Company lists · Data refreshed September 2026

Top 25 Utilities consulting firms based in the United States

Name: Utilities consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 2,419 companies tracked

RevenueBase identified 2,419 utilities consulting firms headquartered in the United States as of September 2026 and tracks 85,129 professional contacts across them, including 39,529 with verified work emails. Houston is the largest hub.

This list covers utilities 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

2,419Companies

85,129Contacts tracked

39,529Verified emails

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The 25 largest utilities consulting firms based in the United States

Ranked by team size

Top 25 of 2,419 utilities 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 utilities 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Sargent & Lundy	Indirect evidence	Chicago, WY, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,156 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
2	Entrust Solutions Group	Partial evidence	Lisle, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,966 contacts →
	Partial evidence “ENTRUST Solutions Group, an ENR Top 100 company, provides comprehensive and dependable engineering, consulting, and automation services to pipeline companies, gas and electric…” Source: RevenueBase Database · checked Sep 21, 2026
3	Langan Engineering & Environmental Services	Indirect evidence	Parsippany, NJ, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,177 contacts →
	Indirect evidence “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Source: RevenueBase Database · checked Sep 21, 2026
4	Pike Corporation	Partial evidence	Mount Airy, NC, United StatesHQ checked Sep 21, 2026	10001+	2,082 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 21, 2026
5	NAES	Indirect evidence	Issaquah, WA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,956 contacts →
	Indirect evidence “NAES is the power generation industry’s largest independent services provider, with more than 40 years of experience managing risk and turning it into profits.” Source: RevenueBase Database · checked Sep 21, 2026
6	LJA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,932 contacts →
	Indirect evidence “Employee-Owned.” Source: RevenueBase Database · checked Sep 21, 2026
7	Enercon Services, INC	Indirect evidence	Kennesaw, GA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,865 contacts →
	Indirect evidence “ENERCON is a multi-discipline engineering and environmental engineering support services firm focused on delivering safe and efficient solutions for the power, data center and…” Source: RevenueBase Database · checked Sep 21, 2026
8	Westwood Professional Services	Indirect evidence	Plano, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,661 contacts →
	Indirect evidence “At Westwood, our purpose is to create a better world for people through our work.” Source: RevenueBase Database · checked Sep 21, 2026
9	Davey Resource Group, INC	Partial evidence	Kent, OH, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,395 contacts →
	Partial evidence “Davey Resource Group, Inc.(DRG) provides innovative consulting and field services that support utility infrastructure and environmental stewardship.” Source: RevenueBase Database · checked Sep 21, 2026
10	Ameresco	Indirect evidence	Framingham, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,383 contacts →
	Indirect 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
11	Partner Engineering & Science, INC	Indirect evidence	Torrance, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,358 contacts →
	Indirect evidence “Partner Assessment Corp.” Source: RevenueBase Database · checked Sep 21, 2026
12	Atwell, LLC	Partial evidence	Southfield, MI, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,290 contacts →
	Partial evidence “Atwell is a full-service consulting, engineering and construction services firm that delivers a broad range of creative solutions to clients in the real estate and land…” Source: RevenueBase Database · checked Sep 21, 2026
13	Apex Companies	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,137 contacts →
	Indirect evidence “Who is Apex?” Source: RevenueBase Database · checked Sep 21, 2026
14	Barr Engineering CO	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,088 contacts →
	Partial evidence “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Source: RevenueBase Database · checked Sep 21, 2026
15	GAI Consultants, INC	Partial evidence	Homestead, PA, United StatesHQ checked Sep 21, 2026	501-1,000	964 contacts →
	Partial evidence “Transforming ideas into reality® since 1958, GAI Consultants is an engineering, planning, and environmental consulting firm that provides customized solutions and local expertise…” Source: RevenueBase Database · checked Sep 21, 2026
16	Willdan	Strong evidence	Anaheim, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	851 contacts →
	Strong 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
17	DUDEK	Partial evidence	Encinitas, CA, United StatesHQ checked Sep 21, 2026	501-1,000	795 contacts →
	Partial evidence “Dudek is an environmental, planning, and engineering consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
18	Percheron, LLC	Indirect evidence	Katy, TX, United StatesHQ checked Sep 21, 2026	501-1,000	776 contacts →
	Indirect evidence “Percheron streamlines energy infrastructure projects through a comprehensive EPCM (Engineering, Procurement, Construction Management) approach.” Source: RevenueBase Database · checked Sep 21, 2026
19	Cleveland Integrity Services	Indirect evidence	Cleveland, OK, United StatesHQ checked Sep 21, 2026	1,001-5,000	761 contacts →
	Indirect evidence “Cleveland Integrity Services offers support services to companies in the Energy, Telecommunications, and Power industries.” Source: RevenueBase Database · checked Sep 21, 2026
20	Capco Energy	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	715 contacts →
	Partial evidence “For 25 years Capco’s Energy practice has combined innovative thinking with deep industry knowledge to provide business consulting, digital transformation and technology services…” Source: RevenueBase Database · checked Sep 21, 2026
21	EDG	Indirect evidence	Metairie, LA, United StatesHQ checked Sep 21, 2026	501-1,000	700 contacts →
	Indirect evidence “EDG Inc.” Source: RevenueBase Database · checked Sep 21, 2026
22	HBK Engineering, LLC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	501-1,000	674 contacts →
	Indirect evidence “HBK Engineering, LLC a Quanta Services Company is a fully licensed, professional engineering design firm headquartered in downtown Chicago providing civil, environmental…” Source: RevenueBase Database · checked Sep 21, 2026
23	Dycom Industries, INC	Indirect evidence	West Palm Beach, FL, United StatesHQ checked Sep 21, 2026	10001+	662 contacts →
	Indirect evidence “Dycom (NYSE: DY) is on a mission to connect America.” Source: RevenueBase Database · checked Sep 21, 2026
24	Electric Power Engineers	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	501-1,000	630 contacts →
	Indirect evidence “Electric Power Engineers (EPE) is a global advisory and engineering firm advancing grid reliability, resilience, flexibility, and affordability.” Source: RevenueBase Database · checked Sep 21, 2026
25	The Energy Authority	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 21, 2026	201-500	595 contacts →
	Indirect evidence “The Energy Authority (TEA®) is the strategic partner of choice in providing energy solutions to public power.” Source: RevenueBase Database · checked Sep 21, 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: utilities consulting firms. 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 utilities consulting firms.
Partial evidence: Its own public description names part of utilities consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name utilities consulting firms. 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 2,419 utilities consulting firms based in the United States

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Utilities consulting firms based in the United States at a glance

As of Sep 21, 2026

46.4%Verified-email coverage

35.2Average contacts per company

1-10Median size (employees)

6.4%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

1,241

11-50

729

51-200

278

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 2,419 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 utilities 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 “utilities 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 utilities 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 utilities 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, 39,529 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.

Utilities consulting firms by metro

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 utilities 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 utilities consulting firms are there based in the United States?

RevenueBase identified 2,419 utilities 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 utilities consulting firms?

Houston leads with 154 headquartered companies, followed by New York (64) and Chicago (37).

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 39,529 verified decision-maker contacts tracked across these 2,419 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.