Company lists · Data refreshed September 2026
Top 25 Chemical engineering companies based in Houston, United States
This directory lists 70 chemical engineering companies based in Houston, United States, with contact coverage including 4,218 contacts and 598 email addresses. The list was updated in September 2026. Use it to identify potential engineering, design, consulting, and project delivery partners. Across the United States, Houston is the largest hub for this category.
Chemical engineering companies apply chemistry, physics, biology, and process engineering to design, improve, and manage systems that produce, transform, or handle chemicals, materials, fuels, food, pharmaceuticals, and related products. This list covers companies that provide chemical engineering design, consulting, process development, plant engineering, technical services, or related project support. Ranked by team size, largest first. Data current as of September 8, 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 chemical engineering companies based in Houston, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 532 contacts → | ||||
Partial 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 8, 2026Thanks. The Data Team will review it. | |||||
| 2 | 144 contacts → | ||||
Partial evidence “Sterling Specialty Chemicals pushes the boundaries in chemical solutions, redefining the way the world extracts energy.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 3 | 129 contacts → | ||||
Indirect evidence “We, Pyramid E&C provide Modular, Digital and Sustainable Hydrocarbon processing solutions from last 25 years and have executed more than 700 projects worldwide.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 4 | 102 contacts → | ||||
Indirect evidence “We are a respected and innovative solutions provider focusing on process safety, reliability and control.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 5 | 65 contacts → | ||||
Partial evidence “BD Energy Systems LLC located in Houston, TX, USA is a world leading engineering company operating in the Petrochemical, Fertilizer, Refining, and Gas Processing industry…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 6 | 41 contacts → | ||||
Partial evidence “Riteks is a leading industrial chemical supplier for specialty applications used in oilfields, construction, protective coatings, and custom chemical manufacturing.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 7 | 36 contacts → | ||||
Strong evidence “Athlon, a Halliburton Service, provides specialty water and process treatment chemicals, customized engineering solutions, and services to the industrial sector, including the…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 8 | 21 contacts → | ||||
Partial evidence “Our expertise spans the full range of Process Engineering, Industrial Automation, Turn-Key Engineering Construction Projects, Fabrication, Turnaround and Field Services.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 9 | 21 contacts → | ||||
Partial evidence “Calcgen Solutions believes in quality engineering service delivery to our clients.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 10 | 21 contacts → | ||||
Indirect 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 8, 2026Thanks. The Data Team will review it. | |||||
| 11 | 20 contacts → | ||||
Partial evidence “Ascent Engineering, Inc.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 12 | 20 contacts → | ||||
Partial evidence “GTC Vorro Technology is a turn-key environmental services and technology provider to oilfield, refining, petrochemical and chemical companies around the world.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 13 | 15 contacts → | ||||
Partial evidence “SSP Engineering & Consulting is a consulting firm based in the Houston Metropolitan area.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 14 | 14 contacts → | ||||
Partial evidence “Datacor, formerly Chemstations, provides chemical process simulation software that enables chemical engineers to model and optimize processes, improve safety, and increase…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 15 | 10 contacts → | ||||
Indirect evidence “We came into the oil and gas industry with one mission: to combine our knowledge and put everything we have into the development of novel chemistries that add value to our clients.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 16 | 9 contacts → | ||||
Partial evidence “EPCON’s mission is Ingenuity Simplified - we develop process engineering software that enables plant based engineers to make a significant difference in their company and in their…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 17 | 7 contacts → | ||||
Strong evidence “At Siege Engineering, we excel in advancing chemical manufacturing technologies, allowing us to ensure safety, lower costs, and faster, reliable outcomes.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 18 | 7 contacts → | ||||
Strong evidence “Athena Energy offers experienced engineering, high quality performance chemicals and specialty products for Oil and Gas and Sustainable Energy Services.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 19 | 6 contacts → | ||||
Partial evidence “Catmasters LLC was formed in 2019 by a team of engineers from leading engineering roles within top tier global technology providers to oil refineries, gas, petrochemical and…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Indirect evidence “Maxoil’s core abilities are in improving production efficiency and providing overall operations assurance strategies that achieve increased productivity with reliability.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 contacts → | ||||
Partial evidence “DuoKem is a USA chemical company.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 contacts → | ||||
Partial evidence “Melland Consulting offers a range of services from operation evaluations for midstream and production companies to project management or design work for engineering companies and…” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 23 | 3 contacts → | ||||
Partial evidence “Process Consulting Services provides grassroots and revamp front-end process engineering to the refinery industry worldwide.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 contacts → | ||||
Partial evidence “Not all engineers and engineering companies deliver the same level of engineering expertise.” Source: RevenueBase Database · checked Sep 8, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 contacts → | ||||
Indirect evidence “About Us We focus on delivering cost efficient, quality design packages, without the excessive overhead and high cost associated with larger firms, without compromising safety and…” Source: RevenueBase Database · checked Sep 8, 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: chemical engineering 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 chemical engineering companies.
- Partial evidence
- Its own public description names part of chemical engineering companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name chemical engineering 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 70 chemical engineering companies based in Houston, United States
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Chemical engineering companies based in Houston, United States at a glance
As of Sep 8, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 chemical engineering 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 Houston, United States whose own description of what they do matches “chemical engineering 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 chemical engineering 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 chemical engineering companies, 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, 598 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 8, 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
How many chemical engineering companies are in the directory?
The directory contains 70 chemical engineering companies based in Houston, United States.
What services do chemical engineering companies provide?
Chemical engineering companies provide services such as process design, plant engineering, feasibility studies, process development, safety analysis, commissioning, and technical consulting.
Which city in the United States has the most chemical engineering companies?
Houston leads the United States with 54 headquartered companies, followed by Louisville (6) and Atlanta (5).
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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.
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