Company lists · Data refreshed September 2026

Top 25 Chemical plant consulting firms based in the United States

RevenueBase identified 1,212 company matches for chemical plant consulting firms associated with the United States as of September 2026 and tracks 26,414 professional contacts across them, including 8,592 with verified work emails. Houston is the largest hub.

This list covers company matches for chemical plant consulting 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 September 27, 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 Sep 27, 2026 How this list was built
1,212Companies
26,414Contacts tracked
8,592Verified emails
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The 25 largest chemical plant consulting firms based in the United States

Ranked by team size
Top 25 of 1,212 company matches for chemical plant consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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 Sep 27, 20261,001-5,000883 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 · Sep 27, 2026 · View company records in RevenueBase
2Exact matchLongview, TX, United StatesHQ recorded Sep 27, 2026501-1,000578 contacts →

Exact match

“Since 1991, Applied Consultants Inc.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Sep 27, 2026501-1,000532 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 · Sep 27, 2026 · View company records in RevenueBase
4Exact matchBeaumont, TX, United StatesHQ recorded Sep 27, 20261,001-5,000501 contacts →

Exact match

“RICHARD is a full-service engineering, procurement and construction firm in the petrochemical and refining industry.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchChattanooga, TN, United StatesHQ recorded Sep 27, 20265,001-10,000476 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 · Sep 27, 2026 · View company records in RevenueBase
6Exact matchBaytown, TX, United StatesHQ recorded Sep 27, 20261,001-5,000475 contacts →

Exact match

“Turn2 Specialty Companies is the premier provider of specialty turnaround services in the refining, petrochemical, and power industries.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchGardendale, TX, United StatesHQ recorded Sep 27, 20261,001-5,000456 contacts →

Exact match

“Jacam Catalyst offers a full range of oilfield chemical manufacturing, blending, formulating, analysis, and R&D capabilities.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchSulphur, LA, United StatesHQ recorded Sep 27, 2026501-1,000420 contacts →

Exact match

“ReCon was established in 1995 and has matured as a high quality and competitive engineering consulting firm providing engineering design and project management services to the…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchLa Porte, TX, United StatesHQ recorded Sep 27, 20265,001-10,000419 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchLong Beach, CA, United StatesHQ recorded Sep 27, 2026201-500395 contacts →

Exact match

“Mangan Inc, an Automation & Engineering Firm, provides the highest quality services for the Refining, Gas & Oil, Pipeline, Renewable, Chemical, and Biopharm Industries.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchLouisville, KY, United StatesHQ recorded Sep 27, 2026201-500313 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 · Sep 27, 2026 · View company records in RevenueBase
12Exact matchWinterville, NC, United StatesHQ recorded Sep 27, 2026501-1,000305 contacts →

Exact match

“Founded in 1977 as The Roberts Company, Roberts has grown from a small contractor to a large full service constructor and fabricator.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchMiamisburg, NE, United StatesHQ recorded Sep 27, 202651-200286 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 · Sep 27, 2026 · View company records in RevenueBase
14Exact matchLa Porte, TX, United StatesHQ recorded Sep 27, 2026201-500275 contacts →

Exact match

“AltairStrickland is a specialty mechanical contracting company serving the refining, petrochemical, power and fertilizer industries.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchChesterfield, MO, United StatesHQ recorded Sep 27, 2026201-500273 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 · Sep 27, 2026 · View company records in RevenueBase
16Exact matchLouisville, CO, United StatesHQ recorded Sep 27, 2026201-500253 contacts →

Exact match

“Hyde E+C is an international engineering consulting firm that helps companies operate more efficiently, get products to market more quickly, meet regulatory requirements more…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchMason, OH, United StatesHQ recorded Sep 27, 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 · Sep 27, 2026 · View company records in RevenueBase
18Exact matchWilmington, NC, United StatesHQ recorded Sep 27, 2026201-500230 contacts →

Exact match

“Chemtex is a global engineering and technology company.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchMidland, TX, United StatesHQ recorded Sep 27, 2026501-1,000225 contacts →

Exact match

“We are PROCTEK Group, delivering technical and advisory solutions tailored to each client, with a strong commitment to health and safety, social responsibility, and environmental…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20Exact matchDes Moines, IA, United StatesHQ recorded Sep 27, 2026201-500218 contacts →

Exact match

“With over five decades of proven experience, Seneca Companies prides itself in being a full-service provider of petroleum storage and dispensing systems, environmental consulting…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchBrent, AL, United StatesHQ recorded Sep 27, 2026201-500217 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchNew Orleans, LA, United StatesHQ recorded Sep 27, 2026201-500211 contacts →

Exact match

“For over a half century our professional staff - in meeting technical, schedule, budget, and regulatory requirements - has successfully completed projects in the U.S.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchPowell, OH, United StatesHQ recorded Sep 27, 202651-200195 contacts →

Exact match

“We don’t just make chemicals.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24Exact matchSt. Louis, MO, United StatesHQ recorded Sep 27, 2026201-500189 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 · Sep 27, 2026 · View company records in RevenueBase
25Exact matchClarkston, MI, United StatesHQ recorded Sep 27, 20261,001-5,000187 contacts →

Exact match

“For 80 years, Oscar W.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 25 of 1,212 chemical plant consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 8,592 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Chemical plant consulting firms based in the United States at a glance

As of Sep 27, 2026
32.5%Verified-email coverage
21.8Average contacts per company
1-10Median size (employees)
10.6%Largest-city concentration · Houston
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
614
11-50
371
51-200
149
201-500
43
501-1,000
19
1,001-5,000
11
5,001-10,000
2
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 1,212 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 plant consulting 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 8,592 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 September 27, 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.

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 plant consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many chemical plant consulting firms are there based in the United States?

RevenueBase identified 1,212 company matches for chemical plant consulting firms associated with the United States as of September 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 plant consulting firms?

Houston leads with 129 company records, followed by Tulsa (16) and Atlanta (14).

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 8,592 professional contacts with verified work emails tracked across these 1,212 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 September 27, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,212 chemical plant consulting firms based in the United States. Start with a free account, no credit card.

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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.