Company lists · Data refreshed September 2026

Top 25 Industrial assembly contractors based in the United States

Name: Industrial assembly 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 30, 2026 1,930 companies tracked

RevenueBase identified 1,930 industrial assembly contractors headquartered in the United States as of September 2026 and tracks 48,104 professional contacts across them, including 13,915 with verified work emails. Houston is the largest hub.

This list covers industrial assembly 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 30, 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 30, 2026 86% judged on-target in blind review

1,930Companies

48,104Contacts tracked

13,915Verified emails

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The 25 largest industrial assembly contractors based in the United States

Ranked by team size

Top 25 of 1,930 industrial assembly contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to industrial assembly 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	Turner Industries	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 30, 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 30, 2026
2	Performance Contractors	Strong evidence	Baton Rouge, LA, United StatesHQ checked Sep 30, 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 30, 2026
3	Footprint Solutions	Partial evidence	Lisle, IL, United StatesHQ checked Sep 30, 2026	1,001-5,000	618 contacts →
	Partial evidence “Footprint Solutions is the leading nationwide provider of comprehensive installation, merchandising, remodel, assembly, and logistics/supply chain services.” Source: RevenueBase Database · checked Sep 30, 2026
4	Southern Industrial Constructors, INC	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 30, 2026	1,001-5,000	569 contacts →
	Partial evidence “Since 1962, Southern Industrial Constructors, Inc.(SIC) has been safely and cost effectively providing industrial construction services to the manufacturing, process and power…” Source: RevenueBase Database · checked Sep 30, 2026
5	Corbins	Strong evidence	Phoenix, AZ, United StatesHQ checked Sep 30, 2026	1,001-5,000	532 contacts →
	Strong evidence “Corbins is an industrial electrical contractor.” Source: RevenueBase Database · checked Sep 30, 2026
6	The State Group	Strong evidence	Franklin, TN, United StatesHQ checked Sep 30, 2026	1,001-5,000	512 contacts →
	Strong evidence “The State Group is one of North America's leading multi-trade industrial and specialty services contractors.” Source: RevenueBase Database · checked Sep 30, 2026
7	Fori Automation, LLC A Lincoln Electric Company	Partial evidence	Shelby Twp., MI, United StatesHQ checked Sep 30, 2026	501-1,000	447 contacts →
	Partial evidence “Fori Automation, LLC is a global leader in the design, build, and integration of custom material handling, assembly, testing, and welding systems.” Source: RevenueBase Database · checked Sep 30, 2026
8	Atlantic Constructors, INC	Indirect evidence	Richmond, VA, United StatesHQ checked Sep 30, 2026	1,001-5,000	445 contacts →
	Indirect evidence “As a member of the TriplePoint Family of Companies, ACI plays a vital role as part of TriplePoint's platform that is enabling what comes next all across the country.” Source: RevenueBase Database · checked Sep 30, 2026
9	Electroimpact	Indirect evidence	Mukilteo, WA, United StatesHQ checked Sep 30, 2026	201-500	443 contacts →
	Indirect evidence “Electroimpact is a highly experienced provider of factory automation and tooling solutions.” Source: RevenueBase Database · checked Sep 30, 2026
10	Nooter Construction	Strong evidence	Fenton, MO, United StatesHQ checked Sep 30, 2026	1,001-5,000	410 contacts →
	Strong evidence “NOOTER is a fully integrated turnkey construction, multi-craft, construction engineering and maintenance contractor, with an unrivaled track record of success in the industrial…” Source: RevenueBase Database · checked Sep 30, 2026
11	Paslin	Partial evidence	Warren, MI, United StatesHQ checked Sep 30, 2026	501-1,000	359 contacts →
	Partial evidence “Since 1937, Paslin has been a leading innovator in the concept, design, construction and deployment of manufacturing assembly and automation systems.” Source: RevenueBase Database · checked Sep 30, 2026
12	G.A. West & Company	Indirect evidence	Creola, AL, United StatesHQ checked Sep 30, 2026	1,001-5,000	329 contacts →
	Indirect evidence “G.A.” Source: RevenueBase Database · checked Sep 30, 2026
13	Eldeco, INC	Indirect evidence	Piedmont, SC, United StatesHQ checked Sep 30, 2026	501-1,000	328 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
14	Casey Industrial, A Mastec Company	Partial evidence	Louisville, CO, United StatesHQ checked Sep 30, 2026	501-1,000	326 contacts →
	Partial evidence “Casey Industrial, a MasTec company, was built on the premise that all clients, vendors, and employees are treated with integrity and respect.” Source: RevenueBase Database · checked Sep 30, 2026
15	Koops Automation Systems	Indirect evidence	Holland, MI, United StatesHQ checked Sep 30, 2026	201-500	277 contacts →
	Indirect evidence “Specializing in factory automation systems, Koops designs and builds innovative special machines and automated equipment for leading, world-class manufacturers across a broad…” Source: RevenueBase Database · checked Sep 30, 2026
16	Starr Electric Company, INC	Indirect evidence	Greensboro, NC, United StatesHQ checked Sep 30, 2026	501-1,000	268 contacts →
	Indirect evidence “Established in 1928, Starr Electric Company, Inc.” Source: RevenueBase Database · checked Sep 30, 2026
17	Dilling Group INC	Partial evidence	Logansport, IN, United StatesHQ checked Sep 30, 2026	201-500	253 contacts →
	Partial evidence “Dilling Group Inc.(DGI) provides industrial and commercial solutions with exceptional value.” Source: RevenueBase Database · checked Sep 30, 2026
18	Randall	Indirect evidence	Apopka, FL, United StatesHQ checked Sep 30, 2026	201-500	252 contacts →
	Indirect evidence “RANDALL is a premier self-performing $100M+ subcontractor providing integrated Mechanical, Electrical, Plumbing, Fire Protection, Architectural Metals, and Offsite…” Source: RevenueBase Database · checked Sep 30, 2026
19	MKD Electric	Strong evidence	Elgin, IL, United StatesHQ checked Sep 30, 2026	201-500	245 contacts →
	Strong evidence “MKD Electric is one of the Midwest’s largest full-service merit shop industrial electrical contractors, specializing in instrumentation and control systems integration.” Source: RevenueBase Database · checked Sep 30, 2026
20	Major Tool & Machine	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 30, 2026	201-500	233 contacts →
	Indirect evidence “Established in 1946, Major Tool & Machine started business as a custom job shop specializing in the production of tooling and aircraft ground support equipment and has since…” Source: RevenueBase Database · checked Sep 30, 2026
21	NIC Global Manufacturing Solutions	Partial evidence	Woodinville, TN, United StatesHQ checked Sep 30, 2026	501-1,000	229 contacts →
	Partial evidence “NIC Global is a single-source manufacturer providing turn-key mechanical and electromechanical assembly, expert sheet metal fabrication, and global sourcing of metal and plastic…” Source: RevenueBase Database · checked Sep 30, 2026
22	Petrochem Insulation, INC	Strong evidence	Sellersburg, IN, United StatesHQ checked Sep 30, 2026	1,001-5,000	223 contacts →
	Strong evidence “A trusted industrial contractor since 1974, we at Petrochem provide multi-craft services to industrial and commercial clients nationwide.” Source: RevenueBase Database · checked Sep 30, 2026
23	Burkes Mechanical, INC	Indirect evidence	Brent, AL, United StatesHQ checked Sep 30, 2026	201-500	217 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
24	IPEC	Indirect evidence	Grayling, MI, United StatesHQ checked Sep 30, 2026	51-200	210 contacts →
	Indirect evidence “IPEC, L.L.C.” Source: RevenueBase Database · checked Sep 30, 2026
25	Multi-Dimensional Integration	Indirect evidence	Shrewsbury, PA, United StatesHQ checked Sep 30, 2026	201-500	204 contacts →
	Indirect evidence “MDI is a one stop shop for all of your automation needs.” Source: RevenueBase Database · checked Sep 30, 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: industrial assembly 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 industrial assembly contractors.
Partial evidence: Its own public description names part of industrial assembly contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial assembly 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 1,930 industrial assembly contractors based in the United States

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Industrial assembly contractors based in the United States at a glance

As of Sep 30, 2026

28.9%Verified-email coverage

24.9Average contacts per company

11-50Median size (employees)

1.1%Largest-city concentration · Houston

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

593

11-50

750

51-200

433

201-500

103

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 1,930 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 industrial assembly 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 “industrial assembly 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 industrial assembly 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 industrial assembly 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, 13,915 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 30, 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.

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 industrial assembly 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 industrial assembly contractors are there based in the United States?

RevenueBase identified 1,930 industrial assembly 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?

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

Which city has the most industrial assembly contractors?

Houston leads with 22 headquartered companies, followed by Indianapolis (12) and Louisville (12).

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 13,915 verified decision-maker contacts tracked across these 1,930 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 30, 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.