Company lists · Data refreshed September 2026

Top 25 Power plant engineering contractors based in the United States

Name: Power plant engineering contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 506 companies tracked

RevenueBase identified 506 power plant engineering contractors headquartered in the United States as of September 2026 and tracks 59,135 professional contacts across them, including 19,125 with verified work emails. Houston is the largest hub.

This list covers power plant engineering contractors 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 17, 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 17, 2026 86% judged on-target in blind review

506Companies

59,135Contacts tracked

19,125Verified emails

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

The 25 largest power plant engineering contractors based in the United States

Ranked by team size

Top 25 of 506 power plant engineering contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to power plant engineering contractors: 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	Mcdermott International, LTD	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	20,135 contacts →
	Partial evidence “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
2	S&b	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,510 contacts →
	Indirect evidence “S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.” Source: RevenueBase Database · checked Sep 17, 2026
3	FTI	Partial evidence	Menasha, WI, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,741 contacts →
	Partial evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 17, 2026
4	Michels Corporation	Indirect evidence	Brownsville, WI, United StatesHQ checked Sep 17, 2026	10001+	2,339 contacts →
	Indirect evidence “Established in 1959 in Brownsville, WI, Michels is an international leader in energy and infrastructure construction.” Source: RevenueBase Database · checked Sep 17, 2026
5	NAES	Partial evidence	Issaquah, WA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,956 contacts →
	Partial 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 17, 2026
6	Audubon Companies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,488 contacts →
	Indirect evidence “Founded in 1997, Audubon Companies LLC provides EPC, consulting, fabrication, and field services to energy and industrial operators across the globe.” Source: RevenueBase Database · checked Sep 17, 2026
7	NPL Construction CO	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 17, 2026	5,001-10,000	1,358 contacts →
	Indirect evidence “NPL is a nationally recognized leader in energy infrastructure construction, with 50 years of experience.” Source: RevenueBase Database · checked Sep 17, 2026
8	Saulsbury	Strong evidence	Odessa, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,130 contacts →
	Strong evidence “Saulsbury Industries is a full-service Engineering Procurement and Construction (EPC) contractor that provides engineering, general construction, electrical & instrumentation…” Source: RevenueBase Database · checked Sep 17, 2026
9	Gulf Companies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,046 contacts →
	Indirect evidence “At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
10	Wanzek Construction, Inc., A Mastec Company	Partial evidence	Fargo, ND, United StatesHQ checked Sep 17, 2026	1,001-5,000	933 contacts →
	Partial evidence “Wanzek Construction, Inc, a MasTec Renewables company, is a leading general construction contractor and clean energy services company headquartered in Fargo, North Dakota.” Source: RevenueBase Database · checked Sep 17, 2026
11	Mesa Associates, INC	Partial evidence	Madison, AL, United StatesHQ checked Sep 17, 2026	1,001-5,000	897 contacts →
	Partial evidence “Mesa is a full service engineering, procurement, and construction management firm specializing in providing engineering services to electric utility, heavy industrial, and…” Source: RevenueBase Database · checked Sep 17, 2026
12	Percheron, LLC	Partial evidence	Katy, TX, United StatesHQ checked Sep 17, 2026	501-1,000	776 contacts →
	Partial evidence “Percheron streamlines energy infrastructure projects through a comprehensive EPCM (Engineering, Procurement, Construction Management) approach.” Source: RevenueBase Database · checked Sep 17, 2026
13	Proenergy	Partial evidence	Sedalia, MO, United StatesHQ checked Sep 17, 2026	501-1,000	749 contacts →
	Partial evidence “PROENERGY is an engineering, R&D, and manufacturing powerhouse.” Source: RevenueBase Database · checked Sep 17, 2026
14	Prime Electric	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 17, 2026	1,001-5,000	670 contacts →
	Partial evidence “For over a quarter century, Prime has been successfully engineering, constructing building, and facilities solutions for our clientele.” Source: RevenueBase Database · checked Sep 17, 2026
15	PAR Electrical Contractors, LLC	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 17, 2026	1,001-5,000	606 contacts →
	Partial evidence “PAR, a Quanta Services company, offers a full range of construction services for substations, overhead and underground distribution and transmission lines, engineering, design…” Source: RevenueBase Database · checked Sep 17, 2026
16	Quanta Infrastructure Solutions Group	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	538 contacts →
	Indirect evidence “Quanta Infrastructure Solutions Group (QISG) is a recognized leader in EPC, design-build, and CMAR services for electrical infrastructure, wastewater and specialty projects…” Source: RevenueBase Database · checked Sep 17, 2026
17	Arb, INC	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	528 contacts →
	Indirect evidence “ARB Inc.” Source: RevenueBase Database · checked Sep 17, 2026
18	APR Energy	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 17, 2026	201-500	502 contacts →
	Indirect evidence “APR Energy delivers reliable electricity, fast.” Source: RevenueBase Database · checked Sep 17, 2026
19	Matrix Service	Indirect evidence	Tulsa, OK, United StatesHQ checked Sep 17, 2026	1,001-5,000	492 contacts →
	Indirect evidence “Matrix Service is a subsidiary of Matrix Service Company (NASDAQ: MTRX).” Source: RevenueBase Database · checked Sep 17, 2026
20	EC Electric	Partial evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	1,001-5,000	490 contacts →
	Partial evidence “Our lives function on a power grid.” Source: RevenueBase Database · checked Sep 17, 2026
21	Babcock Power	Partial evidence	Danvers, MA, United StatesHQ checked Sep 17, 2026	501-1,000	476 contacts →
	Partial evidence “Finding a single capable partner to support both large- and small-scale power generation needs can be challenging.” Source: RevenueBase Database · checked Sep 17, 2026
22	Campos EPC	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	501-1,000	471 contacts →
	Indirect evidence “Campos EPC (CEPC) is headquartered in Denver, Colorado with offices covering all regions of the United States.” Source: RevenueBase Database · checked Sep 17, 2026
23	Scmi INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	n/a	470 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
24	Ampirical	Strong evidence	Covington, LA, United StatesHQ checked Sep 17, 2026	501-1,000	450 contacts →
	Strong evidence “With an enduring commitment to Engineering Power-ful Solutions, Ampirical offers services with a focus on outstanding quality, value added engineering and successful project…” Source: RevenueBase Database · checked Sep 17, 2026
25	Hooper	Strong evidence	De Forest, WI, United StatesHQ checked Sep 17, 2026	501-1,000	370 contacts →
	Strong evidence “Hooper Corporation is your full-service electric power and mechanical contractor.” Source: RevenueBase Database · checked Sep 17, 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: power plant engineering contractors. 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 power plant engineering contractors.
Partial evidence: Its own public description names part of power plant engineering contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name power plant engineering contractors. 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 506 power plant engineering contractors based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 19,125 reachable decision-makers.

Free signup · no credit card

View the full list →

Power plant engineering contractors based in the United States at a glance

As of Sep 17, 2026

32.3%Verified-email coverage

116.9Average contacts per company

11-50Median size (employees)

6.9%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

147

11-50

161

51-200

105

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 506 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 power plant engineering contractors, 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 “power plant engineering contractors”. 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 power plant engineering contractors), 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 power plant engineering contractors, 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, 19,125 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 17, 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.

Power plant engineering contractors by metro

Power plant engineering contractors in Houston35

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 power plant engineering contractors, 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 power plant engineering contractors are there based in the United States?

RevenueBase identified 506 power plant engineering contractors 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?

Mcdermott International, LTD, headquartered in Houston, tops this list with the largest team on record.

Which city has the most power plant engineering contractors?

Houston leads with 35 headquartered companies, followed by Katy (5) and Midland (5).

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 19,125 verified decision-maker contacts tracked across these 506 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 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 506 power plant engineering contractors based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Power plant engineering contractors by geography

Browse the directory

Browse: Companies home · All United States lists · All Power plant engineering contractors lists · New lists

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.