Company lists · Data refreshed September 2026

Top 25 Chemical plant design firms worldwide

Name: Chemical plant design firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 14,219 companies tracked

RevenueBase identified 14,219 chemical plant design firms worldwide as of September 2026 and tracks 350,304 professional contacts across them, including 99,844 with verified work emails and 0 with mobile numbers. The United States is the largest market and Tehran the largest hub.

This list covers chemical plant design firms worldwide, 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 16, 2026. Country and city lists for chemical plant design firms follow the table.

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

14,219Companies

350,304Contacts tracked

99,844Verified emails

0Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest chemical plant design firms worldwide

Ranked by team size

Top 25 of 14,219 chemical plant design firms worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to chemical plant design firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	WOOD	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 16, 2026	10001+	26,949 contacts →
	Indirect evidence “Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.” Source: RevenueBase Database · checked Sep 16, 2026
2	Tata Consulting Engineers	Indirect evidence	Mumbai, IndiaHQ checked Sep 16, 2026	5,001-10,000	8,440 contacts →
	Indirect evidence “Tata Consulting Engineers Limited (TCE) is the largest Indian private sector engineering and project consultancy and an emerging global leader in integrated engineering solutions.” Source: RevenueBase Database · checked Sep 16, 2026
3	Zachry Group	Partial evidence	San Antonio, TX, United StatesHQ checked Sep 16, 2026	10001+	6,824 contacts →
	Partial evidence “Zachry Group is North America's pacesetter in turnkey engineering, construction, maintenance, turnaround and fabrication services to the energy, chemicals, power, manufacturing…” Source: RevenueBase Database · checked Sep 16, 2026
4	Terracon	Indirect evidence	Olathe, KS, United StatesHQ checked Sep 16, 2026	5,001-10,000	6,113 contacts →
	Indirect evidence “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Source: RevenueBase Database · checked Sep 16, 2026
5	Power Engineers	Indirect evidence	Hailey, ID, United StatesHQ checked Sep 16, 2026	1,001-5,000	4,013 contacts →
	Indirect evidence “POWER Engineers is now part of WSP.” Source: RevenueBase Database · checked Sep 16, 2026
6	S&b	Partial evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	5,001-10,000	3,510 contacts →
	Partial evidence “S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.” Source: RevenueBase Database · checked Sep 16, 2026
7	Golder	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 16, 2026	5,001-10,000	3,167 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 16, 2026
8	Toyo Engineering Corporation	Partial evidence	Chiba-shi Mihama-ku, JapanHQ checked Sep 16, 2026	1,001-5,000	2,760 contacts →
	Partial evidence “Toyo Engineering is an engineering company that constructs the plant in a global stage centering on the plant engineering field.” Source: RevenueBase Database · checked Sep 16, 2026
9	Priner	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 16, 2026	5,001-10,000	2,737 contacts →
	Indirect evidence “Há mais de 40 anos, a Priner se destaca no setor de engenharia industrial e infraestrutura, oferecendo soluções com excelência técnica, seguras e eficientes.” Source: RevenueBase Database · checked Sep 16, 2026
10	Multiconsult	Partial evidence	Oslo, NorwayHQ checked Sep 16, 2026	1,001-5,000	2,553 contacts →
	Partial evidence “Multiconsult Norway is one of the leading firms of architectures, consulting engineers and designers in Norway.” Source: RevenueBase Database · checked Sep 16, 2026
11	The Haskell Company	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,213 contacts →
	Indirect evidence “Haskell delivers over $3 billion annually in Architecture, Engineering, Construction (AEC) and Consulting solutions to assure certainty of outcome for complex capital projects…” Source: RevenueBase Database · checked Sep 16, 2026
12	ECS Group Of Companies	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,210 contacts →
	Indirect evidence “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Source: RevenueBase Database · checked Sep 16, 2026
13	Colliers Engineering & Design	Partial evidence	Holmdel, NJ, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,049 contacts →
	Partial evidence “Colliers Engineering & Design, an affiliate of Colliers, is a trusted provider of multi-discipline engineering and architecture, design and consulting services to public and…” Source: RevenueBase Database · checked Sep 16, 2026
14	IMEG	Indirect evidence	Rock Island, IL, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,985 contacts →
	Indirect evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 16, 2026
15	Aarvi Encon	Indirect evidence	Mumbai, IndiaHQ checked Sep 16, 2026	5,001-10,000	1,890 contacts →
	Indirect evidence “Aarvi Encon has established it's leadership in providing Engineering Consultancy and Technical Assistance to Oil & Gas, Refinery, Petrochemical, Pipelines, Power & Infrastructure…” Source: RevenueBase Database · checked Sep 16, 2026
16	Hargrove Engineers & Constructors	Indirect evidence	Mobile, AL, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,877 contacts →
	Indirect evidence “Hargrove is a full-service engineering, procurement, and construction management firm delivering multi-discipline engineering, project delivery, controls & automation, and…” Source: RevenueBase Database · checked Sep 16, 2026
17	ILF Consulting Engineers	Indirect evidence	FranceHQ checked Sep 16, 2026	1,001-5,000	1,747 contacts →
	Indirect evidence “The ILF Group (ILF) is an international engineering and consulting firm that helps its clients successfully execute technically demanding industrial and infrastructure projects.” Source: RevenueBase Database · checked Sep 16, 2026
18	Burns & Mcdonnell India	Partial evidence	Vikhroli West, IndiaHQ checked Sep 16, 2026	1,001-5,000	1,724 contacts →
	Partial evidence “At Burns & McDonnell India, we are a diverse team of talented engineers with multidiscipline design and consultancy working across sectors in critical infrastructure: oil and gas…” Source: RevenueBase Database · checked Sep 16, 2026
19	Exponent	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,560 contacts →
	Indirect evidence “In an era of accelerating change, Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most…” Source: RevenueBase Database · checked Sep 16, 2026
20	BW Design Group	Partial evidence	St Louis, MO, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,555 contacts →
	Partial evidence “BW Design Group is the only independent, fully integrated AEC firm powered by a Manufacturer's Mindset™.” Source: RevenueBase Database · checked Sep 16, 2026
21	Bilfinger Engineering	Partial evidence	Schiedam, NetherlandsHQ checked Sep 16, 2026	1,001-5,000	1,535 contacts →
	Partial evidence “Engineering for greenfield plants or modification and modernization projects for brownfield plants: Bilfinger delivers the optimized solution for our customers in terms of…” Source: RevenueBase Database · checked Sep 16, 2026
22	Chiyoda Corporation	Partial evidence	Yokohama, JapanHQ checked Sep 16, 2026	5,001-10,000	1,514 contacts →
	Partial evidence “Since its establishment in 1948, Chiyoda's business field has covered the energy sector such as oil and gas industry including energy conservation, and chemicals, environment…” Source: RevenueBase Database · checked Sep 16, 2026
23	EKIUM	Indirect evidence	Lyon Cedex 07, FranceHQ checked Sep 16, 2026	1,001-5,000	1,502 contacts →
	Indirect evidence “Welcome to Ekium!” Source: RevenueBase Database · checked Sep 16, 2026
24	Vulcain Engineering Group	Indirect evidence	Neuilly-sur-seine, FranceHQ checked Sep 16, 2026	5,001-10,000	1,496 contacts →
	Indirect evidence “Vulcain Engineering Group is a multi-specialist engineering and consulting group serving industrial companies across the globe, focused on critical sectors: energy, health…” Source: RevenueBase Database · checked Sep 16, 2026
25	RENCO	Indirect evidence	Pesaro, ItalyHQ checked Sep 16, 2026	1,001-5,000	1,494 contacts →
	Indirect evidence “Renco S.p.A, an Italian company founded in 1979, is continually committed to providing its Clients with sound business solutions in an ever increasingly complex and challenging…” Source: RevenueBase Database · checked Sep 16, 2026

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 plant design firms. 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 plant design firms.
Partial evidence: Its own public description names part of chemical plant design firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name chemical plant design firms. 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 14,219 chemical plant design firms worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 99,844 reachable decision-makers.

Free signup · no credit card

View the full list →

Chemical plant design firms worldwide at a glance

As of Sep 16, 2026

28.5%Verified-email coverage

24.6Average contacts per company

11-50Median size (employees)

1.7%Largest-city concentration · Tehran

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

6,658

11-50

4,867

51-200

1,843

201-500

482

501-1,000

168

1,001-5,000

118

5,001-10,000

10001+

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 plant design firms, 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.
Coverage: 47 countries, largest first: the United States, Brazil, India, Italy, Germany, France, Spain, the United Kingdom, Canada, Türkiye and 37 more. Country and city lists for chemical plant design firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “chemical plant design firms”. 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 plant design firms), 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 plant design firms, and records with no verified work email.
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, 99,844 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 16, 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.

Chemical plant design firms by location

68 lists · largest first

Every Chemical plant design firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 chemical plant design firms, 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 chemical plant design firms are there worldwide?

RevenueBase identified 14,219 chemical plant design firms worldwide 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?

WOOD, headquartered in Aberdeen, tops this list with the largest team on record.

Which country has the most chemical plant design firms?

The United States leads with 2,182 companies, followed by Brazil (1,633) and India (1,158). Every chemical plant design firms list by country and city is linked on this page.

Which city has the most chemical plant design firms?

Tehran leads with 235 headquartered companies, followed by Sao Paulo (176) and Houston (141).

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 99,844 verified decision-maker contacts tracked across these 14,219 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 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 14,219 chemical plant design firms worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.