Company lists · Data refreshed September 2026

Top 25 Power plant automation companies based in the United States

Name: Power plant automation 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 17, 2026 527 companies tracked

RevenueBase identified 527 power plant automation companies headquartered in the United States as of September 2026 and tracks 15,309 professional contacts across them, including 5,444 with verified work emails. Houston is the largest hub.

This list covers power plant automation 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 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

527Companies

15,309Contacts tracked

5,444Verified emails

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The 25 largest power plant automation companies based in the United States

Ranked by team size

Top 25 of 527 power plant automation companies 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 automation 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	Fieldcore	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 17, 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 17, 2026
2	TMEIC	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	923 contacts →
	Partial evidence “TMEIC Corporation, headquartered in Houston, Texas, designs, develops and engineers advanced automation systems, large AC and DC motors, photovoltaic inverters and variable…” Source: RevenueBase Database · checked Sep 17, 2026
3	Rovisys Building Technologies	Strong evidence	Aurora, OH, United StatesHQ checked Sep 17, 2026	1,001-5,000	547 contacts →
	Strong evidence “As part of the RoviSys family of companies, we deliver vendor independent building automation, electrical power management, facility monitoring, and systems integration solutions…” Source: RevenueBase Database · checked Sep 17, 2026
4	Contech Control Services	Indirect evidence	La Porte, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	512 contacts →
	Indirect evidence “When we formed Contech in 1980, our goal was to create a specialized engineering and construction company to provide a full range of system independent services for process…” Source: RevenueBase Database · checked Sep 17, 2026
5	Ardent Services, LLC	Strong evidence	Covington, LA, United StatesHQ checked Sep 17, 2026	51-200	467 contacts →
	Strong evidence “Ardent Services, LLC (Ardent) is a leading provider of high-quality power, control, process-automation, and electrical and instrumentation (E&I) services for process industries…” Source: RevenueBase Database · checked Sep 17, 2026
6	Mangan INC	Partial evidence	Long Beach, CA, United StatesHQ checked Sep 17, 2026	201-500	395 contacts →
	Partial evidence “Mangan Inc, an Automation & Engineering Firm, provides the highest quality services for the Refining, Gas & Oil, Pipeline, Renewable, Chemical, and Biopharm Industries.” Source: RevenueBase Database · checked Sep 17, 2026
7	Ermco, INC	Indirect evidence	Greenwood, IN, United StatesHQ checked Sep 17, 2026	201-500	304 contacts →
	Indirect evidence “From our beginning in 1962 as a small electrical maintenance company in downtown Indianapolis with a staff of three, ERMCO, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
8	Systems Control	Indirect evidence	Iron Mountain, MI, United StatesHQ checked Sep 17, 2026	501-1,000	240 contacts →
	Indirect evidence “Systems Control, a Hubbell brand, designs and manufactures turnkey control systems and control relays that are involved in the protection and control of transmission and…” Source: RevenueBase Database · checked Sep 17, 2026
9	Vinson Process Controls	Strong evidence	Lewisville, TX, United StatesHQ checked Sep 17, 2026	201-500	217 contacts →
	Strong evidence “Vinson Process Controls is the leading provider for industrial automation solutions for Oil and Gas, Chemical and Petro-Chemical, Pulp and Paper, Power Generation, Refining and…” Source: RevenueBase Database · checked Sep 17, 2026
10	Expanse Electrical CO	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	188 contacts →
	Partial evidence “Expanse Electrical Company is a premier provider of integrated electrical infrastructure, instrumentation and automation system solutions.” Source: RevenueBase Database · checked Sep 17, 2026
11	Applied Control	Partial evidence	Centennial, CO, United StatesHQ checked Sep 17, 2026	201-500	180 contacts →
	Partial evidence “Applied Control comes alongside you as a partner who understands your plant, your processes, and the pressure you face to deliver performance without interruption.” Source: RevenueBase Database · checked Sep 17, 2026
12	Novatech Automation	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 17, 2026	51-200	153 contacts →
	Partial evidence “NovaTech Automation produces the easiest to use and best supported automation products and solutions for electric utilities.” Source: RevenueBase Database · checked Sep 17, 2026
13	Trimark Associates, INC	Indirect evidence	Folsom, CA, United StatesHQ checked Sep 17, 2026	51-200	147 contacts →
	Indirect evidence “Follow us to discover company developments, our energy clients' successes and employment opportunities.” Source: RevenueBase Database · checked Sep 17, 2026
14	Excel Engineering	Partial evidence	St. Paul, MN, United StatesHQ checked Sep 17, 2026	51-200	147 contacts →
	Partial evidence “We provide a full scope of electrical and automation engineering and consulting services under one roof, driven by industry-best knowledge and fluid collaboration.” Source: RevenueBase Database · checked Sep 17, 2026
15	GE Vernova's GAS Power Control Solutions & Services	Indirect evidence	Longmont, CO, United StatesHQ checked Sep 17, 2026	1,001-5,000	143 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
16	Versatech Automation Services, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	142 contacts →
	Partial evidence “VersaTech Automation Services is a 50 year old company with 500+ people and $90M+ in annual sales.” Source: RevenueBase Database · checked Sep 17, 2026
17	Profire Energy	Indirect evidence	Lindon, UT, United StatesHQ checked Sep 17, 2026	51-200	127 contacts →
	Indirect evidence “Profire is an expert in burner management systems and combustion controls, offering performance-driven solutions for industry leaders.” Source: RevenueBase Database · checked Sep 17, 2026
18	Indicon LLC	Indirect evidence	Sterling Heights, MI, United StatesHQ checked Sep 17, 2026	51-200	125 contacts →
	Indirect evidence “Indicon is the leading Control System Integrator and one of the largest, most technologically advanced, UL Certified Panel Builders in the Industry.” Source: RevenueBase Database · checked Sep 17, 2026
19	Premier Automation LLC	Partial evidence	Monroeville, PA, United StatesHQ checked Sep 17, 2026	51-200	113 contacts →
	Partial evidence “Premier Automation is an industry leading engineered solutions company focused on providing best-in-class automation, drive, robotics, electrical control solutions, panel building…” Source: RevenueBase Database · checked Sep 17, 2026
20	LIN & Associates, INC	Partial evidence	Phoenix, TX, United StatesHQ checked Sep 17, 2026	11-50	113 contacts →
	Partial evidence “Lin & Associates is a control system integration company with years of practical industrial experience implementing automation solutions.” Source: RevenueBase Database · checked Sep 17, 2026
21	Emerson Ovation Automation Platform	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 17, 2026	10001+	107 contacts →
	Partial evidence “Explore the ways the Ovation™ Automation Platform and Ovation Green renewable solutions remove data silos to provide a holistic operational view that helps utilities meet the…” Source: RevenueBase Database · checked Sep 17, 2026
22	Boiler Supply Company	Strong evidence	Nashville, TN, United StatesHQ checked Sep 17, 2026	51-200	107 contacts →
	Strong evidence “As the most professional and complete power plant company in our markets, we only work with the very best and that’s exactly what we deliver.” Source: RevenueBase Database · checked Sep 17, 2026
23	Forney Corporation	Strong evidence	Addison, TX, United StatesHQ checked Sep 17, 2026	51-200	106 contacts →
	Strong evidence “Forney® has maintained its position as a leader in power plant and large industrial systems for more than 90 years by designing, manufacturing, installing and servicing the most…” Source: RevenueBase Database · checked Sep 17, 2026
24	Preferred Utilities Manufacturing Corporation	Partial evidence	Danbury, CT, United StatesHQ checked Sep 17, 2026	51-200	104 contacts →
	Partial evidence “Preferred Utilities Manufacturing Corporation is an engineering-based manufacturer of products for commercial, institutional, industrial and nuclear power facilities.” Source: RevenueBase Database · checked Sep 17, 2026
25	Basler	Indirect evidence	Highland, IL, United StatesHQ checked Sep 17, 2026	501-1,000	104 contacts →
	Indirect evidence “In 2025, Basler Electric Company was acquired by Littelfuse, Inc, a global, diversified industrial technology manufacturing company dedicated to creating a sustainable, connected…” 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 automation 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 power plant automation companies.
Partial evidence: Its own public description names part of power plant automation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name power plant automation 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 527 power plant automation companies based in the United States

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Power plant automation companies based in the United States at a glance

As of Sep 17, 2026

35.6%Verified-email coverage

29.0Average contacts per company

11-50Median size (employees)

5.9%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

226

11-50

202

51-200

201-500

501-1,000

1,001-5,000

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 527 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 automation 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 “power plant automation 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 power plant automation 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 power plant automation 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, 5,444 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 automation companies by metro

Power plant automation companies in Houston31

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 automation 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 power plant automation companies are there based in the United States?

RevenueBase identified 527 power plant automation 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?

Fieldcore, headquartered in Atlanta, tops this list with the largest team on record.

Which city has the most power plant automation companies?

Houston leads with 31 headquartered companies, followed by Charlotte (5) and Marietta (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 5,444 verified decision-maker contacts tracked across these 527 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.