Company lists · Data refreshed September 2026

Top 25 Utility consulting firms based in the United States

RevenueBase identified 1,755 utility consulting firms headquartered in the United States as of September 2026 and tracks 43,854 professional contacts across them, including 20,573 with verified work emails and 19,467 with mobile numbers. Houston is the largest hub.

This list covers utility 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 6, 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 6, 2026 86% judged on-target in blind review
1,755Companies
43,854Contacts tracked
20,573Verified emails
19,467Mobile numbers
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The 25 largest utility consulting firms based in the United States

Ranked by team size
Top 25 of 1,755 utility consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to utility 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 evidenceAustin, TX, United StatesHQ checked Sep 6, 20261,001-5,0002,121 contacts →

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

Source: company website · checked Sep 6, 2026
2Partial evidenceMount Airy, NC, United StatesHQ checked Sep 6, 202610001+2,082 contacts →

“The Pike family of companies is a leading provider of utilities solutions to over 300 investor-owned, municipal and cooperative utilities in the United States.”

Source: company website · checked Sep 6, 2026
3Indirect evidencePlano, TX, United StatesHQ checked Sep 6, 20261,001-5,0001,661 contacts →

“At Westwood, our purpose is to create a better world for people through our work.”

Source: company website · checked Sep 6, 2026
4Strong evidenceKent, OH, United StatesHQ checked Sep 6, 20261,001-5,0001,395 contacts →

“Davey Resource Group, Inc.(DRG) provides innovative consulting and field services that support utility infrastructure and environmental stewardship.”

Source: company website · checked Sep 6, 2026
5Indirect evidenceFramingham, MA, United StatesHQ checked Sep 6, 20261,001-5,0001,383 contacts →

“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: company website · checked Sep 6, 2026
6Partial evidenceMinneapolis, MN, United StatesHQ checked Sep 6, 20261,001-5,0001,088 contacts →

“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.”

Source: company website · checked Sep 6, 2026
7Partial evidenceHomestead, PA, United StatesHQ checked Sep 6, 2026501-1,000964 contacts →

“Transforming ideas into reality® since 1958, GAI Consultants is an engineering, planning, and environmental consulting firm that provides customized solutions and local expertise…”

Source: company website · checked Sep 6, 2026
8Strong evidenceAnaheim, CA, United StatesHQ checked Sep 6, 20261,001-5,000851 contacts →

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

Source: company website · checked Sep 6, 2026
9Indirect evidenceCleveland, OK, United StatesHQ checked Sep 6, 20261,001-5,000761 contacts →

“Cleveland Integrity Services offers support services to companies in the Energy, Telecommunications, and Power industries.”

Source: company website · checked Sep 6, 2026
10Indirect evidenceMetairie, LA, United StatesHQ checked Sep 6, 2026501-1,000700 contacts →

“EDG Inc.”

Source: company website · checked Sep 6, 2026
11Indirect evidenceLongview, TX, United StatesHQ checked Sep 6, 2026501-1,000578 contacts →

“Since 1991, Applied Consultants Inc.”

Source: company website · checked Sep 6, 2026
12Partial evidenceEmeryville, CA, United StatesHQ checked Sep 6, 2026501-1,000526 contacts →

“Dedicated to “Excellence in Engineering,” E2 Consulting Engineers, Inc.(E2) is a professional services firm established in 1988 specializing in a full spectrum of engineering…”

Source: company website · checked Sep 6, 2026
13Partial evidenceWaukesha, WI, United StatesHQ checked Sep 6, 20261,001-5,000457 contacts →

“Olameter is a leading provider of outsourced utility asset management, network communications, and data services.”

Source: company website · checked Sep 6, 2026
14Partial evidenceTyler, TX, United StatesHQ checked Sep 6, 2026501-1,000448 contacts →

“TechServ Consulting and Training, Ltd was established in November 1992.”

Source: company website · checked Sep 6, 2026
15Partial evidenceWashington, DC, United StatesHQ checked Sep 6, 202651-200434 contacts →

“Synergy Consulting is Global Leader in Financial and Corporate Advisory.”

Source: company website · checked Sep 6, 2026
16Indirect evidenceIrvine, CA, United StatesHQ checked Sep 6, 2026201-500383 contacts →

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

Source: company website · checked Sep 6, 2026
17Partial evidenceHouston, TX, United StatesHQ checked Sep 6, 2026201-500377 contacts →

“For decades, E Source has been a trusted partner to utilities navigating an evolving energy landscape.”

Source: company website · checked Sep 6, 2026
18Indirect evidenceLong Beach, CA, United StatesHQ checked Sep 6, 2026201-500375 contacts →

“P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.”

Source: company website · checked Sep 6, 2026
19Indirect evidenceWilliamsville, NY, United StatesHQ checked Sep 6, 2026201-500355 contacts →

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

Source: company website · checked Sep 6, 2026
20Partial evidencePark Ridge, NJ, United StatesHQ checked Sep 6, 2026201-500336 contacts →

“National Utility Service, Inc.”

Source: company website · checked Sep 6, 2026
21Indirect evidencePhiladelphia, PA, United StatesHQ checked Sep 6, 2026201-500330 contacts →

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

Source: company website · checked Sep 6, 2026
22Indirect evidencePortland, OR, United StatesHQ checked Sep 6, 2026201-500288 contacts →

“At Cascade Energy, we believe in better.”

Source: company website · checked Sep 6, 2026
23Indirect evidenceWillow Grove, PA, United StatesHQ checked Sep 6, 20261,001-5,000284 contacts →

“Asplundh Engineering Services leverages more than 100 years of experience to provide a superior, single-point solution for engineering, design and testing services to…”

Source: company website · checked Sep 6, 2026
24Indirect evidenceDuluth, MN, United StatesHQ checked Sep 6, 2026201-500281 contacts →

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

Source: company website · checked Sep 6, 2026
25Partial evidenceRaleigh, NC, United StatesHQ checked Sep 6, 2026201-500278 contacts →

“Quanta Technology is an expertise-based, independent advisory company providing business and technical expertise to the energy and utility industries.”

Source: company website · checked Sep 6, 2026

Showing 25 of 1,755 utility consulting firms based in the United States

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Utility consulting firms based in the United States at a glance

As of Sep 6, 2026
46.9%Verified-email coverage
44.4%Mobile-number coverage
25.0Average contacts per company
1-10Median size (employees)
5.2%Largest-city concentration · Houston
Sep 6, 2026Page data refreshed

Companies by employee count

1-10
988
11-50
511
51-200
172
201-500
44
501-1,000
12
1,001-5,000
23
10001+
3

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 utility 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 “utility 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 utility 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 utility 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, 20,573 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 6, 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 utility 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 utility consulting firms are there based in the United States?

RevenueBase identified 1,755 utility 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?

Clearesult, headquartered in Austin, tops this list with the largest team on record.

Which city has the most utility consulting firms?

Houston leads with 92 headquartered companies, followed by New York (50) and Denver (32).

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 20,573 verified decision-maker contacts tracked across these 1,755 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 6, 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.