Company lists · Data refreshed September 2026

Top 25 Mechanical contractors for industrial plants based in the United States

Name: Mechanical contractors for industrial plants 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 7,473 companies tracked

RevenueBase identified 7,473 mechanical contractors for industrial plants headquartered in the United States as of September 2026 and tracks 199,678 professional contacts across them, including 67,933 with verified work emails. Houston is the largest hub.

This list covers mechanical contractors for industrial plants 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

7,473Companies

199,678Contacts tracked

67,933Verified emails

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The 25 largest mechanical contractors for industrial plants based in the United States

Ranked by team size

Top 25 of 7,473 mechanical contractors for industrial plants 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 mechanical contractors for industrial plants: 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	Turner Industries	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	10001+	8,018 contacts →
	Partial evidence “Turner Industries provides a single solution in heavy industrial construction, maintenance, turnaround, pipe and module fabrication, equipment, rigging and specialized…” Source: RevenueBase Database · checked Sep 17, 2026
2	Zachry Group	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	10001+	6,824 contacts →
	Indirect evidence “Zachry Group is North America's pacesetter in turnkey engineering, construction, maintenance, turnaround and fabrication services to the energy, chemicals, power, manufacturing…” Source: RevenueBase Database · checked Sep 17, 2026
3	Team, INC	Indirect evidence	Sugar Land, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,460 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
4	Performance Contractors	Strong evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,757 contacts →
	Strong evidence “We began as a merit shop general industrial contractor back in 1979.” Source: RevenueBase Database · checked Sep 17, 2026
5	Acco Engineered Systems	Partial evidence	Pasadena, CA, United StatesHQ checked Sep 17, 2026	5,001-10,000	2,415 contacts →
	Partial evidence “Since 1934, owners and builders have selected ACCO Engineered Systems to design, install, and maintain more than mechanical projects.” Source: RevenueBase Database · checked Sep 17, 2026
6	Brown & Root Industrial Services, LLC	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	5,001-10,000	1,940 contacts →
	Partial evidence “Brown & Root Industrial Services offers the full range of industrial services – engineering, construction, maintenance, turnaround, and specialty (painting, scaffolding…” Source: RevenueBase Database · checked Sep 17, 2026
7	Tdindustries, INC	Partial evidence	Dallas, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,909 contacts →
	Partial evidence “TDIndustries delivers a comprehensive approach to Facility Services and Mechanical Construction.” Source: RevenueBase Database · checked Sep 17, 2026
8	Bilfinger North America	Indirect evidence	The Woodlands, TX, United StatesHQ checked Sep 17, 2026	10001+	1,400 contacts →
	Indirect evidence “As a leading construction and maintenance provider, Bilfinger aims to enhance the efficiency of assets and lower operational costs.” Source: RevenueBase Database · checked Sep 17, 2026
9	Emcor Group, INC	Strong evidence	Norwalk, CT, United StatesHQ checked Sep 17, 2026	10001+	1,383 contacts →
	Strong evidence “A Fortune 500® company and a member of the S&P 500, EMCOR Group, Inc.(NYSE: EME) is a leader in mechanical and electrical construction, industrial and energy infrastructure, and…” Source: RevenueBase Database · checked Sep 17, 2026
10	CCC Group, INC	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,353 contacts →
	Indirect evidence “Group, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
11	Comfort Systems USA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	1,330 contacts →
	Indirect evidence “Comfort Systems USA \| Quality People.” Source: RevenueBase Database · checked Sep 17, 2026
12	Macdonald-Miller Facility Solutions	Strong evidence	Seatac, WA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,303 contacts →
	Strong evidence “MacDonald-Miller Facility Solutions is a full-service, design-build mechanical contractor in the Pacific Northwest.” Source: RevenueBase Database · checked Sep 17, 2026
13	Strike	Indirect evidence	Spring, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,155 contacts →
	Indirect evidence “Strike safely and reliably delivers the specialized asset maintenance, construction, and contracting services that are business-critical to the energy, chemical, manufacturing…” Source: RevenueBase Database · checked Sep 17, 2026
14	Mckenney's, INC	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,077 contacts →
	Indirect evidence “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Source: RevenueBase Database · checked Sep 17, 2026
15	Excel Group	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,042 contacts →
	Partial evidence “EXCEL is a leading provider of industrial construction services, including maintenance, turnarounds, fabrication, and disaster recovery.” Source: RevenueBase Database · checked Sep 17, 2026
16	Harris	Strong evidence	St Paul, MN, United StatesHQ checked Sep 17, 2026	1,001-5,000	982 contacts →
	Strong evidence “Harris is a leading national mechanical contractor specializing in design and engineering, construction, controls, service, manufacturing, conveyors and end-to-end building…” Source: RevenueBase Database · checked Sep 17, 2026
17	Cmta, INC	Indirect evidence	Louisville, KY, United StatesHQ checked Sep 17, 2026	501-1,000	936 contacts →
	Indirect evidence “CMTA is part of Legence, a Nasdaq Listed company.” Source: RevenueBase Database · checked Sep 17, 2026
18	Starcon International, INC	Strong evidence	La Porte, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	866 contacts →
	Strong evidence “Starcon is a national, full-service contractor offering comprehensive industrial and mechanical services in the oil & gas/refining, chemical/petrochemical, natural gas processing…” Source: RevenueBase Database · checked Sep 17, 2026
19	AHERN	Strong evidence	Fond Du Lac, WI, United StatesHQ checked Sep 17, 2026	1,001-5,000	849 contacts →
	Strong evidence “Ahern is a mechanical and fire protection contractor specializing in HVAC, Plumbing, Building Controls, Sprinkler, Extinguisher & Alarm and Fabrication for construction and…” Source: RevenueBase Database · checked Sep 17, 2026
20	The Waldinger Corporation	Strong evidence	Des Moines, IA, United StatesHQ checked Sep 17, 2026	1,001-5,000	842 contacts →
	Strong evidence “Established in 1906, The Waldinger Corporation is a premier mechanical, electrical, sheet metal and service contractor operating under a people-first approach.” Source: RevenueBase Database · checked Sep 17, 2026
21	Kinetics	Strong evidence	Livermore, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	734 contacts →
	Strong evidence “Founded in 1973, Kinetics is a full-service process and mechanical contractor specializing in the design and installation of process, mechanical, plumbing and HVAC systems.” Source: RevenueBase Database · checked Sep 17, 2026
22	Wyatt Field Service Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	686 contacts →
	Indirect evidence “WYATT is recognized for executing complex maintenance, outage, turnaround, and capital construction projects across the Oil, Gas & Chemical, and Power markets.” Source: RevenueBase Database · checked Sep 17, 2026
23	Apollo Mechanical Contractors	Partial evidence	Kennewick, WA, United StatesHQ checked Sep 17, 2026	1,001-5,000	682 contacts →
	Partial evidence “Apollo is based in Kennewick, Washington, performing Full Mechanical projects across the United States and around the world.” Source: RevenueBase Database · checked Sep 17, 2026
24	Harder Mechanical Contractors, INC	Strong evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	1,001-5,000	656 contacts →
	Strong evidence “Harder Mechanical is a nationally recognized contractor known for its strong safety culture, ability to meet demanding schedules, commitment to quality, and consistent delivery of…” Source: RevenueBase Database · checked Sep 17, 2026
25	Baker Group	Strong evidence	Ankeny, IA, United StatesHQ checked Sep 17, 2026	1,001-5,000	655 contacts →
	Strong evidence “Established in 1963, Baker Group is Iowa’s premier full-service specialty contractor-serving commercial, industrial, institutional, and mission-critical markets across the country.” 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: mechanical contractors for industrial plants. 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 mechanical contractors for industrial plants.
Partial evidence: Its own public description names part of mechanical contractors for industrial plants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name mechanical contractors for industrial plants. 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 7,473 mechanical contractors for industrial plants based in the United States

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Mechanical contractors for industrial plants based in the United States at a glance

As of Sep 17, 2026

34.0%Verified-email coverage

26.7Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

2,109

11-50

2,884

51-200

1,748

201-500

433

501-1,000

145

1,001-5,000

102

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 7,473 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 mechanical contractors for industrial plants, 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 “mechanical contractors for industrial plants”. 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 mechanical contractors for industrial plants), 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 mechanical contractors for industrial plants, 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, 67,933 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.

Mechanical contractors for industrial plants 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 mechanical contractors for industrial plants, 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 mechanical contractors for industrial plants are there based in the United States?

RevenueBase identified 7,473 mechanical contractors for industrial plants 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?

Turner Industries, headquartered in Baton Rouge, tops this list with the largest team on record.

Which city has the most mechanical contractors for industrial plants?

Houston leads with 152 headquartered companies, followed by New York (77) and Indianapolis (51).

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 67,933 verified decision-maker contacts tracked across these 7,473 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.

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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.