Company lists · Data refreshed September 2026

Top 25 Critical power infrastructure companies based in the United States

Name: Critical power infrastructure companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,236 companies tracked

RevenueBase identified 1,236 critical power infrastructure companies headquartered in the United States as of September 2026 and tracks 109,619 professional contacts across them, including 41,347 with verified work emails. Houston is the largest hub.

This list covers critical power infrastructure companies 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 19, 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 19, 2026 86% judged on-target in blind review

1,236Companies

109,619Contacts tracked

41,347Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest critical power infrastructure companies based in the United States

Ranked by team size

Top 25 of 1,236 critical power infrastructure companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to critical power infrastructure companies: 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	Vertiv	Strong evidence	Columbus, OH, United StatesHQ checked Sep 19, 2026	10001+	14,610 contacts →
	Strong evidence “Vertiv is a global leader in critical digital infrastructure for applications in data centers, communication networks, and commercial and industrial environments.” Source: RevenueBase Database · checked Sep 19, 2026
2	Constellation	Indirect evidence	Baltimore, MD, United StatesHQ checked Sep 19, 2026	10001+	9,458 contacts →
	Indirect evidence “Constellation Energy Corporation (Nasdaq: CEG), a Fortune 200 company headquartered in Baltimore, is the nation’s largest producer of reliable, emissions-free energy and a leading…” Source: RevenueBase Database · checked Sep 19, 2026
3	Nextera Energy Resources	Partial evidence	Juno Beach, FL, United StatesHQ checked Sep 19, 2026	10001+	6,221 contacts →
	Partial evidence “NextEra Energy Resources, LLC, together with its affiliated entities,("NextEra Energy Resources") is one of the largest energy infrastructure companies in North America.” Source: RevenueBase Database · checked Sep 19, 2026
4	Primoris Services Corporation	Strong evidence	Dallas, TX, United StatesHQ checked Sep 19, 2026	10001+	4,089 contacts →
	Strong evidence “Primoris Services Corporation (NYSE: PRIM) is a leading provider of critical infrastructure services to the utility, energy, and renewables markets throughout the United States…” Source: RevenueBase Database · checked Sep 19, 2026
5	Fieldcore	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 19, 2026	10001+	3,700 contacts →
	Partial evidence “GE Vernova is a planned, purpose-built global energy company that includes Power, Wind, and Electrification businesses and is supported by its accelerator businesses of Advanced…” Source: RevenueBase Database · checked Sep 19, 2026
6	M.C. Dean, INC	Indirect evidence	Tysons, VA, United StatesHQ checked Sep 19, 2026	5,001-10,000	2,761 contacts →
	Indirect evidence “M.C.” Source: RevenueBase Database · checked Sep 19, 2026
7	Vistra Corp	Partial evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	2,466 contacts →
	Partial evidence “Vistra (NYSE: VST) is a leading Fortune 500 integrated retail electricity and power generation company, based in Irving, Texas, that provides essential resources to customers…” Source: RevenueBase Database · checked Sep 19, 2026
8	Invenergy	Strong evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,408 contacts →
	Strong evidence “Invenergy is North America’s largest privately held developer, owner, and operator of innovative, reliable power infrastructure.” Source: RevenueBase Database · checked Sep 19, 2026
9	Rehlko	Partial evidence	Milwaukee, WI, United StatesHQ checked Sep 19, 2026	5,001-10,000	1,709 contacts →
	Partial evidence “Rehlko is a global leader in energy resilience, delivering the solutions critical to sustain and improve life.” Source: RevenueBase Database · checked Sep 19, 2026
10	Santee Cooper	Partial evidence	Moncks Corner, SC, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,393 contacts →
	Partial evidence “Santee Cooper is South Carolina’s largest power producer, the largest Green Power generator and the ultimate source of electricity for 2 million people across the state.” Source: RevenueBase Database · checked Sep 19, 2026
11	Shermco Industries	Indirect evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,221 contacts →
	Indirect evidence “Shermco Industries is a provider of safe, reliable testing, repair, professional training, electrical outage planning, maintenance and analysis of rotating apparatus and…” Source: RevenueBase Database · checked Sep 19, 2026
12	Talen Energy	Strong evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,100 contacts →
	Strong evidence “Talen Energy (NASDAQ: TLN) is a leading independent power producer and energy infrastructure company dedicated to powering the future.” Source: RevenueBase Database · checked Sep 19, 2026
13	MYR Group	Indirect evidence	Thornton, CO, United StatesHQ checked Sep 19, 2026	5,001-10,000	1,092 contacts →
	Indirect evidence “With roots dating to 1891 and 8,500+ employees, MYR Group Inc.” Source: RevenueBase Database · checked Sep 19, 2026
14	Industrial Electric Mfg. IEM	Partial evidence	Fremont, CA, United StatesHQ checked Sep 19, 2026	1,001-5,000	969 contacts →
	Partial evidence “Industrial Electric Mfg.(IEM) is the largest independent full-line manufacturer of electrical distribution equipment and integrated power systems in the U.S.” Source: RevenueBase Database · checked Sep 19, 2026
15	Electrical Consultants, INC	Indirect evidence	Billings, MT, United StatesHQ checked Sep 19, 2026	1,001-5,000	890 contacts →
	Indirect evidence “Electrical Consultants, Inc.(ECI) is an employee-owned, national provider of high voltage transmission, substation, and distribution solutions.” Source: RevenueBase Database · checked Sep 19, 2026
16	Bernhard	Indirect evidence	Metairie, LA, United StatesHQ checked Sep 19, 2026	1,001-5,000	721 contacts →
	Indirect evidence “As of May 1, 2025, Bernhard is now ENFRA.” Source: RevenueBase Database · checked Sep 19, 2026
17	Dynegy	Partial evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	705 contacts →
	Partial evidence “At Dynegy, we deliver more than just power to residential, municipal, commercial, and industrial customers across several states.” Source: RevenueBase Database · checked Sep 19, 2026
18	Nvent Hoffman	Partial evidence	Anoka, MN, United StatesHQ checked Sep 19, 2026	10001+	627 contacts →
	Partial evidence “nVent HOFFMAN leading designer and manufacturer of systems that safely and reliably protect the electronic controls and mission critical electrical systems in industrial, data…” Source: RevenueBase Database · checked Sep 19, 2026
19	Alterman, INC	Indirect evidence	Live Oak, TX, United StatesHQ checked Sep 19, 2026	501-1,000	597 contacts →
	Indirect evidence “Since 1923, Alterman has provided electrical construction on many of San Antonio and Austin's most impressive landmarks and contemporary structures.” Source: RevenueBase Database · checked Sep 19, 2026
20	Hunt Electric	Indirect evidence	Eagan, MN, United StatesHQ checked Sep 19, 2026	1,001-5,000	524 contacts →
	Indirect evidence “Hunt Electric is a national electrical design, build, and maintenance firm based in Eagan, MN.” Source: RevenueBase Database · checked Sep 19, 2026
21	Saber Power	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	521 contacts →
	Partial evidence “Saber Power Services, a portfolio company of Greenbelt Capital Partners, is a fully integrated electrical power system services firm providing end-to-end solutions across utility…” Source: RevenueBase Database · checked Sep 19, 2026
22	Resa Power	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	511 contacts →
	Partial evidence “RESA Power is your ONE-STOP for all of your power needs.” Source: RevenueBase Database · checked Sep 19, 2026
23	APR Energy	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 19, 2026	201-500	502 contacts →
	Indirect evidence “APR Energy delivers reliable electricity, fast.” Source: RevenueBase Database · checked Sep 19, 2026
24	Qualitrol	Partial evidence	Fairport, NY, United StatesHQ checked Sep 19, 2026	501-1,000	494 contacts →
	Partial evidence “Qualitrol is a global leader in electrical grid monitoring solutions for businesses that manage, operate, or support the power grid.” Source: RevenueBase Database · checked Sep 19, 2026
25	EC Electric	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1,001-5,000	490 contacts →
	Partial evidence “Our lives function on a power grid.” Source: RevenueBase Database · checked Sep 19, 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: critical power infrastructure companies. 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 critical power infrastructure companies.
Partial evidence: Its own public description names part of critical power infrastructure companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name critical power infrastructure companies. 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 1,236 critical power infrastructure companies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 41,347 reachable decision-makers.

Free signup · no credit card

View the full list →

Critical power infrastructure companies based in the United States at a glance

As of Sep 19, 2026

37.7%Verified-email coverage

88.7Average contacts per company

11-50Median size (employees)

4.8%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

421

11-50

438

51-200

205

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 1,236 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 critical power infrastructure companies, 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 “critical power infrastructure companies”. 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 critical power infrastructure companies), 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 critical power infrastructure companies, 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, 41,347 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 19, 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.

Critical power infrastructure companies by metro

Critical power infrastructure companies in Houston59

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 critical power infrastructure companies, 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 critical power infrastructure companies are there based in the United States?

RevenueBase identified 1,236 critical power infrastructure companies 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?

Vertiv, headquartered in Columbus, tops this list with the largest team on record.

Which city has the most critical power infrastructure companies?

Houston leads with 59 headquartered companies, followed by Miami (19) and Charlotte (14).

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 41,347 verified decision-maker contacts tracked across these 1,236 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 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,236 critical power infrastructure companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Critical power infrastructure companies by geography

Browse the directory

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.