Company lists · Data refreshed September 2026

Top 25 Geothermal energy consultants based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 573 companies tracked

RevenueBase identified 573 geothermal energy consultants headquartered in the United States as of September 2026 and tracks 7,699 professional contacts across them, including 3,435 with verified work emails. Houston is the largest hub.

This list covers geothermal energy consultants headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

573Companies

7,699Contacts tracked

3,435Verified emails

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The 25 largest geothermal energy consultants based in the United States

Ranked by team size

Top 25 of 573 geothermal energy consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal energy consultants: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Ormat Technologies, INC	Indirect evidence	Reno, NV, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,281 contacts →
	Indirect evidence “With over five decades of experience, Ormat Technologies, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
2	RRC Companies	Partial evidence	Round Rock, TX, United StatesHQ checked Sep 16, 2026	201-500	494 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
3	P2s	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 16, 2026	201-500	375 contacts →
	Indirect evidence “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Source: RevenueBase Database · checked Sep 16, 2026
4	CME Associates	Indirect evidence	Parlin, NJ, United StatesHQ checked Sep 16, 2026	201-500	336 contacts →
	Indirect evidence “CME Associates, with eight (8) office locations throughout New Jersey, provides a complete range of Environmental, Geotechnical, Engineering, Surveying and Planning services.” Source: RevenueBase Database · checked Sep 16, 2026
5	Fervo Energy	Strong evidence	Houston, CA, United StatesHQ checked Sep 16, 2026	51-200	213 contacts →
	Strong evidence “Fervo Energy provides 24/7 carbon-free energy through the development of next-generation geothermal power.” Source: RevenueBase Database · checked Sep 16, 2026
6	SCI Engineering, INC	Indirect evidence	St. Charles, MO, United StatesHQ checked Sep 16, 2026	51-200	174 contacts →
	Indirect evidence “SCI Engineering, Inc.(SCI) is a nationwide, multi-discipline professional consulting engineering firm that provides comprehensive services across all phases of project development…” Source: RevenueBase Database · checked Sep 16, 2026
7	Sain Engineering Associates INC	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 16, 2026	51-200	134 contacts →
	Indirect evidence “Sain Engineering Associates, Inc.(SEA) is a U.S.” Source: RevenueBase Database · checked Sep 16, 2026
8	Halker	Indirect evidence	Centennial, CO, United StatesHQ checked Sep 16, 2026	51-200	121 contacts →
	Indirect evidence “Halker Consulting provides custom engineered and configured services in Project Assessment and Planning, Engineering and Design, & Consulting and Implementation Guidance.” Source: RevenueBase Database · checked Sep 16, 2026
9	Dandelion Energy	Strong evidence	Mount Kisco, NY, United StatesHQ checked Sep 16, 2026	51-200	118 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
10	Brightcore Energy	Partial evidence	Armonk, NY, United StatesHQ checked Sep 16, 2026	51-200	108 contacts →
	Partial evidence “Brightcore Energy is a leading renewable energy solutions provider serving commercial, institutional, and government clients.” Source: RevenueBase Database · checked Sep 16, 2026
11	Geo-Logic Associates, INC	Indirect evidence	Ontario, CA, United StatesHQ checked Sep 16, 2026	201-500	106 contacts →
	Indirect evidence “Geo-Logic Associates, Inc.(GLA) is an employee-owned, multidisciplinary consulting firm.” Source: RevenueBase Database · checked Sep 16, 2026
12	Blade Energy Partners	Strong evidence	Frisco, TX, United StatesHQ checked Sep 16, 2026	51-200	103 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
13	ECF Engineering Consultants	Indirect evidence	West Palm Beach, FL, United StatesHQ checked Sep 16, 2026	51-200	84 contacts →
	Indirect evidence “E.” Source: RevenueBase Database · checked Sep 16, 2026
14	Quaise Energy	Partial evidence	Houston, MA, United StatesHQ checked Sep 16, 2026	51-200	62 contacts →
	Partial evidence “Quaise develops superhot geothermal power plants for a terawatt-scale world.” Source: RevenueBase Database · checked Sep 16, 2026
15	Dynamic Earth LLC	Indirect evidence	Chester, NJ, United StatesHQ checked Sep 16, 2026	51-200	60 contacts →
	Indirect evidence “Dynamic Earth, LLC provides geotechnical engineering and environmental consulting services ranging from preliminary due diligence phase studies through comprehensive site…” Source: RevenueBase Database · checked Sep 16, 2026
16	Mcphail Associates, LLC	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 16, 2026	51-200	59 contacts →
	Indirect evidence “Since 1976 McPhail Associates has been providing geotechnical engineering services to architects, owners, contractors, institutions, and developers.” Source: RevenueBase Database · checked Sep 16, 2026
17	Cornerstone Earth Group, INC	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 16, 2026	51-200	57 contacts →
	Indirect evidence “Cornerstone Earth Group integrates geotechnical engineering, environmental services, engineering geology, and construction services into a single, client-focused team to…” Source: RevenueBase Database · checked Sep 16, 2026
18	Engineering Analytics, INC	Indirect evidence	Fort Collins, CO, United StatesHQ checked Sep 16, 2026	201-500	56 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
19	Westward	Indirect evidence	Boerne, TX, United StatesHQ checked Sep 16, 2026	11-50	55 contacts →
	Indirect evidence “Westward Environmental (WESTWARD) delivers multidisciplinary consulting services in engineering, environmental sciences, geology and mining, health and safety, and natural…” Source: RevenueBase Database · checked Sep 16, 2026
20	Allied Well Drilling	Indirect evidence	Laurel, MD, United StatesHQ checked Sep 16, 2026	51-200	52 contacts →
	Indirect evidence “We at Allied Well Drilling are a full service commercial and residential gethermal heating/cooling system installer, specializing in vertically drilled closed loop systems.” Source: RevenueBase Database · checked Sep 16, 2026
21	Riner Engineering, Inc., A UES Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	51-200	47 contacts →
	Indirect evidence “Riner Engineering became part of the UES family of companies in June 2023, combining our local expertise with UES’s nationwide presence and resources.” Source: RevenueBase Database · checked Sep 16, 2026
22	IEC Corporation	Partial evidence	Sacramento, CA, United StatesHQ checked Sep 16, 2026	11-50	46 contacts →
	Partial evidence “IEC Corporation is a multi-discipline engineering, design, and consulting firm dedicated to Shaping the Future of Energy™.” Source: RevenueBase Database · checked Sep 16, 2026
23	Clear Creek Associates	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 16, 2026	11-50	42 contacts →
	Indirect evidence “Clear Creek Associates, a hydrogeological consulting company, was started in September to provide a very high level of expertise in groundwater science.” Source: RevenueBase Database · checked Sep 16, 2026
24	Darcy Solutions	Partial evidence	New Brighton, MN, United StatesHQ checked Sep 16, 2026	11-50	38 contacts →
	Partial evidence “Darcy Solutions is on a mission to put Geothermal Everywhere.” Source: RevenueBase Database · checked Sep 16, 2026
25	XGS Energy	Strong evidence	Palo Alto, CA, United StatesHQ checked Sep 16, 2026	11-50	34 contacts →
	Strong evidence “XGS Energy is a geothermal energy company founded and headquartered in Palo Alto, CA.” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: geothermal energy consultants. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names geothermal energy consultants.
Partial evidence: Its own public description names part of geothermal energy consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geothermal energy consultants. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 573 geothermal energy consultants based in the United States

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Geothermal energy consultants based in the United States at a glance

As of Sep 16, 2026

44.6%Verified-email coverage

13.4Average contacts per company

1-10Median size (employees)

6.8%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

353

11-50

172

51-200

201-500

501-1,000

1,001-5,000

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 573 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among geothermal energy consultants, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “geothermal energy consultants”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names geothermal energy consultants), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among geothermal energy consultants, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 3,435 across the full list. 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 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Geothermal energy consultants by metro

Geothermal energy consultants in Houston39

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names geothermal energy consultants, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 573 geothermal energy consultants headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Ormat Technologies, INC, headquartered in Reno, tops this list with the largest team on record.

Which city has the most geothermal energy consultants?

Houston leads with 39 headquartered companies, followed by Denver (20) and Reno (11).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,435 verified decision-maker contacts tracked across these 573 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 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 Smart Search, 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.