Company lists · Data refreshed November 2026

Top 25 Geothermal permitting specialists worldwide

RevenueBase identified 273 company matches for geothermal permitting specialists worldwide as of November 2026 and tracks 1,818 professional contacts across them, including 531 with verified work emails. The United States is the largest market and Ankara the largest hub.

This list covers company matches for geothermal permitting specialists worldwide, 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. Country and city lists for geothermal permitting specialists follow the table.

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 Nov 6, 2026 How this list was built
273Companies
1,818Contacts tracked
531Verified emails
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The 25 largest geothermal permitting specialists worldwide

Ranked by team size
Top 25 of 273 company matches for geothermal permitting specialists worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchIcelandHQ recorded Nov 6, 202651-200137 contacts →

Exact match

“ABOUT http://iceland-drilling.com/ Iceland Drilling Ltd is a leading high technical company in the field of high temperature geothermal drilling and has many decades of experience…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchTaupo, New ZealandHQ recorded Nov 6, 202651-20095 contacts →

Exact match

“MB Century is New Zealand's only end-to-end world-class renewable energy solutions provider specialising in Drilling, Reservoir & Wireline, Engineering Design, Precision…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchKópavogur, IcelandHQ recorded Nov 6, 202651-20066 contacts →

Exact match

“Iceland GeoSurvey, ÍSOR, is a leading provider of scientific and technical expertise to the geothermal industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchBad Wurzach, GermanyHQ recorded Nov 6, 202651-20055 contacts →

Exact match

“BauGrund Süd Gesellschaft für Geothermie mbH is an utilities company based out of MAYBACHSTRASSE 5, Bad Wurzach, Germany.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchOrleans, FranceHQ recorded Nov 6, 202611-5050 contacts →

Exact match

“CFG Services est une société de services et d’ingénierie, filiale à 100% du BRGM, spécialisée en géothermie qui dès le début des années 80 a été pionnière dans le développement…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchAscheberg, GermanyHQ recorded Nov 6, 202651-20031 contacts →

Exact match

“Die Daldrup & Söhne AG ist Spezialist für Bohrtechnik und die Erschließung geologischer Ressourcen in Deutschland mit Sitz in Ascheberg, Nordrhein-Westfalen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchS.s. Reyes, SpainHQ recorded Nov 6, 202611-5031 contacts →

Exact match

“Energía geotérmica.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchBayraklı, TürkiyeHQ recorded Nov 6, 202611-5026 contacts →

Exact match

“GMK Energy is a world leader consulting, engineering and project development company which gives engineering, project design, consultancy, owner's engineering and integrated…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchPisa, ItalyHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“Steam is an internationally-recognized advisory firm for geothermal development.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchReykjavík, IcelandHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“Reykjavík Geothermal is a global leader in geothermal energy development, specializing in delivering clean, reliable, and renewable power, heating, and cooling.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchChicago, IL, United StatesHQ recorded Nov 6, 202651-20025 contacts →

Exact match

“Who we are: High Five Solar is a one stop solution provider for solar companies and professionals throughout the US.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchOklahoma City, OK, United StatesHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“About GreenFire Energy GreenFire Energy engineers next-generation geothermal systems designed for real-world operating conditions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchMunich, GermanyHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“ERDWERK GmbH is an independent planning office offering consulting services in the fields of geothermal energy, geology, hydrogeology, energetics and drilling technology.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchParis, FranceHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“Vous souhaitez valoriser votre patrimoine immobilier, maîtriser sa consommation énergétique en lui assurant un approvisionnement local pour son confort thermique?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchNeubrandenburg, GermanyHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Geothermie Neubrandenburg GmbH (GTN) is an internationally active consultancy and planning office of engineers and geoscientsits.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchElburg, NetherlandsHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“Duratherm is een zelfstandig onderdeel van Draaijer Grondboringen Beheer BV.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchBakersfield, CA, United StatesHQ recorded Nov 6, 202611-5019 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchReno, CA, United StatesHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“Geologica excels in Geothermal Resource Consulting by providing high quality global geothermal resource exploration, development and assessment services for private and public…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchNanterre, FranceHQ recorded Nov 6, 20261-1018 contacts →

Exact match

“GEOTHER is an engineering and consulting company specializing in geothermal energy and, in a general way, in renewable energies, groundwater management and hydrogeotechnics.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“Blumen provides permitting and due diligence services for project developers, utilities, and consultants building American power, energy, and compute infrastructure.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchGermantown, United StatesHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“Dewhurst Group (DG) is an energy exploration and development company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchMaisse (91), FranceHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“Expert en forage géothermique de surface.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchMiddenmeer, NetherlandsHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“Inco-Drilling provides Directional Drilling Services focused on applying fit for purpose technology and a competent team to achieve cost effective solutions for Geothermal, Oil &…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchLawrence, United StatesHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“Geothermal and Environmental Drilling Environmental Site Assessments Phase I & II Site Remediation Services Groundwater Monitoring”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchVentura, CA, United StatesHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“Numeric Solutions LLC is a geoscience, engineering, and regulatory consulting firm founded in in Ventura, California.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 273 geothermal permitting specialists worldwide

See the full list, filter by size, metro and specialty, and access 531 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal permitting specialists worldwide at a glance

As of Nov 6, 2026
29.2%Verified-email coverage
6.7Average contacts per company
1-10Median size (employees)
2.2%Largest-city concentration · Ankara
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
154
11-50
94
51-200
15
201-500
2
501-1,000
1

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for geothermal permitting specialists are linked below.
What qualifies
Company records worldwide whose business descriptions match “geothermal permitting specialists” 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. 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 531 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.

Geothermal permitting specialists by location

1 lists · largest first

Every Geothermal permitting specialists list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 “geothermal permitting specialists”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal permitting specialists are there worldwide?

RevenueBase identified 273 company matches for geothermal permitting specialists worldwide 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?

Iceland Drilling Company LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most geothermal permitting specialists?

The United States leads with 51 companies. Every geothermal permitting specialists list by country and city is linked on this page.

Which city has the most geothermal permitting specialists?

Ankara leads with 6 company records, followed by Reykjavik (4) and Aydin (3).

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 531 professional contacts with verified work emails tracked across these 273 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.

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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.