Company lists · Data refreshed September 2026

Top 25 Refinery control system installers based in the United States

Name: Refinery control system installers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 548 companies tracked

RevenueBase identified 548 refinery control system installers headquartered in the United States as of September 2026 and tracks 17,627 professional contacts across them, including 7,806 with verified work emails. Houston is the largest hub.

This list covers refinery control system installers 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 21, 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 21, 2026 86% judged on-target in blind review

548Companies

17,627Contacts tracked

7,806Verified emails

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The 25 largest refinery control system installers based in the United States

Ranked by team size

Top 25 of 548 refinery control system installers based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to refinery control system installers: 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	Englobal	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	1,183 contacts →
	Indirect evidence “Who We Are Englobal Founded in 1985, ENGlobal (NASDAQ: ENG) is a specialty engineering services firm that focuses on automation solutions and select EPCM projects for the energy…” Source: RevenueBase Database · checked Sep 21, 2026
2	Rovisys	Partial evidence	Aurora, OH, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,159 contacts →
	Partial evidence “As one of the world's largest independent systems integrators, RoviSys delivers comprehensive automation, digital transformation, manufacturing execution (MES), Industrial AI…” Source: RevenueBase Database · checked Sep 21, 2026
3	Intech Automation & Intelligence	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	501-1,000	879 contacts →
	Indirect evidence “INTECH Automation & Intelligence is a globally renowned industrial automation & digitalization technology company.” Source: RevenueBase Database · checked Sep 21, 2026
4	Puffer-Sweiven	Indirect evidence	Stafford, TX, United StatesHQ checked Sep 21, 2026	501-1,000	688 contacts →
	Indirect evidence “Puffer‑Sweiven has supported process operations for over 80 years-helping facilities run safer, smarter, and more reliably.” Source: RevenueBase Database · checked Sep 21, 2026
5	Setpoint Integrated Solutions, INC	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 21, 2026	501-1,000	626 contacts →
	Partial evidence “Setpoint Integrated Solutions, a Vytl Company is a leading integrated solutions and services provider in the process control industry.” Source: RevenueBase Database · checked Sep 21, 2026
6	Wunderlich-Malec Engineering, INC	Strong evidence	Eden Prairie, MN, United StatesHQ checked Sep 21, 2026	501-1,000	623 contacts →
	Strong evidence “Wunderlich-Malec Engineering is a nationally recognized, 100% employee-owned leader in advanced engineering and control system solutions.” Source: RevenueBase Database · checked Sep 21, 2026
7	W-Industries	Strong evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	501-1,000	552 contacts →
	Strong evidence “Our expertise encompasses the full spectrum of system technologies from pneumatic - hydraulic control systems to state of the art programmable solutions to chemical injection…” Source: RevenueBase Database · checked Sep 21, 2026
8	Ingenero	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	501-1,000	532 contacts →
	Indirect evidence “Ingenero's goal is to be the best process engineering firm by delivering the highest quality service and software solutions at the lowest cost.” Source: RevenueBase Database · checked Sep 21, 2026
9	Kimray, INC	Indirect evidence	Oklahoma City, OK, United StatesHQ checked Sep 21, 2026	501-1,000	514 contacts →
	Indirect evidence “Kimray is a global solutions partner in the energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
10	Contech Control Services	Partial evidence	La Porte, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	512 contacts →
	Partial 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 21, 2026
11	Ardent Services, LLC	Partial evidence	Covington, LA, United StatesHQ checked Sep 21, 2026	51-200	467 contacts →
	Partial 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 21, 2026
12	The Stronghold Companies	Partial evidence	La Porte, TX, United StatesHQ checked Sep 21, 2026	5,001-10,000	419 contacts →
	Partial evidence “As part of the Quanta Services Family of Companies (NYSE: PWR)- Stronghold provides the safest, leanest, most efficient, quality solutions for the refinery, petrochemical and…” Source: RevenueBase Database · checked Sep 21, 2026
13	Mangan INC	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 21, 2026	201-500	395 contacts →
	Indirect 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 21, 2026
14	Experitec INC	Indirect evidence	Chesterfield, MO, United StatesHQ checked Sep 21, 2026	201-500	239 contacts →
	Indirect evidence “Experitec has served the industry for over 100 years, partnering with its customers to gain competitive advantages and unlock the hidden potential in their facilities.” Source: RevenueBase Database · checked Sep 21, 2026
15	Proconex	Strong evidence	Royersford, PA, United StatesHQ checked Sep 21, 2026	201-500	238 contacts →
	Strong evidence “For over 75 years, Proconex has been a leading provider of Process Automation Control Systems, Valves and Control Devices, and related technologies and services.” Source: RevenueBase Database · checked Sep 21, 2026
16	Vinson Process Controls	Partial evidence	Lewisville, TX, United StatesHQ checked Sep 21, 2026	201-500	217 contacts →
	Partial 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 21, 2026
17	Applied Control	Partial evidence	Centennial, CO, United StatesHQ checked Sep 21, 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 21, 2026
18	Vertech	Strong evidence	Phoenix, AZ, United StatesHQ checked Sep 21, 2026	201-500	175 contacts →
	Strong evidence “Vertech is an industrial control systems integration firm providing a complete range of engineering and technical services.” Source: RevenueBase Database · checked Sep 21, 2026
19	Control Associates, INC	Strong evidence	Allendale, NJ, United StatesHQ checked Sep 21, 2026	51-200	161 contacts →
	Strong evidence “Control Associates is a provider of control systems, valves, instrumentation, pressure management, asset reliability, MES, PAT, systems integration and data management solutions…” Source: RevenueBase Database · checked Sep 21, 2026
20	Rexa, INC	Partial evidence	West Bridgewater, MA, United StatesHQ checked Sep 21, 2026	51-200	144 contacts →
	Partial evidence “At REXA, we provide customer-specific engineered process control solutions.” Source: RevenueBase Database · checked Sep 21, 2026
21	GE Vernova's GAS Power Control Solutions & Services	Indirect evidence	Longmont, CO, United StatesHQ checked Sep 21, 2026	1,001-5,000	143 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
22	Versatech Automation Services, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	142 contacts →
	Indirect evidence “VersaTech Automation Services is a 50 year old company with 500+ people and $90M+ in annual sales.” Source: RevenueBase Database · checked Sep 21, 2026
23	Clark-Reliance	Partial evidence	Strongsville, OH, United StatesHQ checked Sep 21, 2026	201-500	136 contacts →
	Partial evidence “Clark-Reliance® continues to be the global leader in the level indication and control, sightflow indication, and filtration and separation industries.” Source: RevenueBase Database · checked Sep 21, 2026
24	PACIV	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 21, 2026	51-200	135 contacts →
	Indirect evidence “PACIV partners with life sciences, utilities, and manufacturing organizations to design, build, and automate efficient operations.” Source: RevenueBase Database · checked Sep 21, 2026
25	VAREC	Indirect evidence	Peachtree Corners (atlanta), GA, United StatesHQ checked Sep 21, 2026	51-200	128 contacts →
	Indirect evidence “Varec has been a leading innovator in the petroleum and chemical sectors for over eight decades – working with industry leaders to pioneer inventory tank gauging instrumentation…” Source: RevenueBase Database · checked Sep 21, 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: refinery control system installers. 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 refinery control system installers.
Partial evidence: Its own public description names part of refinery control system installers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name refinery control system installers. 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 548 refinery control system installers based in the United States

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Refinery control system installers based in the United States at a glance

As of Sep 21, 2026

44.3%Verified-email coverage

32.2Average contacts per company

11-50Median size (employees)

10.2%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

198

11-50

232

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 548 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 refinery control system installers, 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 “refinery control system installers”. 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 refinery control system installers), 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 refinery control system installers, 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, 7,806 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 21, 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.

Refinery control system installers by metro

Refinery control system installers in Houston56

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 refinery control system installers, 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 refinery control system installers are there based in the United States?

RevenueBase identified 548 refinery control system installers 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?

Englobal, headquartered in Houston, tops this list with the largest team on record.

Which city has the most refinery control system installers?

Houston leads with 56 headquartered companies, followed by Corpus Christi (6) and Odessa (6).

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 7,806 verified decision-maker contacts tracked across these 548 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 21, 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.