Company lists · Data refreshed September 2026

Top 25 Geological survey companies based in the United States

Name: Geological survey 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 20, 2026 782 companies tracked

RevenueBase identified 782 geological survey companies headquartered in the United States as of September 2026 and tracks 8,456 professional contacts across them, including 3,102 with verified work emails. Houston is the largest hub.

This list covers geological survey companies 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 20, 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 20, 2026 86% judged on-target in blind review

782Companies

8,456Contacts tracked

3,102Verified emails

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The 25 largest geological survey companies based in the United States

Ranked by team size

Top 25 of 782 geological survey companies based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to geological survey companies: 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 20, 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 20, 2026
2	Topographic, CO	Partial evidence	Benbrook, TX, United StatesHQ checked Sep 20, 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 20, 2026
3	Degolyer And Macnaughton	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 20, 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 20, 2026
4	Cascade Environmental, LLC	Indirect evidence	Bothell, WA, United StatesHQ checked Sep 20, 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 20, 2026
5	Blew & Associates, P.A	Indirect evidence	Fayetteville, AR, United StatesHQ checked Sep 20, 2026	201-500	189 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
6	Transglobal Services LLC	Partial evidence	Fort Worth, TX, United StatesHQ checked Sep 20, 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 20, 2026
7	Control Point	Partial evidence	Warren, NJ, United StatesHQ checked Sep 20, 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 20, 2026
8	Converse Consultants	Indirect evidence	Monrovia, CA, United StatesHQ checked Sep 20, 2026	51-200	132 contacts →
	Indirect evidence “Converse was established in 1946 by Professor Frederick J.” Source: RevenueBase Database · checked Sep 20, 2026
9	Geopoint	Partial evidence	Tampa, FL, United StatesHQ checked Sep 20, 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 20, 2026
10	Benthic - Utec	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	51-200	115 contacts →
	Partial evidence “Benthic is a global leader in offshore marine geotechnical investigation, survey, analysis and design.” Source: RevenueBase Database · checked Sep 20, 2026
11	Exacta Land Surveyors LLC	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 20, 2026	201-500	105 contacts →
	Partial evidence “Exacta Land Surveying provides surveying services to homeowners, homebuyers, title insurers, mortgage lenders, Realtors and other real estate professionals.” Source: RevenueBase Database · checked Sep 20, 2026
12	Feldman Geospatial	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	51-200	102 contacts →
	Partial evidence “Established in 1946, Feldman is a 100-person Geospatial firm led by 10, Registered Professional Land Surveyors and a staff solely dedicated to the practice of Land Surveying, 3D…” Source: RevenueBase Database · checked Sep 20, 2026
13	Sdii Global	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 20, 2026	51-200	88 contacts →
	Indirect evidence “Sdii Global Corporation (SDII) is an industry-leading forensic engineering and earth sciences firm, recognized by its clients as the foremost source of experts to have as their…” Source: RevenueBase Database · checked Sep 20, 2026
14	Atlas Surveying, INC	Partial evidence	Ridgeland, SC, United StatesHQ checked Sep 20, 2026	51-200	81 contacts →
	Partial evidence “Atlas Surveying is a full service land surveying company, established in 2004 by William H.” Source: RevenueBase Database · checked Sep 20, 2026
15	Microseismic, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	51-200	79 contacts →
	Indirect evidence “Specialist in Real-Time Completions Intelligence for Fracture Geometry & Efficiency \| Geohazards \| Stress Field \| CCUS \| Geothermal \| FDI \| Sinkhole Detection \| Induced Seismicity…” Source: RevenueBase Database · checked Sep 20, 2026
16	Rangefront Mining Services	Indirect evidence	Elko, NV, United StatesHQ checked Sep 20, 2026	51-200	79 contacts →
	Indirect evidence “Rangefront exists to serve your mining or exploration project in the most efficient, advanced, and forward-thinking way.” Source: RevenueBase Database · checked Sep 20, 2026
17	Collier Consulting & Collier Geophysics	Indirect evidence	Stephenville, TX, United StatesHQ checked Sep 20, 2026	51-200	71 contacts →
	Indirect evidence “Geoscience • Engineering • Geophysics Collier Consulting, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
18	NTBA	Partial evidence	Licensed In: La, ND, United StatesHQ checked Sep 20, 2026	51-200	70 contacts →
	Partial evidence “Here at NTBA, we have a three-pronged focus: engineering, surveying, and geographic information systems.” Source: RevenueBase Database · checked Sep 20, 2026
19	Zonge International	Indirect evidence	Reno, NV, United StatesHQ checked Sep 20, 2026	51-200	64 contacts →
	Indirect evidence “Minerals / Geothermal / Groundwater / Petroleum / Environmental / Infrastructure Are you concerned about ensuring every opportunity for success for your project and stakeholders?” Source: RevenueBase Database · checked Sep 20, 2026
20	Terra Guidance, LLC	Partial evidence	Englewood, CO, United StatesHQ checked Sep 20, 2026	51-200	59 contacts →
	Partial evidence “Terra Guidance provides geological analysis remotely, onsite, and in-house.” Source: RevenueBase Database · checked Sep 20, 2026
21	Paragon Geophysical Services, INC	Indirect evidence	Wichita, KS, United StatesHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “Headquartered in Wichita, Kansas, and founded in 1993, Paragon Geophysical Services, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
22	Ascent Geomatics Solutions	Partial evidence	Westminster, CO, United StatesHQ checked Sep 20, 2026	51-200	55 contacts →
	Partial evidence “Ascent Geomatics provides Land Surveying, Remote Sensing, GIS, Civil Engineering, Permitting, and Project Management services to the Energy Industry.” Source: RevenueBase Database · checked Sep 20, 2026
23	Alpine Ocean Seismic Survey, INC	Indirect evidence	Norwood, NJ, United StatesHQ checked Sep 20, 2026	51-200	55 contacts →
	Indirect evidence “Alpine are experts in acquiring, analyzing, and interpreting data from marine offshore, nearshore, and freshwater environments.” Source: RevenueBase Database · checked Sep 20, 2026
24	Geometrics INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	51-200	52 contacts →
	Indirect evidence “Empowering geoscientists everywhere to explore and quantify the world since 1969.” Source: RevenueBase Database · checked Sep 20, 2026
25	Call & Nicholas	Partial evidence	Tucson, AZ, United StatesHQ checked Sep 20, 2026	51-200	52 contacts →
	Partial evidence “CALL & NICHOLAS (CNI) is an international mining consulting firm that specializes in geological engineering, geotechnical engineering, and hydrogeology.” Source: RevenueBase Database · checked Sep 20, 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 companies. 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 companies.
Partial evidence: Its own public description names part of geological survey companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geological survey companies. 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 782 geological survey companies based in the United States

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Geological survey companies based in the United States at a glance

As of Sep 20, 2026

36.7%Verified-email coverage

10.8Average contacts per company

1-10Median size (employees)

8.2%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

416

11-50

275

51-200

201-500

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 782 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 companies, 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 companies”. 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 companies), 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 companies, 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, 3,102 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 20, 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 companies by metro

Geological survey companies in Houston64

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 companies, 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 companies are there based in the United States?

RevenueBase identified 782 geological survey companies 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 companies?

Houston leads with 64 headquartered companies, followed by Denver (11) and Midland (10).

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 3,102 verified decision-maker contacts tracked across these 782 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 20, 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.