Company lists · Data refreshed October 2026

Top 25 Geothermal energy engineers based in the United States

Name: Geothermal energy engineers 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 2,102 companies tracked

RevenueBase identified 2,102 company matches for geothermal energy engineers associated with the United States as of October 2026 and tracks 20,318 professional contacts across them, including 6,687 with verified work emails. Houston is the largest hub.

This list covers company matches for geothermal energy engineers 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

2,102Companies

20,318Contacts tracked

6,687Verified emails

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The 25 largest geothermal energy engineers based in the United States

Ranked by team size

Top 25 of 2,102 company matches for geothermal energy engineers 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	John W. Danforth Company	Exact match	Tonawanda, NY, United StatesHQ recorded Oct 13, 2026	501-1,000	410 contacts →
	Exact match “We are powered by the best people in the industry.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2	United Mechanical	Exact match	San Jose, CA, United StatesHQ recorded Oct 13, 2026	201-500	349 contacts →
	Exact match “United Mechanical specializes in HVAC and Plumbing systems design, construction, retrofit, repair, and 24/7 emergency service for commercial and industrial properties throughout…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3	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
4	Holaday-Parks, INC	Exact match	Tukwila, WA, United StatesHQ recorded Oct 13, 2026	201-500	240 contacts →
	Exact match “As one of the largest full service mechanical contractors headquartered in the Pacific Northwest, Holaday Parks has grown well beyond Seattle.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
5	Airtron Heating & AIR Conditioning	Exact match	Columbus, OH, United StatesHQ recorded Oct 13, 2026	1,001-5,000	238 contacts →
	Exact match “Airtron has developed itself into one of the leading heating, ventilation, and air conditioning (HVAC) providers.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	Reliable Heating & AIR	Exact match	Kennesaw, GA, United StatesHQ recorded Oct 13, 2026	201-500	236 contacts →
	Exact match “Since 1978, Reliable Heating & Air has been serving all of Metro Atlanta's communities offering heating, cooling, plumbing and electrical services, indoor air quality, duct…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7	Tolin Mechanical Systems	Exact match	Denver, CO, United StatesHQ recorded Oct 13, 2026	201-500	228 contacts →
	Exact match “Tolin Mechanical is a Leading Energy & Commercial HVAC Services Company.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	Waterfurnace International	Exact match	Fort Wayne, IN, United StatesHQ recorded Oct 13, 2026	201-500	225 contacts →
	Exact match “WaterFurnace International, Inc.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9	Energy Air, INC	Exact match	Orlando, FL, United StatesHQ recorded Oct 13, 2026	201-500	219 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10	Haynes Mechanical Systems	Exact match	Greenwood Village, CO, United StatesHQ recorded Oct 13, 2026	201-500	203 contacts →
	Exact match “Haynes Mechanical Systems has been keeping commercial buildings running strong since 1968.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	Maxair Mechanical	Exact match	Marietta, GA, United StatesHQ recorded Oct 13, 2026	201-500	202 contacts →
	Exact match “MAXAIR Mechanical, founded in 1988, is a people first company.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12	Haller Enterprises	Exact match	Lititz, PA, United StatesHQ recorded Oct 13, 2026	201-500	197 contacts →
	Exact match “Since 1981, Haller Enterprises has proudly served central and eastern Pennsylvania as a leader in heating, cooling, plumbing, and electrical services.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	Emcor Services Aircond	Exact match	Smyrna, GA, United StatesHQ recorded Oct 13, 2026	201-500	184 contacts →
	Exact match “Backed by 80 years of experience, the more than 300 associates at EMCOR Services Aircond design and deliver comprehensive, timely, and cost effective HVAC and building system…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	Hill York	Exact match	Dania Beach, FL, United StatesHQ recorded Oct 13, 2026	201-500	168 contacts →
	Exact match “Hill York is a full service contractor that offers a full array of energy efficient air-conditioning services from concept to completion, maintenance to repair and everything in…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15	Newcomb And Company	Exact match	Raleigh, NC, United StatesHQ recorded Oct 13, 2026	201-500	163 contacts →
	Exact match “Founded in 1954, Newcomb and Company is a full-service mechanical contractor providing customers in the commercial, residential, and industrial sectors with innovative…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	GSM Services	Exact match	Gastonia, NC, United StatesHQ recorded Oct 13, 2026	201-500	163 contacts →
	Exact match “For nearly a century, GSM Services has built its reputation on reliability, honesty, expert service, and high-quality workmanship.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	Legence	Exact match	San Jose, CA, United StatesHQ recorded Oct 13, 2026	10001+	152 contacts →
	Exact match “We are a leading provider of engineering, consulting, installation and maintenance services for mission-critical systems in buildings.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	SSM Industries, INC	Exact match	Pittsburgh, PA, United StatesHQ recorded Oct 13, 2026	201-500	134 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19	HB Mcclure Company	Exact match	Harrisburg, PA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	133 contacts →
	Exact match “Since 1914, HB McClure has served homes and businesses in Central Pennsylvania by providing premier residential, commercial, and design/build mechanical services, including…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	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
21	Powers Building Hvac, Controls, And Service	Exact match	North Little Rock, AR, United StatesHQ recorded Oct 13, 2026	201-500	115 contacts →
	Exact match “Our goal at Powers is to make your buildings productive, comfortable, and efficient to operate.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	Midwest Mechanical Commercial, Industrial Hvac Mechanical Services	Exact match	Lombard, IL, United StatesHQ recorded Oct 13, 2026	51-200	114 contacts →
	Exact match “Chicago's Facilities Management Company Midwest Mechanical is a commercial HVAC services and facility management company focused on energy efficiency for building owners and…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	Lawyer Mechanical Services	Exact match	Las Vegas, NV, United StatesHQ recorded Oct 13, 2026	51-200	107 contacts →
	Exact match “Lawyer Mechanical Services (LMS) creates and maintains comfort.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24	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
25	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

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 engineers”. 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 2,102 geothermal energy engineers based in the United States

See the full list, filter by size, metro and specialty, and access 6,687 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal energy engineers based in the United States at a glance

As of Oct 13, 2026

32.9%Verified-email coverage

9.7Average contacts per company

11-50Median size (employees)

1.2%Largest-city concentration · Houston

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

941

11-50

860

51-200

237

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 2,102 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 engineers” 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 6,687 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 engineers by metro

Geothermal energy engineers in Houston25

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

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

RevenueBase identified 2,102 company matches for geothermal energy engineers 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?

John W. Danforth Company tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal energy engineers?

Houston leads with 25 company records, followed by New York (19) and Denver (14).

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 6,687 professional contacts with verified work emails tracked across these 2,102 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.