Company lists · Data refreshed September 2026

Top 25 Power plant engineering firms based in the United States

Name: Power plant engineering 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 17, 2026 650 companies tracked

RevenueBase identified 650 company matches for power plant engineering firms associated with the United States as of September 2026 and tracks 69,108 professional contacts across them, including 21,748 with verified work emails. Houston is the largest hub.

This list covers company matches for power plant engineering firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

650Companies

69,108Contacts tracked

21,748Verified emails

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

Ranked by team size

Top 25 of 650 company matches for power plant engineering firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Mcdermott International, LTD	Exact match	Houston, TX, United StatesHQ recorded Sep 17, 2026	10001+	20,135 contacts →
	Exact match “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Mortenson	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 17, 2026	5,001-10,000	5,298 contacts →
	Exact match “Mortenson is a U.S-based, top-25 builder, developer and provider of energy and engineering services committed to helping organizations move their strategies forward.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Sargent & Lundy	Exact match	Chicago, WY, United StatesHQ recorded Sep 17, 2026	1,001-5,000	4,156 contacts →
	Exact match “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Fieldcore	Exact match	Atlanta, GA, United StatesHQ recorded Sep 17, 2026	10001+	3,700 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	S&b	Exact match	Houston, TX, United StatesHQ recorded Sep 17, 2026	5,001-10,000	3,510 contacts →
	Exact match “S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	FTI	Exact match	Menasha, WI, United StatesHQ recorded Sep 17, 2026	1,001-5,000	2,741 contacts →
	Exact match “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	NAES	Exact match	Issaquah, WA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	1,956 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	NPL Construction CO	Exact match	Phoenix, AZ, United StatesHQ recorded Sep 17, 2026	5,001-10,000	1,358 contacts →
	Exact match “NPL is a nationally recognized leader in energy infrastructure construction, with 50 years of experience.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	PIC Group, INC	Exact match	Atlanta, GA, United StatesHQ recorded Sep 17, 2026	201-500	1,107 contacts →
	Exact match “PIC Group, Inc, established in 1988 and headquartered in Atlanta, GA, is a global provider of service solutions to the power generation industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Gulf Companies	Exact match	Houston, TX, United StatesHQ recorded Sep 17, 2026	1,001-5,000	1,046 contacts →
	Exact match “At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Mesa Associates, INC	Exact match	Madison, AL, United StatesHQ recorded Sep 17, 2026	1,001-5,000	897 contacts →
	Exact match “Mesa is a full service engineering, procurement, and construction management firm specializing in providing engineering services to electric utility, heavy industrial, and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Proenergy	Exact match	Sedalia, MO, United StatesHQ recorded Sep 17, 2026	501-1,000	749 contacts →
	Exact match “PROENERGY is an engineering, R&D, and manufacturing powerhouse.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Brahma Group, INC	Exact match	Salt Lake City, UT, United StatesHQ recorded Sep 17, 2026	1,001-5,000	581 contacts →
	Exact match “Brahma Group, Inc.(Brahma) is a full service project management and industrial construction company, with active projects nationwide.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Vanderweil Engineers	Exact match	Boston, MA, United StatesHQ recorded Sep 17, 2026	201-500	545 contacts →
	Exact match “Vanderweil is a mechanical, electrical, plumbing, fire protection, technology, sustainability, commissioning, and power engineering firm dedicated to providing customized and…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Arb, INC	Exact match	Irvine, CA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	528 contacts →
	Exact match “ARB Inc.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	APR Energy	Exact match	Jacksonville, FL, United StatesHQ recorded Sep 17, 2026	201-500	502 contacts →
	Exact match “APR Energy delivers reliable electricity, fast.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	RRC Companies	Exact match	Round Rock, TX, United StatesHQ recorded Sep 17, 2026	201-500	494 contacts →
	Exact match “RRC is a top-tier designer of utility-scale wind, solar, energy storage, data center, and oil & gas projects in the US and select international markets.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	EC Electric	Exact match	Portland, OR, United StatesHQ recorded Sep 17, 2026	1,001-5,000	490 contacts →
	Exact match “Our lives function on a power grid.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Babcock Power	Exact match	Danvers, MA, United StatesHQ recorded Sep 17, 2026	501-1,000	476 contacts →
	Exact match “Finding a single capable partner to support both large- and small-scale power generation needs can be challenging.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Scmi INC	Exact match	Houston, TX, United StatesHQ recorded Sep 17, 2026	n/a	470 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	GSE Solutions	Exact match	Columbia, MD, United StatesHQ recorded Sep 17, 2026	201-500	404 contacts →
	Exact match “GSE Solutions supports nuclear power and clean-energy fleets worldwide through integrated engineering services and software that strengthen operational performance.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Hooper	Exact match	De Forest, WI, United StatesHQ recorded Sep 17, 2026	501-1,000	370 contacts →
	Exact match “Hooper Corporation is your full-service electric power and mechanical contractor.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Gemma Power Systems	Exact match	Glastonbury, CT, United StatesHQ recorded Sep 17, 2026	51-200	353 contacts →
	Exact match “Gemma Power Systems, a wholly owned subsidiary of Argan Inc.(NYSE: AGX), is a leading Engineering, Procurement and Construction (EPC) company providing innovative solutions for…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	NEI Electric Power Engineering, INC	Exact match	Lakewood, CO, United StatesHQ recorded Sep 17, 2026	201-500	318 contacts →
	Exact match “NEI provides professional expertise and design engineering services for all aspects of power systems engineering.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Infrastructure And Energy Alternatives, Inc. IEA , A Mastec Company	Exact match	Indianapolis, IN, United StatesHQ recorded Sep 17, 2026	5,001-10,000	318 contacts →
	Exact match “Infrastructure & Energy Alternatives (IEA), a MasTec company, was formed in 2011 and began building an integrated portfolio of energy and infrastructure construction companies.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “power plant engineering firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 650 power plant engineering firms based in the United States

See the full list, filter by size, metro and specialty, and access 21,748 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Sep 17, 2026

31.5%Verified-email coverage

106.3Average contacts per company

11-50Median size (employees)

4.0%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

263

11-50

208

51-200

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 650 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “power plant engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 21,748 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “power plant engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many power plant engineering firms are there based in the United States?

RevenueBase identified 650 company matches for power plant engineering firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Mcdermott International, LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most power plant engineering firms?

Houston leads with 26 company records, followed by Austin (8) and Charlotte (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 21,748 professional contacts with verified work emails tracked across these 650 companies; direct dials are available where recorded.

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.

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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 SmartSearch, 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.