sep 19, 2026	201-500	136 contacts →
	Indirect evidence “Clymer Farner Barley, Inc.(CFB Inc) is a multi-disciplinary AEC firm providing civil engineering, environmental sciences, landscape architecture, GIS & mapping, and consulting…” Source: RevenueBase Database · checked Sep 19, 2026
20	Converse Consultants	Indirect evidence	Monrovia, CA, United StatesHQ checked Sep 19, 2026	51-200	132 contacts →
	Indirect evidence “Converse was established in 1946 by Professor Frederick J.” Source: RevenueBase Database · checked Sep 19, 2026
21	Uintah Engineering & Land Surveying Uels	Partial evidence	Vernal, UT, United StatesHQ checked Sep 19, 2026	51-200	129 contacts →
	Partial evidence “Since 1964, Uintah Engineering and Land Surveying (UELS), a CLS company, has provided a full range of civil services.” Source: RevenueBase Database · checked Sep 19, 2026
22	Triad Engineering, INC	Indirect evidence	Scott Depot, WV, United StatesHQ checked Sep 19, 2026	51-200	128 contacts →
	Indirect evidence “As a multi-disciplinary consulting firm, Triad Engineering, Inc.(Triad) provides geotechnical and civil engineering, landscape architecture, environmental services, land…” Source: RevenueBase Database · checked Sep 19, 2026
23	Geo-Hydro Engineers, INC	Indirect evidence	Kennesaw, GA, United StatesHQ checked Sep 19, 2026	51-200	122 contacts →
	Indirect evidence “Geo-Hydro provides geotechnical engineering, construction materials testing, special inspection, and environmental consulting services throughout the southeastern United States.” Source: RevenueBase Database · checked Sep 19, 2026
24	Geopoint	Partial evidence	Tampa, FL, United StatesHQ checked Sep 19, 2026	201-500	121 contacts →
	Partial evidence “One of the largest privately owned land surveying companies in Florida, GeoPoint provides standard-setting services including subsurface utility location, 811 locating…” Source: RevenueBase Database · checked Sep 19, 2026
25	Geotechnology, LLC	Indirect evidence	Saint Louis, MO, United StatesHQ checked Sep 19, 2026	201-500	117 contacts →
	Indirect evidence “Geotechnology, LLC provides geotechnical engineering, environmental sciences, geophysics, construction materials testing, non-destructive testing, water resource management and…” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: geological survey services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names geological survey services.
Partial evidence: Its own public description names part of geological survey services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geological survey services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,816 geological survey services based in the United States

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Geological survey services based in the United States at a glance

As of Sep 19, 2026

41.1%Verified-email coverage

12.1Average contacts per company

11-50Median size (employees)

4.7%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

892

11-50

696

51-200

184

201-500

501-1,000

1,001-5,000

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 1,816 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among geological survey services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “geological survey services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names geological survey services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among geological survey services, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 9,035 across the full list. 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 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Geological survey services by metro

Geological survey services in Houston85

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names geological survey services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many geological survey services are there based in the United States?

RevenueBase identified 1,816 geological survey services headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Saexploration, headquartered in Houston, tops this list with the largest team on record.

Which city has the most geological survey services?

Houston leads with 85 headquartered companies, followed by Denver (23) and Austin (19).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 9,035 verified decision-maker contacts tracked across these 1,816 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 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 Smart Search, 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.