Company lists · Data refreshed October 2026

Top 25 Chemical process design firms based in the United States

RevenueBase identified 457 company matches for chemical process design firms associated with the United States as of October 2026 and tracks 11,338 professional contacts across them, including 4,093 with verified work emails. Houston is the largest hub.

This list covers company matches for chemical process design firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 9, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 9, 2026 How this list was built
457Companies
11,338Contacts tracked
4,093Verified emails
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The 25 largest chemical process design firms based in the United States

Ranked by team size
Top 25 of 457 company matches for chemical process design firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchTulsa, OK, United StatesHQ recorded Oct 9, 20261,001-5,000921 contacts →

Exact match

“Since 1979, Zeeco is the trusted worldwide source for the design and manufacturing of combustion and environmental solutions for the refining, petrochemical, production, power and…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2Exact matchSalt Lake City, UT, United StatesHQ recorded Oct 9, 2026501-1,000577 contacts →

Exact match

“WesTech Engineering, LLC designs, engineers, and manufactures water and wastewater treatment process equipment for mineral, industrial, and municipal applications worldwide.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Oct 9, 2026501-1,000551 contacts →

Exact match

“Ingenero's goal is to be the best process engineering firm by delivering the highest quality service and software solutions at the lowest cost.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4Exact matchChattanooga, TN, United StatesHQ recorded Oct 9, 20265,001-10,000488 contacts →

Exact match

“The Vincit Group is a vertically-integrated organization of member companies that provides a single-source solution for chemical services, contract management, and automation and…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5Exact matchLouisville, KY, United StatesHQ recorded Oct 9, 2026201-500325 contacts →

Exact match

“Chemical & Industrial Engineering, Inc.(C&I) is a full-service Engineering, Design & Procurement firm, providing hands-on design expertise for increasing capacity, improving…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6Exact matchChesterfield, MO, United StatesHQ recorded Oct 9, 2026201-500286 contacts →

Exact match

“MECS is the global leader in sulfuric acid process technology and related high performance products custom engineered for acid plant production environments.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7Exact matchMiamisburg, OH, United StatesHQ recorded Oct 9, 202651-200274 contacts →

Exact match

“ADF Engineering provides comprehensive Process and Facility engineering services to the food, feed, biofuels, bioscience, and consumer products industries.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8Exact matchMason, OH, United StatesHQ recorded Oct 9, 2026201-500247 contacts →

Exact match

“BSI Engineering is a full-service engineering consulting firm dedicated to delivering innovative, efficient, and effective solutions across various industries.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9Exact matchSt. Louis, MO, United StatesHQ recorded Oct 9, 2026201-500216 contacts →

Exact match

“Elessent Clean Technologies is a global leader in process technologies to drive sustainability and carbon neutrality in the metals, fertilizer, chemicals and oil refining…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10Exact matchBaton Rouge, LA, United StatesHQ recorded Oct 9, 202651-200155 contacts →

Exact match

“GRSA is a full service professional engineering company providing process and detailed engineering services for a broad range of upstream, midstream, and downstream petrochemical…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11Exact matchGolden, CO, United StatesHQ recorded Oct 9, 202651-200140 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12Exact matchHouston, TX, United StatesHQ recorded Oct 9, 2026201-500139 contacts →

Exact match

“We, Pyramid E&C provide Modular, Digital and Sustainable Hydrocarbon processing solutions from last 25 years and have executed more than 700 projects worldwide.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13Exact matchSt. Louis, MO, United StatesHQ recorded Oct 9, 202651-200124 contacts →

Exact match

“PENTA Engineering Corporation is an international, multidisciplinary firm providing comprehensive consulting and design/build solutions to the cement, lime, industrial minerals…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14Exact matchStratford, WI, United StatesHQ recorded Oct 9, 2026201-500116 contacts →

Exact match

“We are an industry leader in the design, engineering, development, fabrication, and installation of process systems for many industries that touch the lives of almost everyone on…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15Exact matchTulsa, OK, United StatesHQ recorded Oct 9, 202651-200107 contacts →

Exact match

“Select Engineering, Inc, is a privately-held company with offices in Tulsa,OK and Houston,TX.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16Exact matchParamus, NJ, United StatesHQ recorded Oct 9, 202651-20099 contacts →

Exact match

“Koch Modular Process Systems, LLC (Koch Modular) specializes in the design and supply of modular process systems for the worldwide Chemical Processing Industry.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17Exact matchSan Ramon, CA, United StatesHQ recorded Oct 9, 202651-20096 contacts →

Exact match

“ADVENT provides a wide array of services supporting the entire phase of the product lifecycle - from conceptual design through production.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18Exact matchHomer City, PA, United StatesHQ recorded Oct 9, 2026201-50095 contacts →

Exact match

“Established in 1997, Chemstream, Inc.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19Exact matchHouston, TX, United StatesHQ recorded Oct 9, 202651-20091 contacts →

Exact match

“ZymeFlow® is the global leader in chemical decontamination of process equipment in refinery, petrochemical, gas, and specialty markets.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20Exact matchFairfield, OH, United StatesHQ recorded Oct 9, 202651-20090 contacts →

Exact match

“Calvary Industries was founded in 1983 as a chemical compounding supplier and manufacturer.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21Exact matchBryan, TX, United StatesHQ recorded Oct 9, 202651-20088 contacts →

Exact match

“For over 50 years, Bryan Research & Engineering has provided the energy industry with process simulation software renowned for its ability to accurately and efficiently predict…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22Exact matchAkron, OH, United StatesHQ recorded Oct 9, 202651-20086 contacts →

Exact match

“Why Chemstress?”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23Exact matchPittsburgh, PA, United StatesHQ recorded Oct 9, 202611-5072 contacts →

Exact match

“PCC’s mission is to apply our know-how with confidence to design, supply and service high-tech, energy-efficient, dependable combustion and pollution control systems that provide…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24Exact matchMidlothian, VA, United StatesHQ recorded Oct 9, 202651-20071 contacts →

Exact match

“Progressive Design, Inc.(PDI) is a private, family-owned, Heavy Industrial Engineering & Design Consulting firm that provides valued engineering services.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25Exact matchGreen Bay, WI, United StatesHQ recorded Oct 9, 202651-20067 contacts →

Exact match

“FEECO International was founded in 1951 as the Fertilizer Engineering & Equipment Company.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

Showing 25 of 457 chemical process design firms based in the United States

See the full list, filter by size, metro and specialty, and access 4,093 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Chemical process design firms based in the United States at a glance

As of Oct 9, 2026
36.1%Verified-email coverage
24.8Average contacts per company
11-50Median size (employees)
9.2%Largest-city concentration · Houston
Oct 9, 2026Page data refreshed

Companies by employee count

1-10
204
11-50
161
51-200
62
201-500
18
501-1,000
6
1,001-5,000
2
5,001-10,000
1
10001+
2

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 457 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United States whose business descriptions match “chemical process design firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 4,093 professional contacts with verified work emails across the full matched dataset. 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 October 9, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Chemical process design firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “chemical process design firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many chemical process design firms are there based in the United States?

RevenueBase identified 457 company matches for chemical process design firms associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Zeeco, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most chemical process design firms?

Houston leads with 42 company records, followed by Atlanta (5) and Austin (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,093 professional contacts with verified work emails tracked across these 457 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 9, 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 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.