Company lists · Data refreshed September 2026

Top 25 Geothermal consultants worldwide

Name: Geothermal consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 25,967 companies tracked

RevenueBase identified 25,967 company matches for geothermal consultants worldwide as of September 2026 and tracks 356,258 professional contacts across them, including 113,164 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for geothermal consultants 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 September 20, 2026. Country and city lists for geothermal consultants 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 Sep 20, 2026 How this list was built

25,967Companies

356,258Contacts tracked

113,164Verified emails

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The 25 largest geothermal consultants worldwide

Ranked by team size

Top 25 of 25,967 company matches for geothermal consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Worley	Exact match	Sydney, AustraliaHQ recorded Sep 20, 2026	10001+	34,763 contacts →
	Exact match “Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	WOOD	Exact match	Aberdeen, United KingdomHQ recorded Sep 20, 2026	10001+	26,949 contacts →
	Exact match “Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Sep 20, 2026	5,001-10,000	6,113 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4	Golder	Exact match	Vancouver, BC, CanadaHQ recorded Sep 20, 2026	5,001-10,000	3,167 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5	SRK Consulting	Exact match	Vancouver, CanadaHQ recorded Sep 20, 2026	1,001-5,000	2,259 contacts →
	Exact match “SRK Consulting is an independent, international group providing specialised consultancy services.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Sep 20, 2026	1,001-5,000	2,210 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 20, 2026	1,001-5,000	2,177 contacts →
	Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8	Energy Development Corporation	Exact match	Pasig City, PhilippinesHQ recorded Sep 20, 2026	1,001-5,000	1,719 contacts →
	Exact match “The Energy Development Corporation (EDC) is a pioneer in generating 100% clean, renewable, and reliable power as an electricity supplier in the Philippines for over 40 years.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9	Partner Engineering & Science, INC	Exact match	Torrance, CA, United StatesHQ recorded Sep 20, 2026	1,001-5,000	1,358 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10	Ormat Technologies, INC	Exact match	Reno, NV, United StatesHQ recorded Sep 20, 2026	1,001-5,000	1,281 contacts →
	Exact match “With over five decades of experience, Ormat Technologies, Inc.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11	Knight Piesold	Exact match	Denver, CO, United StatesHQ recorded Sep 20, 2026	1,001-5,000	1,231 contacts →
	Exact match “Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12	PT Pertamina Drilling Services Indonesia	Exact match	South Jakarta, IndonesiaHQ recorded Sep 20, 2026	1,001-5,000	1,200 contacts →
	Exact match “PT Pertamina Drilling Services Indonesia (Pertamina Drilling) was established on June 13th, 2008.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Sep 20, 2026	n/a	1,176 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	Hoare LEA	Exact match	London, United KingdomHQ recorded Sep 20, 2026	501-1,000	1,103 contacts →
	Exact match “We are an award-winning engineering consultancy with a creative team of engineers, designers, and technical specialists.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	HMH	Exact match	Amsterdam, United StatesHQ recorded Sep 20, 2026	1,001-5,000	1,097 contacts →
	Exact match “HMH is a premier drilling solutions provider - delivering a broad portfolio of products and services that are designed to be the safest and most efficient in the industry.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16	Sepcoiii Electric Power Construction Co., LTD	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 20, 2026	10001+	1,090 contacts →
	Exact match “Electrical Power Construction Co, Ltd.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 20, 2026	1,001-5,000	1,088 contacts →
	Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	BTP Consultants	Exact match	Montigny-le-bretonneux, FranceHQ recorded Sep 20, 2026	201-500	1,066 contacts →
	Exact match “BTP Consultants est un bureau de ̂, et présent à l'échelle nationale depuis plus de.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	M. N. Dastur & Co. P LTD	Exact match	Kolkata, IndiaHQ recorded Sep 20, 2026	1,001-5,000	894 contacts →
	Exact match “M.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20	GZA Geoenvironmental, INC	Exact match	Norwood, MA, United StatesHQ recorded Sep 20, 2026	501-1,000	880 contacts →
	Exact match “Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21	Klohn Crippen Berger	Exact match	Vancouver, BC, CanadaHQ recorded Sep 20, 2026	501-1,000	871 contacts →
	Exact match “KCB is a global engineering, geosciences, and environmental consulting firm driven by Passion, Integrity and a commitment to Excellence.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Sep 20, 2026	1,001-5,000	851 contacts →
	Exact match “Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Sep 20, 2026	501-1,000	803 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24	BGC Engineering INC	Exact match	Vancouver, BC, CanadaHQ recorded Sep 20, 2026	501-1,000	798 contacts →
	Exact match “BGC Engineering is an international consulting firm that provides professional services in applied earth sciences.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25	AGR	Exact match	Oslo, NorwayHQ recorded Sep 20, 2026	501-1,000	768 contacts →
	Exact match “AGR – an Aqualis company – is a multidisciplinary consultancy, specialising in drilling & wells, subsurface, marine and subsea solutions, resourcing, technical safety and software…” Recorded in the RevenueBase company graph · Sep 20, 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 “geothermal 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 25 of 25,967 geothermal consultants worldwide

See the full list, filter by size, metro and specialty, and access 113,164 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal consultants worldwide at a glance

As of Sep 20, 2026

31.8%Verified-email coverage

13.7Average contacts per company

1-10Median size (employees)

0.9%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

15,629

11-50

7,545

51-200

2,024

201-500

387

501-1,000

111

1,001-5,000

5,001-10,000

10001+

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 consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “geothermal 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. 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 113,164 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 September 20, 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 consultants by location

93 lists · largest first

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

Countries

Cities

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 consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal consultants are there worldwide?

RevenueBase identified 25,967 company matches for geothermal consultants worldwide as of September 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?

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

Which country has the most geothermal consultants?

The United States leads with 3,831 companies, followed by France (1,636) and Brazil (1,398). Every geothermal consultants list by country and city is linked on this page.

Which city has the most geothermal consultants?

Houston leads with 232 company records, followed by London (231) and Calgary (209).

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 113,164 professional contacts with verified work emails tracked across these 25,967 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 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 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.