Company lists · Data refreshed September 2026
Top 25 Refinery control systems integrators based in Houston, United States
RevenueBase identified 55 refinery control systems integrators headquartered in Houston, United States as of September 2026 and tracks 3,176 professional contacts across them, including 825 with verified work emails and 797 with mobile numbers. Houston is the largest hub.
This list covers refinery control systems integrators headquartered in Houston, 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 13, 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.
The 25 largest refinery control systems integrators based in Houston, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 13, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 13, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 13, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 13, 2026Thanks. The Data Team will review it. | |||||
| 5 | 106 contacts → | ||||
Strong evidence “Integration objects is a world-leading systems integrator and solutions provider specialized in operations and manufacturing intelligence, advanced analytics, preventive detection…” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 6 | 87 contacts → | ||||
Partial evidence “We have earned a reputation as a global leader in Design/Build & Systems Integration for more than 30 years.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 7 | 40 contacts → | ||||
Strong evidence “Parijat Controlware Inc.(Parijat or PCI) is a controls systems integrator since 1989, has been a strong player in the controls, automation industry.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 8 | 31 contacts → | ||||
Partial evidence “EnerSys Corporation is an oil & gas software and services company focused on delivering operational excellence for oil & gas pipeline control rooms.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 9 | 21 contacts → | ||||
Strong evidence “TAG is a recognized leader in providing system independent, specialized technical and management services for the implementation of process control system projects in the…” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 10 | 14 contacts → | ||||
Partial evidence “At SISO, we take a collaborative, hands-on approach to solving complex turbine control and automation challenges.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 11 | 14 contacts → | ||||
Strong evidence “Lime Instruments is an independent Houston-based global provider of leading-edge controls and instrumentation systems for the energy and industrial control markets.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 12 | 14 contacts → | ||||
Strong evidence “NuGen Automation is a progressive technology-driven company that excels in the development and implementation of SCADA Automation, Distributed Control Systems, and Information…” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 13 | 10 contacts → | ||||
Strong evidence “About SSAC Solid State Automation and Controls LLC (SSAC) is an electrical engineering company that provides comprehensive solutions for your automation and control system needs.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 contacts → | ||||
Indirect evidence “Elinca Electronic Corporation was founded in 2009 in the city of Katy Texas, with the aim of developing commercial activities for the local and national market, in the field of…” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 contacts → | ||||
Strong evidence “Specializing in various Control System Platforms, including Process Control Systems, Safety Control Systems, Programmable Logic Controllers, and RTU’s.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 16 | 4 contacts → | ||||
Partial evidence “We are a group of Electrical Engineers and Subject Matter Experts focusing on electrical engineering, instrumentation & automation engineering, Supervisory Control and Data…” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4 contacts → | ||||
Partial evidence “We connect equipment, systems and processes – old with new, modern with legacy.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 19 | 3 contacts → | ||||
Strong evidence “Industrial Control Systems Engineering started is an Automation & Controls company.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3 contacts → | ||||
Indirect evidence “PCT is a young dynamic company with over a century of experience behind it.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Indirect evidence “MESAR AMERICA, founded in 2022 and headquartered in Newark, Delaware, is the North and Latin American arm of MESAR GROUP INC.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Partial evidence “Complete Engineering and Integration Services including PLC and DCS programming, high performance HMI design and configuration, control panel design and assembly, turn-key project…” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Indirect evidence “Microwave Precision Instruments (MPI) is a leading automation and instrumentation solutions provider.” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Strong evidence “Specialized in Automatic Sampling Systems for Crude Oil Custody Transfer, System Integration (AH, ALC, SCS, SRS), Heating, Ventilation & Air Conditioning units and Process Control…” Source: RevenueBase Database · checked Sep 13, 2026Thanks. The Data Team will review it. | |||||
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 systems integrators. 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 systems integrators.
- Partial evidence
- Its own public description names part of refinery control systems integrators, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name refinery control systems integrators. 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 55 refinery control systems integrators based in Houston, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 825 reachable decision-makers.
Free signup · no credit card
Refinery control systems integrators based in Houston, United States at a glance
As of Sep 13, 2026Companies by employee count
Freshness & accuracy
How recently the business emails were verified and the company information checked
Email last verified
Median 15.0dCompany record updated
Median 77.0dHow 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 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 Houston, 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.
- 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 systems integrators), 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 systems integrators, and records with no verified work email. Companies headquartered outside Houston 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, 825 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 13, 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 in the United States
- Refinery control systems integrators in Houston55
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 systems integrators, 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 systems integrators are there based in Houston, United States?
RevenueBase identified 55 refinery control systems integrators headquartered in Houston, 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 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 825 verified decision-maker contacts tracked across these 55 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 13, 2026.
Ready to reach these companies? Verified emails and direct dials for all 55 refinery control systems integrators based in Houston, United States. Start with a free account, no credit card.
Download this list →Related lists
Refinery control systems integrators by geography
- Refinery control systems integrators based in the United States
- Refinery control systems integrators based in the United Kingdom
- Refinery control systems integrators based in Canada
- Refinery control systems integrators based in Italy
- Refinery control systems integrators based in Brazil
- Refinery control systems integrators based in Mexico
- Refinery control systems integrators based in Spain
- Refinery control systems integrators based in Australia
- Refinery control systems integrators based in Germany
- Refinery control systems integrators based in the Netherlands
- Refinery control systems integrators based in South Africa
- Refinery control systems integrators based in Poland
Browse the directory
Browse: Companies home · Refinery control systems integrators in United States · All United States lists · All Refinery control systems integrators lists · New lists
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Refinery control systems integrators based in the United States
- Refinery control systems integrators based in the United Kingdom
- Refinery control systems integrators based in Canada
- Refinery control systems integrators based in Italy
- Refinery control systems integrators based in Brazil
- Refinery control systems integrators based in Mexico