Company lists · Data refreshed September 2026

Top 25 Energy recovery consulting firms based in the United States

RevenueBase identified 1,195 energy recovery consulting firms headquartered in the United States as of September 2026 and tracks 16,086 professional contacts across them, including 7,419 with verified work emails. Houston is the largest hub.

This list covers energy recovery consulting firms 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 28, 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 28, 2026 86% judged on-target in blind review
1,195Companies
16,086Contacts tracked
7,419Verified emails
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The 25 largest energy recovery consulting firms based in the United States

Ranked by team size
Top 25 of 1,195 energy recovery consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy recovery consulting firms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceAnaheim, CA, United StatesHQ checked Sep 28, 20261,001-5,000851 contacts →

Partial evidence

“Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.”

Source: RevenueBase Database · checked Sep 28, 2026
2Partial evidenceIrvine, CA, United StatesHQ checked Sep 28, 2026201-500383 contacts →

Partial evidence

“We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceLong Beach, CA, United StatesHQ checked Sep 28, 2026201-500375 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 28, 2026
4Indirect evidencePark Ridge, NJ, United StatesHQ checked Sep 28, 2026201-500336 contacts →

Indirect evidence

“National Utility Service, Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
5Partial evidenceJackson, MI, United StatesHQ checked Sep 28, 2026201-500305 contacts →

Partial evidence

“We provide expert engineering and consulting services that enable a more reliable and resilient power system.”

Source: RevenueBase Database · checked Sep 28, 2026
6Partial evidencePortland, OR, United StatesHQ checked Sep 28, 2026201-500288 contacts →

Partial evidence

“At Cascade Energy, we believe in better.”

Source: RevenueBase Database · checked Sep 28, 2026
7Partial evidenceDuluth, MN, United StatesHQ checked Sep 28, 2026201-500281 contacts →

Partial evidence

“We act as an extension of your team, combining deep energy expertise with seamless alignment to your processes to advance projects with confidence.”

Source: RevenueBase Database · checked Sep 28, 2026
8Strong evidenceMinneapolis, MN, United StatesHQ checked Sep 28, 2026201-500264 contacts →

Strong evidence

“Merjent is an environmental, restoration, and engineering consulting firm with a long history serving the energy industry.”

Source: RevenueBase Database · checked Sep 28, 2026
9Strong evidenceKirkland, WA, United StatesHQ checked Sep 28, 2026201-500254 contacts →

Strong evidence

“We provide global renewable energy consulting services, focused on empowering clients to navigate the complexities of the energy transition.”

Source: RevenueBase Database · checked Sep 28, 2026
10Partial evidenceMason, OH, United StatesHQ checked Sep 28, 2026201-500247 contacts →

Partial evidence

“BSI Engineering is a full-service engineering consulting firm dedicated to delivering innovative, efficient, and effective solutions across various industries.”

Source: RevenueBase Database · checked Sep 28, 2026
11Partial evidenceFairfax, VA, United StatesHQ checked Sep 28, 2026201-500214 contacts →

Partial evidence

“PEG presents a comprehensive capacity for the evaluation and understanding of a broad base of energy and environmental sustainability related programs, policies and initiatives.”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceBeverly, MA, United StatesHQ checked Sep 28, 2026201-500210 contacts →

Partial evidence

“Dalkia Energy Solutions, a subsidiary of the EDF (Électricité de France) Group, is a national leader in energy efficiency and sustainability for commercial, industrial, and…”

Source: RevenueBase Database · checked Sep 28, 2026
13Strong evidenceHalf Moon Bay, CA, United StatesHQ checked Sep 28, 2026201-500183 contacts →

Strong evidence

“Resource Innovations now combined with Nexant is a substantially woman-owned, woman-led energy consulting firm dedicated to creating equal access to clean resources through…”

Source: RevenueBase Database · checked Sep 28, 2026
14Partial evidenceSeattle, WA, United StatesHQ checked Sep 28, 2026201-500181 contacts →

Partial evidence

“Utilicast is more than just a consulting company.”

Source: RevenueBase Database · checked Sep 28, 2026
15Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 28, 202651-200156 contacts →

Partial evidence

“Energy.”

Source: RevenueBase Database · checked Sep 28, 2026
16Strong evidenceEvanston, IL, United StatesHQ checked Sep 28, 202651-200153 contacts →

Strong evidence

“Grumman|Butkus Associates (GBA) is a nationally recognized consulting engineering firm that specializes in mechanical, electrical and plumbing design services and energy and…”

Source: RevenueBase Database · checked Sep 28, 2026
17Partial evidenceMinneapolis, MN, United StatesHQ checked Sep 28, 202651-200149 contacts →

Partial evidence

“Dunham is a full service mechanical and electrical consulting firm.”

Source: RevenueBase Database · checked Sep 28, 2026
18Indirect evidenceVoorhees, NJ, United StatesHQ checked Sep 28, 202651-200135 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceMonroe, OH, United StatesHQ checked Sep 28, 2026201-500134 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceBirmingham, AL, United StatesHQ checked Sep 28, 202651-200134 contacts →

Indirect evidence

“Sain Engineering Associates, Inc.(SEA) is a U.S.”

Source: RevenueBase Database · checked Sep 28, 2026
21Partial evidenceSt. Louis, MO, United StatesHQ checked Sep 28, 202651-200129 contacts →

Partial evidence

“McClure Engineering is a Mechanical and Electrical Consulting Engineering firm dedicated to the development of innovative solutions for the unique engineering needs of our clients.”

Source: RevenueBase Database · checked Sep 28, 2026
22Partial evidenceDallas, TX, United StatesHQ checked Sep 28, 202651-200128 contacts →

Partial evidence

“Merit Advisors provides our partners in the energy industry with the best financial solutions and vision to uncover overlooked savings.”

Source: RevenueBase Database · checked Sep 28, 2026
23Partial evidenceFresno, CA, United StatesHQ checked Sep 28, 2026501-1,000124 contacts →

Partial evidence

“Synergy Companies is the largest energy services companies in California and provides a comprehensive approach to energy efficiency and environmental solutions in both the…”

Source: RevenueBase Database · checked Sep 28, 2026
24Partial evidenceCentennial, CO, United StatesHQ checked Sep 28, 202651-200121 contacts →

Partial 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 28, 2026
25Strong evidenceLa Crosse, WI, United StatesHQ checked Sep 28, 202651-200121 contacts →

Strong evidence

“Michaels Energy is a veteran-owned energy consulting firm that exists to help businesses minimize waste and maximize value.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 1,195 energy recovery consulting firms based in the United States

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Energy recovery consulting firms based in the United States at a glance

As of Sep 28, 2026
46.1%Verified-email coverage
13.5Average contacts per company
1-10Median size (employees)
4.8%Largest-city concentration · Houston
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
717
11-50
346
51-200
97
201-500
24
501-1,000
5
1,001-5,000
4

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 1,195 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 energy recovery consulting firms, 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 “energy recovery consulting firms”. 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 energy recovery consulting firms), 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 energy recovery consulting firms, 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, 7,419 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 28, 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.

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 energy recovery consulting firms, 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 energy recovery consulting firms are there based in the United States?

RevenueBase identified 1,195 energy recovery consulting firms 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?

Willdan, headquartered in Anaheim, tops this list with the largest team on record.

Which city has the most energy recovery consulting firms?

Houston leads with 57 headquartered companies, followed by New York (44) and Dallas (21).

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 7,419 verified decision-maker contacts tracked across these 1,195 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 28, 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.