Company lists · Data refreshed October 2026

Top 25 Geothermal energy engineering services based in the United States

Name: Geothermal energy engineering services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 530 companies tracked

RevenueBase identified 530 company matches for geothermal energy engineering services associated with the United States as of October 2026 and tracks 7,345 professional contacts across them, including 3,129 with verified work emails. Houston is the largest hub.

This list covers company matches for geothermal energy engineering services 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 October 13, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 13, 2026 How this list was built

530Companies

7,345Contacts tracked

3,129Verified emails

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The 25 largest geothermal energy engineering services based in the United States

Ranked by team size

Top 25 of 530 company matches for geothermal energy engineering services based in the United States, 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	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
2	RRC Companies	Exact match	Round Rock, TX, United StatesHQ recorded Oct 13, 2026	201-500	544 contacts →
	Exact match “RRC is a top-tier designer of utility-scale wind, solar, energy storage, data center, and oil & gas projects in the US and select international markets.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3	NEI Electric Power Engineering, INC	Exact match	Lakewood, CO, United StatesHQ recorded Oct 13, 2026	201-500	362 contacts →
	Exact match “NEI provides professional expertise and design engineering services for all aspects of power systems engineering.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4	Fervo Energy	Exact match	Houston, CA, United StatesHQ recorded Oct 13, 2026	51-200	270 contacts →
	Exact match “Fervo Energy provides 24/7 carbon-free energy through the development of next-generation geothermal power.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
5	Revamp Engineering, INC	Exact match	Oakland, CA, United StatesHQ recorded Oct 13, 2026	201-500	188 contacts →
	Exact match “Revamp is the premier engineering firm for large-scale renewable energy projects.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	Concord Engineering Group, INC	Exact match	Voorhees, NJ, United StatesHQ recorded Oct 13, 2026	51-200	148 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7	Sain Engineering Associates INC	Exact match	Birmingham, AL, United StatesHQ recorded Oct 13, 2026	51-200	138 contacts →
	Exact match “Sain Engineering Associates, Inc.(SEA) is a U.S.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	Dandelion Energy	Exact match	Mount Kisco, NY, United StatesHQ recorded Oct 13, 2026	51-200	130 contacts →
	Exact match “Dandelion Energy is the nation’s leading residential geothermal provider, on a mission to make the world’s most efficient heating and cooling technology accessible to everyone.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9	Blade Energy Partners	Exact match	Frisco, TX, United StatesHQ recorded Oct 13, 2026	51-200	108 contacts →
	Exact match “Founded in Blade Energy Partners is an independent consulting company known for overcoming the challenges of complex multidisciplinary projects in the oil, gas, and geothermal…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10	Zanskar	Exact match	Salt Lake City, UT, United StatesHQ recorded Oct 13, 2026	51-200	105 contacts →
	Exact match “Powering the future with the Earth’s hidden heat.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	Brightcore Energy	Exact match	Armonk, NY, United StatesHQ recorded Oct 13, 2026	51-200	103 contacts →
	Exact match “Brightcore Energy is a leading renewable energy solutions provider serving commercial, institutional, and government clients.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12	Encon Heating & A C	Exact match	Stratford, CT, United StatesHQ recorded Oct 13, 2026	201-500	99 contacts →
	Exact match “ENCON Heating & A/C provides engineering, installation, and maintenance of HVAC systems for both commercial and custom residential applications.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	Diversified Project Services International, Inc. Dpsi	Exact match	Bakersfield, CA, United StatesHQ recorded Oct 13, 2026	51-200	82 contacts →
	Exact match “Diversified Project Services International (DPSI) is a leader in engineering, land surveying, mechanical integrity, construction and safety services.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	KMB Design Group, LLC	Exact match	Wall, NJ, United StatesHQ recorded Oct 13, 2026	51-200	76 contacts →
	Exact match “KMB Design Group provides a comprehensive systematic approach to telecommunications engineering, traditional civil, mechanical, electrical, environmental, structural, solar, and…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15	JDS Consulting	Exact match	Raleigh, NC, United StatesHQ recorded Oct 13, 2026	51-200	71 contacts →
	Exact match “JDS Consulting is a multidisciplinary engineering firm headquartered in Raleigh, North Carolina.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	Quaise Energy	Exact match	Houston, MA, United StatesHQ recorded Oct 13, 2026	51-200	66 contacts →
	Exact match “Quaise develops superhot geothermal power plants for a terawatt-scale world.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	Mcphail Associates, LLC	Exact match	Burlington, MA, United StatesHQ recorded Oct 13, 2026	51-200	63 contacts →
	Exact match “Since 1976 McPhail Associates has been providing geotechnical engineering services to architects, owners, contractors, institutions, and developers.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	Axial Energy LLC	Exact match	Charlottesville, VA, United StatesHQ recorded Oct 13, 2026	51-200	58 contacts →
	Exact match “Axial Energy is an engineering and management consulting company that provides a range of services for renewable energy generation and battery storage projects.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19	Lonquist & Co., LLC	Exact match	Austin, TX, United StatesHQ recorded Oct 13, 2026	51-200	55 contacts →
	Exact match “Petroleum Engineering & Energy Advisors - With the Lonquist team, you have access to some of the most experienced and skilled professionals in the business.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	Darcy Solutions	Exact match	New Brighton, MN, United StatesHQ recorded Oct 13, 2026	11-50	52 contacts →
	Exact match “Darcy Solutions is on a mission to put Geothermal Everywhere.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21	Allied Well Drilling	Exact match	Laurel, MD, United StatesHQ recorded Oct 13, 2026	51-200	52 contacts →
	Exact match “We at Allied Well Drilling are a full service commercial and residential gethermal heating/cooling system installer, specializing in vertically drilled closed loop systems.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	JK Mechanical, INC	Exact match	Willow Street, PA, United StatesHQ recorded Oct 13, 2026	51-200	51 contacts →
	Exact match “JK Mechanical provides Smart Energy Solutions including Geothermal, Heating, Solar, Electrical, & More in Central Pennsylvania and Maryland.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	Earth Solutions Nw, LLC	Exact match	Redmond, WA, United StatesHQ recorded Oct 13, 2026	51-200	47 contacts →
	Exact match “At Earth Solutions NW, we lead geotechnical engineering initiatives on commercial and residential projects with hard-earned expertise and an unwavering commitment to client…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24	Kupper Engineering	Exact match	Willow Grove, PA, United StatesHQ recorded Oct 13, 2026	51-200	37 contacts →
	Exact match “Founded in 2004 and located in Ambler, PA, Kupper Engineering provides superior, full service professional engineering services and support, from planning and design to…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25	XGS Energy	Exact match	Palo Alto, CA, United StatesHQ recorded Oct 13, 2026	11-50	33 contacts →
	Exact match “XGS Energy is a geothermal energy company founded and headquartered in Palo Alto, CA.” 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 energy engineering services”. 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 530 geothermal energy engineering services based in the United States

See the full list, filter by size, metro and specialty, and access 3,129 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal energy engineering services based in the United States at a glance

As of Oct 13, 2026

42.6%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

4.9%Largest-city concentration · Houston

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

280

11-50

193

51-200

201-500

1,001-5,000

5,001-10,000

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 530 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 “geothermal energy engineering services” 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 3,129 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 energy engineering services by metro

Geothermal energy engineering services in Houston26

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

How many geothermal energy engineering services are there based in the United States?

RevenueBase identified 530 company matches for geothermal energy engineering services associated with the United States 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?

Ormat Technologies, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal energy engineering services?

Houston leads with 26 company records, followed by Austin (15) and Denver (9).

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 3,129 professional contacts with verified work emails tracked across these 530 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.