Company lists · Data refreshed November 2026
Top 23 Subsurface consultants based in the United States
RevenueBase identified 1,624 company matches for subsurface consultants associated with the United States as of November 2026 and tracks 30,374 professional contacts across them, including 11,812 with verified work emails. Houston is the largest hub.
This list covers company matches for subsurface consultants 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 November 6, 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.
The 23 largest subsurface consultants based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,363 contacts → | ||||
Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 1,610 contacts → | ||||
Exact match “Founded in 1919, Halliburton is one of the world’s largest providers of products and services to the energy industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 1,258 contacts → | ||||
Exact match “Consultants.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 508 contacts → | ||||
Exact match “GGS provides an integrated suite of Geoscience solutions to the global oil and gas industry including high-resolution RG-3D Reservoir Grade® seismic data acquisition, Multi Client…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 488 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 471 contacts → | ||||
Exact match “IFS Energy and Resources is the world’s largest independent provider of software and data solutions exclusively serving the upstream oil and gas, mining, and resource industries.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 422 contacts → | ||||
Exact match “Stratum Reservoir helps organizations make better decisions about their resources by transforming complex scientific data into actionable insights.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 397 contacts → | ||||
Exact match “Founded in 1973, JR Engineering has established itself as a premier, privately held civil engineering and surveying consulting firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 333 contacts → | ||||
Exact match “Established in 1881, Froehling & Robertson, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 320 contacts → | ||||
Exact match “Ardaman & Associates, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 315 contacts → | ||||
Exact match “Hillis-Carnes Engineering Associates, Inc.(HCEA) is a Mid-Atlantic based, multi-disciplined consulting engineering firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 294 contacts → | ||||
Exact match “ENGEO Incorporated is an award-winning, employee-owned comprehensive provider of more than 400 geotechnical and civil engineers, geologists, GIS experts, environmental scientists…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 286 contacts → | ||||
Exact match “Established in 1974, INTERA is a geosciences and engineering consulting firm focused on providing water resources and supply, environmental, mining, radioactive waste isolation…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 227 contacts → | ||||
Exact match “Incorporated in 1997, GeoTek is a full service consulting engineering firm specializing in geotechnical engineering, construction materials testing, special inspection, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 218 contacts → | ||||
Exact match “Employee-Owned.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 218 contacts → | ||||
Exact match “On October 30, 2020, LTK Engineering Services (LTK) merged with Hatch to become Hatch LTK.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 205 contacts → | ||||
Exact match “Since 1989, MC’s team of professional consultants have leveraged their extensive construction backgrounds to deliver industry-leading construction consulting and forensic…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 200 contacts → | ||||
Exact match “Since its beginning in 1995, Patriot has built its reputation on serving the needs of the growing development and redevelopment community.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 197 contacts → | ||||
Exact match “CTL|Thompson (CTL|T) has been providing innovative engineering solutions throughout Colorado since 1971.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 187 contacts → | ||||
Exact match “Small Mine Development builds and operates America’s underground mines.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 183 contacts → | ||||
Exact match “United Consulting is a multi-disciplined engineering consulting firm located in Norcross, Georgia.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 176 contacts → | ||||
Exact match “SCI Engineering, Inc.(SCI) is a nationwide, multi-discipline professional consulting engineering firm that provides comprehensive services across all phases of project development…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 170 contacts → | ||||
Exact match “Building & Earth is a professional engineering firm, specializing in geotechnical engineering, construction materials testing, special inspections per I.B.C./I.C.C.” Recorded in the RevenueBase company graph · Nov 6, 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 “subsurface consultants”. 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 23 of 1,624 subsurface consultants based in the United States
See the full list, filter by size, metro and specialty, and access 11,812 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Subsurface consultants based in the United States at a glance
As of Nov 6, 2026Companies by employee count
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 1,624 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 “subsurface consultants” 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 11,812 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 November 6, 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.
Subsurface consultants 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 “subsurface consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many subsurface consultants are there based in the United States?
RevenueBase identified 1,624 company matches for subsurface consultants associated with the United States as of November 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?
ECS Group Of Companies tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most subsurface consultants?
Houston leads with 172 company records, followed by Denver (41) and Dallas (22).
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 11,812 professional contacts with verified work emails tracked across these 1,624 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 November 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,624 subsurface consultants based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Subsurface consultants by geography
- Subsurface consultants based in Adelaide, Australia
- Subsurface consultants based in Brisbane, Australia
- Subsurface consultants based in Melbourne, Australia
- Subsurface consultants based in Perth, Australia
- Subsurface consultants based in Sydney, Australia
- Subsurface consultants based in Belo Horizonte, Brazil
- Subsurface consultants based in Rio De Janeiro, Brazil
- Subsurface consultants based in Sao Paulo, Brazil
- Subsurface consultants based in Calgary, Canada
- Subsurface consultants based in Toronto, Canada
- Subsurface consultants based in Vancouver, Canada
- Subsurface consultants based in Santiago, Chile
Browse the directory
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.
More company lists
- All company lists
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- Lists A-Z
- New lists
- Subsurface consultants based in Adelaide, Australia
- Subsurface consultants based in Brisbane, Australia
- Subsurface consultants based in Melbourne, Australia
- Subsurface consultants based in Perth, Australia
- Subsurface consultants based in Sydney, Australia
- Subsurface consultants based in Belo Horizonte, Brazil
Company intelligence · public preview
Top 23 subsurface consultants based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,624 matching company records for subsurface consultants based in the United States, with 30,374 tracked contacts and 11,812 verified work emails.
This public preview shows 23 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 23 subsurface consultants based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  ECS Group Of Companiesecslimited.comHQ: Chantilly, VA, United StatesReported employees: 1,001-5,000 | Chantilly, VA, United States | 1,001-5,000 | Exact match | 2,363 contacts → |
“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Halliburton Energy Serviceshalliburton.comHQ: Houston, TX, United StatesReported employees: 10001+ | Houston, TX, United States | 10001+ | Exact match | 1,610 contacts → |
“Founded in 1919, Halliburton is one of the world’s largest providers of products and services to the energy industry.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Rimkusrimkus.comHQ: Houston, TX, United StatesReported employees: 1,001-5,000 | Houston, TX, United States | 1,001-5,000 | Exact match | 1,258 contacts → |
“Consultants.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Global Geophysical Servicesglobalgeophysical.comHQ: Missouri City, TX, United StatesReported employees: 201-500 | Missouri City, TX, United States | 201-500 | Exact match | 508 contacts → |
“GGS provides an integrated suite of Geoscience solutions to the global oil and gas industry including high-resolution RG-3D Reservoir Grade® seismic data acquisition, Multi Client…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Geoengineers INCgeoengineers.comHQ: Redmond, WA, United StatesReported employees: 201-500 | Redmond, WA, United States | 201-500 | Exact match | 488 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 6 |  IFS Energy & Resourcesifs.comHQ: Denver, CO, United StatesReported employees: 201-500 | Denver, CO, United States | 201-500 | Exact match | 471 contacts → |
“IFS Energy and Resources is the world’s largest independent provider of software and data solutions exclusively serving the upstream oil and gas, mining, and resource industries.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Stratum Reservoirstratumreservoir.comHQ: Houston, TX, United StatesReported employees: 501-1,000 | Houston, TX, United States | 501-1,000 | Exact match | 422 contacts → |
“Stratum Reservoir helps organizations make better decisions about their resources by transforming complex scientific data into actionable insights.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  JR Engineeringjrengineering.comHQ: Centennial, CO, United StatesReported employees: 51-200 | Centennial, CO, United States | 51-200 | Exact match | 397 contacts → |
“Founded in 1973, JR Engineering has established itself as a premier, privately held civil engineering and surveying consulting firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Froehling & Robertson, INCfandr.comHQ: Richmond, VA, United StatesReported employees: 201-500 | Richmond, VA, United States | 201-500 | Exact match | 333 contacts → |
“Established in 1881, Froehling & Robertson, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Ardaman & Associatesardaman.comHQ: Orlando, FL, United StatesReported employees: 201-500 | Orlando, FL, United States | 201-500 | Exact match | 320 contacts → |
“Ardaman & Associates, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | HQ: Annapolis Junction, PA, United StatesReported employees: 201-500 | Annapolis Junction, PA, United States | 201-500 | Exact match | 315 contacts → |
“Hillis-Carnes Engineering Associates, Inc.(HCEA) is a Mid-Atlantic based, multi-disciplined consulting engineering firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  ENGEOengeo.comHQ: San Ramon, CA, United StatesReported employees: 201-500 | San Ramon, CA, United States | 201-500 | Exact match | 294 contacts → |
“ENGEO Incorporated is an award-winning, employee-owned comprehensive provider of more than 400 geotechnical and civil engineers, geologists, GIS experts, environmental scientists…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Intera Incorporatedintera.comHQ: Austin, FL, United StatesReported employees: 201-500 | Austin, FL, United States | 201-500 | Exact match | 286 contacts → |
“Established in 1974, INTERA is a geosciences and engineering consulting firm focused on providing water resources and supply, environmental, mining, radioactive waste isolation…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Geotekgeotekusa.comHQ: Las Vegas, CA, United StatesReported employees: 201-500 | Las Vegas, CA, United States | 201-500 | Exact match | 227 contacts → |
“Incorporated in 1997, GeoTek is a full service consulting engineering firm specializing in geotechnical engineering, construction materials testing, special inspection, and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  BSK Associatesbskassociates.comHQ: Fresno, CA, United StatesReported employees: 201-500 | Fresno, CA, United States | 201-500 | Exact match | 218 contacts → |
“Employee-Owned.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Hatch LTKltk.comHQ: Ambler, PA, United StatesReported employees: 201-500 | Ambler, PA, United States | 201-500 | Exact match | 218 contacts → |
“On October 30, 2020, LTK Engineering Services (LTK) merged with Hatch to become Hatch LTK.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  MC Consultantsmcconsultants.comHQ: Carlsbad, CA, United StatesReported employees: 51-200 | Carlsbad, CA, United States | 51-200 | Exact match | 205 contacts → |
“Since 1989, MC’s team of professional consultants have leveraged their extensive construction backgrounds to deliver industry-leading construction consulting and forensic…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Patriot Engineering And Environmental, INCpatrioteng.comHQ: Indianapolis, KY, United StatesReported employees: 51-200 | Indianapolis, KY, United States | 51-200 | Exact match | 200 contacts → |
“Since its beginning in 1995, Patriot has built its reputation on serving the needs of the growing development and redevelopment community.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  CTL Thompsonctlt.comHQ: Denver, CO, United StatesReported employees: 201-500 | Denver, CO, United States | 201-500 | Exact match | 197 contacts → |
“CTL|Thompson (CTL|T) has been providing innovative engineering solutions throughout Colorado since 1971.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Small Mine Development, LLCundergroundmining.comHQ: Boise, ID, United StatesReported employees: 201-500 | Boise, ID, United States | 201-500 | Exact match | 187 contacts → |
“Small Mine Development builds and operates America’s underground mines.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  United Consultingunitedconsulting.comHQ: Norcross, GA, United StatesReported employees: 51-200 | Norcross, GA, United States | 51-200 | Exact match | 183 contacts → |
“United Consulting is a multi-disciplined engineering consulting firm located in Norcross, Georgia.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  SCI Engineering, INCsciengineering.comHQ: St. Charles, CO, United StatesReported employees: 51-200 | St. Charles, CO, United States | 51-200 | Exact match | 176 contacts → |
“SCI Engineering, Inc.(SCI) is a nationwide, multi-discipline professional consulting engineering firm that provides comprehensive services across all phases of project development…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Building & Earthbuildingandearth.comHQ: Birmingham, AL, United StatesReported employees: 201-500 | Birmingham, AL, United States | 201-500 | Exact match | 170 contacts → |
“Building & Earth is a professional engineering firm, specializing in geotechnical engineering, construction materials testing, special inspections per I.B.C./I.C.C.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 23 of 1,624 company matches
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Subsurface consultants: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,622 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,624 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Subsurface consultants by metro
Questions about this company list
What does Exact match mean for subsurface consultants?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many subsurface consultants did RevenueBase find based in the United States?
The saved snapshot records 1,624 matching company records, 30,374 tracked contacts and 11,812 verified emails. The public preview displays 23 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Subsurface consultants by geography
- Subsurface consultants based in Adelaide, Australia
- Subsurface consultants based in Brisbane, Australia
- Subsurface consultants based in Melbourne, Australia
- Subsurface consultants based in Perth, Australia
- Subsurface consultants based in Sydney, Australia
- Subsurface consultants based in Belo Horizonte, Brazil
- Subsurface consultants based in Rio De Janeiro, Brazil
- Subsurface consultants based in Sao Paulo, Brazil
- Subsurface consultants based in Calgary, Canada
- Subsurface consultants based in Toronto, Canada
- Subsurface consultants based in Vancouver, Canada
- Subsurface consultants based in Santiago, Chile
Browse the directory
Cite this list
RevenueBase Data Team. Top 23 subsurface consultants based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/subsurface-consultants/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Subsurface consultants based in Adelaide, Australia
- Subsurface consultants based in Brisbane, Australia
- Subsurface consultants based in Melbourne, Australia
- Subsurface consultants based in Perth, Australia
- Subsurface consultants based in Sydney, Australia
- Subsurface consultants based in Belo Horizonte, Brazil
Company intelligence · public preview
Top 23 subsurface consultants based in the United States
RevenueBase records 1,624 matching company records for subsurface consultants based in the United States, with 30,374 tracked contacts and 11,812 verified work emails.
This public preview shows 23 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 23 subsurface consultants based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | ECS Group Of Companiesecslimited.com HQ: Chantilly, VA, United StatesReported employees: 1,001-5,000 | Chantilly, VA, United States | 1,001-5,000 | Exact match | 2,363 contacts → |
“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Halliburton Energy Serviceshalliburton.com HQ: Houston, TX, United StatesReported employees: 10001+ | Houston, TX, United States | 10001+ | Exact match | 1,610 contacts → |
“Founded in 1919, Halliburton is one of the world’s largest providers of products and services to the energy industry.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Rimkusrimkus.com HQ: Houston, TX, United StatesReported employees: 1,001-5,000 | Houston, TX, United States | 1,001-5,000 | Exact match | 1,258 contacts → |
“Consultants.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Global Geophysical Servicesglobalgeophysical.com HQ: Missouri City, TX, United StatesReported employees: 201-500 | Missouri City, TX, United States | 201-500 | Exact match | 508 contacts → |
“GGS provides an integrated suite of Geoscience solutions to the global oil and gas industry including high-resolution RG-3D Reservoir Grade® seismic data acquisition, Multi Client…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Geoengineers INCgeoengineers.com HQ: Redmond, WA, United StatesReported employees: 201-500 | Redmond, WA, United States | 201-500 | Exact match | 488 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 6 | IFS Energy & Resourcesifs.com HQ: Denver, CO, United StatesReported employees: 201-500 | Denver, CO, United States | 201-500 | Exact match | 471 contacts → |
“IFS Energy and Resources is the world’s largest independent provider of software and data solutions exclusively serving the upstream oil and gas, mining, and resource industries.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Stratum Reservoirstratumreservoir.com HQ: Houston, TX, United StatesReported employees: 501-1,000 | Houston, TX, United States | 501-1,000 | Exact match | 422 contacts → |
“Stratum Reservoir helps organizations make better decisions about their resources by transforming complex scientific data into actionable insights.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | JR Engineeringjrengineering.com HQ: Centennial, CO, United StatesReported employees: 51-200 | Centennial, CO, United States | 51-200 | Exact match | 397 contacts → |
“Founded in 1973, JR Engineering has established itself as a premier, privately held civil engineering and surveying consulting firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Froehling & Robertson, INCfandr.com HQ: Richmond, VA, United StatesReported employees: 201-500 | Richmond, VA, United States | 201-500 | Exact match | 333 contacts → |
“Established in 1881, Froehling & Robertson, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Ardaman & Associatesardaman.com HQ: Orlando, FL, United StatesReported employees: 201-500 | Orlando, FL, United States | 201-500 | Exact match | 320 contacts → |
“Ardaman & Associates, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | HQ: Annapolis Junction, PA, United StatesReported employees: 201-500 | Annapolis Junction, PA, United States | 201-500 | Exact match | 315 contacts → |
“Hillis-Carnes Engineering Associates, Inc.(HCEA) is a Mid-Atlantic based, multi-disciplined consulting engineering firm.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | ENGEOengeo.com HQ: San Ramon, CA, United StatesReported employees: 201-500 | San Ramon, CA, United States | 201-500 | Exact match | 294 contacts → |
“ENGEO Incorporated is an award-winning, employee-owned comprehensive provider of more than 400 geotechnical and civil engineers, geologists, GIS experts, environmental scientists…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Intera Incorporatedintera.com HQ: Austin, FL, United StatesReported employees: 201-500 | Austin, FL, United States | 201-500 | Exact match | 286 contacts → |
“Established in 1974, INTERA is a geosciences and engineering consulting firm focused on providing water resources and supply, environmental, mining, radioactive waste isolation…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Geotekgeotekusa.com HQ: Las Vegas, CA, United StatesReported employees: 201-500 | Las Vegas, CA, United States | 201-500 | Exact match | 227 contacts → |
“Incorporated in 1997, GeoTek is a full service consulting engineering firm specializing in geotechnical engineering, construction materials testing, special inspection, and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | BSK Associatesbskassociates.com HQ: Fresno, CA, United StatesReported employees: 201-500 | Fresno, CA, United States | 201-500 | Exact match | 218 contacts → |
“Employee-Owned.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Hatch LTKltk.com HQ: Ambler, PA, United StatesReported employees: 201-500 | Ambler, PA, United States | 201-500 | Exact match | 218 contacts → |
“On October 30, 2020, LTK Engineering Services (LTK) merged with Hatch to become Hatch LTK.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | MC Consultantsmcconsultants.com HQ: Carlsbad, CA, United StatesReported employees: 51-200 | Carlsbad, CA, United States | 51-200 | Exact match | 205 contacts → |
“Since 1989, MC’s team of professional consultants have leveraged their extensive construction backgrounds to deliver industry-leading construction consulting and forensic…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Patriot Engineering And Environmental, INCpatrioteng.com HQ: Indianapolis, KY, United StatesReported employees: 51-200 | Indianapolis, KY, United States | 51-200 | Exact match | 200 contacts → |
“Since its beginning in 1995, Patriot has built its reputation on serving the needs of the growing development and redevelopment community.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | CTL Thompsonctlt.com HQ: Denver, CO, United StatesReported employees: 201-500 | Denver, CO, United States | 201-500 | Exact match | 197 contacts → |
“CTL|Thompson (CTL|T) has been providing innovative engineering solutions throughout Colorado since 1971.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Small Mine Development, LLCundergroundmining.com HQ: Boise, ID, United StatesReported employees: 201-500 | Boise, ID, United States | 201-500 | Exact match | 187 contacts → |
“Small Mine Development builds and operates America’s underground mines.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | United Consultingunitedconsulting.com HQ: Norcross, GA, United StatesReported employees: 51-200 | Norcross, GA, United States | 51-200 | Exact match | 183 contacts → |
“United Consulting is a multi-disciplined engineering consulting firm located in Norcross, Georgia.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | SCI Engineering, INCsciengineering.com HQ: St. Charles, CO, United StatesReported employees: 51-200 | St. Charles, CO, United States | 51-200 | Exact match | 176 contacts → |
“SCI Engineering, Inc.(SCI) is a nationwide, multi-discipline professional consulting engineering firm that provides comprehensive services across all phases of project development…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Building & Earthbuildingandearth.com HQ: Birmingham, AL, United StatesReported employees: 201-500 | Birmingham, AL, United States | 201-500 | Exact match | 170 contacts → |
“Building & Earth is a professional engineering firm, specializing in geotechnical engineering, construction materials testing, special inspections per I.B.C./I.C.C.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Subsurface consultants: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,622 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,624 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Subsurface consultants by metro
Questions about this company list
What does Exact match mean for subsurface consultants?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many subsurface consultants did RevenueBase find based in the United States?
The saved snapshot records 1,624 matching company records, 30,374 tracked contacts and 11,812 verified emails. The public preview displays 23 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 23 subsurface consultants based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/subsurface-consultants/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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