Company lists · Data refreshed October 2026

Top 25 Geothermal engineering firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 10,413 companies tracked

RevenueBase identified 10,413 company matches for geothermal engineering firms worldwide as of October 2026 and tracks 180,506 professional contacts across them, including 56,419 with verified work emails. The United States is the largest market and Belo Horizonte the largest hub.

This list covers company matches for geothermal engineering firms 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 October 13, 2026. Country and city lists for geothermal engineering firms 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 Oct 13, 2026 How this list was built

10,413Companies

180,506Contacts tracked

56,419Verified emails

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The 25 largest geothermal engineering firms worldwide

Ranked by team size

Top 25 of 10,413 company matches for geothermal engineering firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 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	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Oct 13, 2026	5,001-10,000	6,380 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2	Sargent & Lundy	Exact match	Chicago, United StatesHQ recorded Oct 13, 2026	1,001-5,000	4,341 contacts →
	Exact match “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3	Golder	Exact match	Vancouver, BC, CanadaHQ recorded Oct 13, 2026	5,001-10,000	3,241 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Oct 13, 2026	1,001-5,000	2,402 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 · Oct 13, 2026 · View company records in RevenueBase
5	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	2,259 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Oct 13, 2026	1,001-5,000	2,064 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7	Enercon Services, INC	Exact match	Kennesaw, GA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,980 contacts →
	Exact match “ENERCON is a multi-discipline engineering and environmental engineering support services firm focused on delivering safe and efficient solutions for the power, data center and…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	PT Pertamina Drilling Services Indonesia	Exact match	South Jakarta, IndonesiaHQ recorded Oct 13, 2026	1,001-5,000	1,300 contacts →
	Exact match “PT Pertamina Drilling Services Indonesia (Pertamina Drilling) was established on June 13th, 2008.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9	Ormat Technologies, INC	Exact match	Reno, NV, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,298 contacts →
	Exact match “With over five decades of experience, Ormat Technologies, Inc.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10	Sepcoiii Electric Power Construction Co., LTD	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 13, 2026	10001+	1,105 contacts →
	Exact match “Electrical Power Construction Co, Ltd.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	Mapa Group	Exact match	Ankara, TürkiyeHQ recorded Oct 13, 2026	10001+	1,055 contacts →
	Exact match “Mapa Group has emerged as a global leader in the engineering and construction industry, now spanning three continents.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12	M. N. Dastur & Co. P LTD	Exact match	Kolkata, IndiaHQ recorded Oct 13, 2026	1,001-5,000	904 contacts →
	Exact match “M.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	GZA Geoenvironmental, INC	Exact match	Norwood, MA, United StatesHQ recorded Oct 13, 2026	501-1,000	903 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 · Oct 13, 2026 · View company records in RevenueBase
14	Klohn Crippen Berger	Exact match	Vancouver, BC, CanadaHQ recorded Oct 13, 2026	501-1,000	890 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 · Oct 13, 2026 · View company records in RevenueBase
15	NOVEC	Exact match	Sala El Jadida, MoroccoHQ recorded Oct 13, 2026	501-1,000	890 contacts →
	Exact match “Novec est le fruit de la fusion entre les sociétés Ingéma et Scet-Scom, dont CDG Développement est l’actionnaire de référence.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	PAE	Exact match	Portland, OR, United StatesHQ recorded Oct 13, 2026	201-500	835 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	BGC Engineering INC	Exact match	Vancouver, BC, CanadaHQ recorded Oct 13, 2026	501-1,000	813 contacts →
	Exact match “BGC Engineering is an international consulting firm that provides professional services in applied earth sciences.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	AGR	Exact match	Oslo, NorwayHQ recorded Oct 13, 2026	501-1,000	813 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 · Oct 13, 2026 · View company records in RevenueBase
19	Integral S.A. Ingenieros Consultores	Exact match	Medellín \| Bogotá \| Lima \| Miami \| Nueva Delhi, ColombiaHQ recorded Oct 13, 2026	1,001-5,000	796 contacts →
	Exact match “Over six decades offering our consultancy services locally and internationally, based on ethical principles and commitments, always through honest, socially responsible actions…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	Schnabel Engineering	Exact match	Glen Allen, VA, United StatesHQ recorded Oct 13, 2026	501-1,000	759 contacts →
	Exact match “Schnabel is a trusted partner in building the foundation for project success.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21	Shimmick Corporation	Exact match	Irvine, CA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	756 contacts →
	Exact match “At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	RWDI	Exact match	Guelph, ON, CanadaHQ recorded Oct 13, 2026	501-1,000	730 contacts →
	Exact match “We are a leading global climate and performance engineering consulting firm dedicated to creating harmony between the built and natural world.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	Sondotécnica Engenharia	Exact match	Rio De Janeiro, BrazilHQ recorded Oct 13, 2026	201-500	667 contacts →
	Exact match “Sondotécnica was founded in 1954.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24	Raba Kistner, INC	Exact match	San Antonio, TX, United StatesHQ recorded Oct 13, 2026	501-1,000	602 contacts →
	Exact match “Founded in 1968, Raba Kistner Inc.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25	JRI Ingeniería SA	Exact match	Santiago, ChileHQ recorded Oct 13, 2026	201-500	590 contacts →
	Exact match “JRI es una empresa chilena consultora de ingeniería multidisciplinaria para proyectos mineros e industriales.” Recorded in the RevenueBase company graph · Oct 13, 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 engineering firms”. 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 10,413 geothermal engineering firms worldwide

See the full list, filter by size, metro and specialty, and access 56,419 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal engineering firms worldwide at a glance

As of Oct 13, 2026

31.3%Verified-email coverage

17.3Average contacts per company

1-10Median size (employees)

0.7%Largest-city concentration · Belo Horizonte

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

5,599

11-50

3,404

51-200

1,015

201-500

203

501-1,000

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 engineering firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “geothermal engineering firms” 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 56,419 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 October 13, 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 engineering firms by location

52 lists · largest first

Every Geothermal engineering firms 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 engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal engineering firms are there worldwide?

RevenueBase identified 10,413 company matches for geothermal engineering firms worldwide as of October 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?

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

Which country has the most geothermal engineering firms?

The United States leads with 1,681 companies, followed by Italy (724) and France (667). Every geothermal engineering firms list by country and city is linked on this page.

Which city has the most geothermal engineering firms?

Belo Horizonte leads with 78 company records, followed by Calgary (73) and Ankara (67).

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 56,419 professional contacts with verified work emails tracked across these 10,413 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 October 13, 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.