Company lists · Data refreshed September 2026
Top 25 Refinery control systems integrators based in the United States
RevenueBase identified 1,113 refinery control systems integrators headquartered in the United States as of September 2026 and tracks 31,273 professional contacts across them, including 14,392 with verified work emails and 13,330 with mobile numbers. Houston is the largest hub.
This list covers refinery control systems integrators 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.
The 25 largest refinery control systems integrators based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,966 | ||||
“ENTRUST Solutions Group, an ENR Top 100 company, provides comprehensive and dependable engineering, consulting, and automation services to pipeline companies, gas and electric…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,183 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | RovisysStrong evidence | 1,159 | |||
“As one of the world's largest independent systems integrators, RoviSys delivers comprehensive automation, digital transformation, manufacturing execution (MES), Industrial AI…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 857 | ||||
“Prime Controls was established as a Main Automation Contractor to provide customers a sole source solution for Industrial Automation services and products.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | Puffer-SweivenIndirect evidence | 688 | |||
“Puffer‑Sweiven has supported process operations for over 80 years-helping facilities run safer, smarter, and more reliably.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 626 | ||||
“Setpoint Integrated Solutions, a Vytl Company is a leading integrated solutions and services provider in the process control industry.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | Wunderlich-Malec Engineering, INCStrong evidence | 623 | |||
“Wunderlich-Malec Engineering is a nationally recognized, 100% employee-owned leader in advanced engineering and control system solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 610 | ||||
“E Tech Group is one of the largest engineering and system integration firms in the United States.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | W-IndustriesStrong evidence | 552 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 532 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 512 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 467 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 455 | ||||
“Thermo Systems is a full-service control systems integration partner, providing world-class automation solutions within the Energy, Life Sciences, and Mission Critical markets.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | The Stronghold CompaniesPartial evidence | 419 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 395 | ||||
“Mangan Inc, an Automation & Engineering Firm, provides the highest quality services for the Refining, Gas & Oil, Pipeline, Renewable, Chemical, and Biopharm Industries.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 382 | ||||
“Matrix Technologies Inc.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 313 | ||||
“Tesco Controls, a UFT Company, is a full service systems integrator and original equipment manufacturer specializing in the WATER/WASTEWATER, TRANSPORTATION and ELECTRIC UTILITY…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 262 | ||||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 245 | ||||
“MKD Electric is one of the Midwest’s largest full-service merit shop industrial electrical contractors, specializing in instrumentation and control systems integration.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 239 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | LSIStrong evidence | 225 | |||
“LOGICAL SYSTEMS (LSI) is an outcome-driven systems integrator specializing in process improvement, electrical engineering, automation, systems integration, and manufacturing…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 225 | ||||
“Since 1991, Applied Control Engineering (ACE) has prioritized close collaboration with our customers to design, implement, and support advanced control, automation, and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 221 | ||||
“Avanceon, under VINCI Energies brand Actemium, is a systems integrator company that develops, executes, and supports automation/information solutions for manufacturing and utility…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 220 | ||||
“Grantek is a system integrator and solution provider with a specialization in Manufacturing IT solutions, Manufacturing Automation solutions, Industrial Safety solutions and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 204 | ||||
“MDI is a one stop shop for all of your automation needs.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 1,113 refinery control systems integrators based in the United States
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Refinery control systems integrators based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 systems integrators, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 systems integrators”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among refinery control systems integrators, 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 an evidence 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, 14,392 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 5, 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 systems integrators by metro
- Refinery control systems integrators in Houston55
Frequently asked
How many refinery control systems integrators are there based in the United States?
RevenueBase identified 1,113 refinery control systems integrators 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?
Entrust Solutions Group, headquartered in Lisle, tops this list with the largest team on record.
Which city has the most refinery control systems integrators?
Houston leads with 55 headquartered companies, followed by Baton Rouge (10) and Corpus Christi (7).
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 14,392 verified decision-maker contacts tracked across these 1,113 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 5, 2026.
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Refinery control systems integrators by geography
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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.
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