Company lists · Data refreshed September 2026

Top 25 Energy management consulting firms based in the United States

RevenueBase identified 3,011 energy management consulting firms headquartered in the United States as of September 2026 and tracks 52,321 professional contacts across them, including 22,365 with verified work emails. Houston is the largest hub.

This list covers energy management 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 21, 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 21, 2026 86% judged on-target in blind review
3,011Companies
52,321Contacts tracked
22,365Verified emails
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The 25 largest energy management consulting firms based in the United States

Ranked by team size
Top 25 of 3,011 energy management consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to energy management 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
1Indirect evidenceChicago, WY, United StatesHQ checked Sep 21, 20261,001-5,0004,156 contacts →

Indirect evidence

“Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.”

Source: RevenueBase Database · checked Sep 21, 2026
2Partial evidenceAustin, TX, United StatesHQ checked Sep 21, 20261,001-5,0002,121 contacts →

Partial evidence

“CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.”

Source: RevenueBase Database · checked Sep 21, 2026
3Strong evidencePhoenix, AZ, United StatesHQ checked Sep 21, 20261,001-5,0001,629 contacts →

Strong evidence

“Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.”

Source: RevenueBase Database · checked Sep 21, 2026
4Partial evidenceFramingham, MA, United StatesHQ checked Sep 21, 20261,001-5,0001,383 contacts →

Partial evidence

“Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…”

Source: RevenueBase Database · checked Sep 21, 2026
5Partial evidenceAustin, TX, United StatesHQ checked Sep 21, 2026n/a1,145 contacts →

Partial evidence

“OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.”

Source: RevenueBase Database · checked Sep 21, 2026
6Partial evidenceAnaheim, CA, United StatesHQ checked Sep 21, 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 21, 2026
7Partial evidencePortland, OR, United StatesHQ checked Sep 21, 2026201-500744 contacts →

Partial evidence

“PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.”

Source: RevenueBase Database · checked Sep 21, 2026
8Partial evidenceHalf Moon Bay, CA, United StatesHQ checked Sep 21, 2026501-1,000733 contacts →

Partial evidence

“Resource Innovations (RI) is an energy transformation firm.”

Source: RevenueBase Database · checked Sep 21, 2026
9Indirect evidenceLongview, TX, United StatesHQ checked Sep 21, 2026501-1,000578 contacts →

Indirect evidence

“Since 1991, Applied Consultants Inc.”

Source: RevenueBase Database · checked Sep 21, 2026
10Strong evidenceCarmel, IN, United StatesHQ checked Sep 21, 2026201-500478 contacts →

Strong evidence

“ACES is a nationwide energy management company that helps its clients buy, sell, and manage the complexity of the U.S.”

Source: RevenueBase Database · checked Sep 21, 2026
11Partial evidenceMinneapolis, MN, United StatesHQ checked Sep 21, 2026501-1,000450 contacts →

Partial evidence

“SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.”

Source: RevenueBase Database · checked Sep 21, 2026
12Partial evidenceIrvine, CA, United StatesHQ checked Sep 21, 2026201-500383 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 21, 2026
13Indirect evidenceLong Beach, CA, United StatesHQ checked Sep 21, 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 21, 2026
14Strong evidenceWilliamsville, NY, United StatesHQ checked Sep 21, 2026201-500355 contacts →

Strong evidence

“Wendel is an Architecture, Engineering, Energy Efficiency, and Construction Management Firm that delivers customized solutions and turnkey projects in innovative ways.”

Source: RevenueBase Database · checked Sep 21, 2026
15Strong evidenceAshburn, VA, United StatesHQ checked Sep 21, 2026501-1,000353 contacts →

Strong evidence

“Hanley Energy are global innovators in Critical Power and Energy Management solutions, with a stable of world-class engineers shared between European headquarters in Ireland…”

Source: RevenueBase Database · checked Sep 21, 2026
16Indirect evidencePark Ridge, NJ, United StatesHQ checked Sep 21, 2026201-500336 contacts →

Indirect evidence

“National Utility Service, Inc.”

Source: RevenueBase Database · checked Sep 21, 2026
17Partial evidencePhiladelphia, PA, United StatesHQ checked Sep 21, 2026201-500330 contacts →

Partial evidence

“Customized Energy Solutions is at the forefront of competitive energy markets.”

Source: RevenueBase Database · checked Sep 21, 2026
18Partial evidencePortland, OR, United StatesHQ checked Sep 21, 2026201-500288 contacts →

Partial evidence

“At Cascade Energy, we believe in better.”

Source: RevenueBase Database · checked Sep 21, 2026
19Partial evidenceDuluth, MN, United StatesHQ checked Sep 21, 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 21, 2026
20Indirect evidenceLancaster, NY, United StatesHQ checked Sep 21, 20265,001-10,000278 contacts →

Indirect evidence

“E&E is now WSP USA.”

Source: RevenueBase Database · checked Sep 21, 2026
21Indirect evidenceAustin, CA, United StatesHQ checked Sep 21, 2026201-500275 contacts →

Indirect evidence

“The world runs on power.”

Source: RevenueBase Database · checked Sep 21, 2026
22Strong evidenceKirkland, WA, United StatesHQ checked Sep 21, 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 21, 2026
23Partial evidenceFort Washington, PA, United StatesHQ checked Sep 21, 2026201-500252 contacts →

Partial evidence

“CMC Energy Services is a woman-owned full-service energy efficiency company with nearly 50 years of experience delivering value-based energy conservation services.”

Source: RevenueBase Database · checked Sep 21, 2026
24Strong evidenceRenton, WA, United StatesHQ checked Sep 21, 2026201-500248 contacts →

Strong evidence

“Mosaic is a consulting firm that delivers custom solutions across the energy, utility, grid operations, and grid modernization space.”

Source: RevenueBase Database · checked Sep 21, 2026
25Strong evidenceHouston, TX, United StatesHQ checked Sep 21, 2026201-500233 contacts →

Strong evidence

“At Mantis Innovation, our experts provide data-driven, consultative services designed to optimize your facility, sustainability, and energy management strategies, while ultimately…”

Source: RevenueBase Database · checked Sep 21, 2026

Showing 25 of 3,011 energy management consulting firms based in the United States

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

As of Sep 21, 2026
42.7%Verified-email coverage
17.4Average contacts per company
1-10Median size (employees)
4.5%Largest-city concentration · Houston
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
1,719
11-50
944
51-200
258
201-500
55
501-1,000
12
1,001-5,000
16
5,001-10,000
1
10001+
3

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 3,011 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 management 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 management 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 management 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 management 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, 22,365 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 21, 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 management 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 management consulting firms are there based in the United States?

RevenueBase identified 3,011 energy management 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?

Sargent & Lundy, headquartered in Casper, tops this list with the largest team on record.

Which city has the most energy management consulting firms?

Houston leads with 136 headquartered companies, followed by New York (122) and Chicago (56).

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 22,365 verified decision-maker contacts tracked across these 3,011 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 21, 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.