Company lists · Data refreshed September 2026

Top 25 Chemical engineering companies based in the United Kingdom

Name: Chemical engineering companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 104 companies tracked

This directory lists 104 chemical engineering companies based in the United Kingdom, with contact coverage including 989 contacts and 312 email addresses. The list was updated in September 2026, and London is the single most-represented city among the companies listed. Use it to identify potential engineering, design, consulting, and project delivery partners.

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 6, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 6, 2026 86% judged on-target in blind review

104Companies

989Contacts tracked

312Verified emails

72Mobile numbers

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The 25 largest chemical engineering companies based in the United Kingdom

Ranked by team size

Top 25 of 104 chemical engineering companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to chemical engineering companies: 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	Zeppelin Systems UK	Indirect evidence	Nottingham, United KingdomHQ checked Sep 6, 2026	1,001-5,000	119 contacts →
	Indirect evidence “Zeppelin Systems specialises in industrial plants' design, construction, and technological upgrading for storing, conveying, mixing, dosing, and weighing high-quality bulk…” Source: RevenueBase Database · checked Sep 6, 2026
2	Thomas Swan & Co. LTD	Indirect evidence	Consett, United KingdomHQ checked Sep 6, 2026	51-200	87 contacts →
	Indirect evidence “Thomas Swan & Co.” Source: RevenueBase Database · checked Sep 6, 2026
3	JBA Engineering	Partial evidence	Wynyard, United KingdomHQ checked Sep 6, 2026	11-50	63 contacts →
	Partial evidence “JBA are industry-leading consultants, providing flexible engineering and design solutions, procurement, and construction services.” Source: RevenueBase Database · checked Sep 6, 2026
4	Sycamore Process Engineering LTD	Indirect evidence	Yeovil, United KingdomHQ checked Sep 6, 2026	51-200	57 contacts →
	Indirect evidence “At Sycamore, we are proudly known as the go-to experts in end-to-end process solutions.” Source: RevenueBase Database · checked Sep 6, 2026
5	Simon Carves	Partial evidence	Manchester, United KingdomHQ checked Sep 6, 2026	51-200	44 contacts →
	Partial evidence “Simon Carves Engineering is a full-service Process Engineering Contractor, providing a comprehensive range of services to the Process and Energy industries worldwide.” Source: RevenueBase Database · checked Sep 6, 2026
6	Otto Simon	Partial evidence	Cheadle, United KingdomHQ checked Sep 6, 2026	11-50	41 contacts →
	Partial evidence “Otto Simon is a process-led engineering consultancy and project delivery organisation, specialising in providing services to the industrial and financial sectors in the UK and…” Source: RevenueBase Database · checked Sep 6, 2026
7	OSL Consulting Engineers	Indirect evidence	Hull, United KingdomHQ checked Sep 6, 2026	51-200	41 contacts →
	Indirect evidence “OSL is a multi-disciplined team of creative, forward thinking technical specialists, working collaboratively with the energy and related sectors to provide quality implemented…” Source: RevenueBase Database · checked Sep 6, 2026
8	Integro Design Engineering Associates Idea LTD	Indirect evidence	Glasgow, United KingdomHQ checked Sep 6, 2026	11-50	35 contacts →
	Indirect evidence “IDEA Ltd.” Source: RevenueBase Database · checked Sep 6, 2026
9	Ezi-Dock Systems Limited	Partial evidence	Barlborough, United KingdomHQ checked Sep 6, 2026	51-200	28 contacts →
	Partial evidence “Ezi-Dock Systems are manufacturers of World Class, Life Science Process Solutions for Chemical, Pharmaceutical and Bio Pharmaceutical industries.” Source: RevenueBase Database · checked Sep 6, 2026
10	Hart Process Services	Partial evidence	Heaton Mersey, United KingdomHQ checked Sep 6, 2026	11-50	28 contacts →
	Partial evidence “Hart Process Services is a multi-discipline engineering design consultancy, delivering intelligent, practical solutions across the full project lifecycle – from concept to…” Source: RevenueBase Database · checked Sep 6, 2026
11	AXI	Partial evidence	Hull, United KingdomHQ checked Sep 6, 2026	11-50	20 contacts →
	Partial evidence “Axi was founded by industry experienced professionals with expertise in engineering, design, projects, and operations.” Source: RevenueBase Database · checked Sep 6, 2026
12	Prodecon	Partial evidence	Nantwich, United KingdomHQ checked Sep 6, 2026	11-50	19 contacts →
	Partial evidence “ProDecon is a leading provider of turnkey chemical cleaning, refinery decontamination and pre-commissioning cleaning services.” Source: RevenueBase Database · checked Sep 6, 2026
13	Witton Chemical Company LTD	Partial evidence	Bury St. Edmunds, United KingdomHQ checked Sep 6, 2026	11-50	18 contacts →
	Partial evidence “Witton Chemical Company specialises in the manufacture of fine chemicals and polymers, including product isolation and drying from flammable solvents, a variety of exothermic…” Source: RevenueBase Database · checked Sep 6, 2026
14	AI Process Systems LTD	Partial evidence	Barrowford, United KingdomHQ checked Sep 6, 2026	11-50	15 contacts →
	Partial evidence “Ai Process Systems Ltd are an engineering consultancy organisation that specialise in process design and project management for the manufacturing, process and packaging industries.” Source: RevenueBase Database · checked Sep 6, 2026
15	Jwci LTD	Partial evidence	Uttoxeter, United KingdomHQ checked Sep 6, 2026	11-50	14 contacts →
	Partial evidence “JWCI Ltd Process Engineers - Specialists in the food, dairy and chemical industries.” Source: RevenueBase Database · checked Sep 6, 2026
16	P & I Design LTD	Partial evidence	Thornaby-on-tees, United KingdomHQ checked Sep 6, 2026	11-50	13 contacts →
	Partial evidence “P&I Design Ltd Established in 1978, providing Consultancy, Engineering Design and Support Services to the Process Industry.” Source: RevenueBase Database · checked Sep 6, 2026
17	Greens Combustion Limited	Partial evidence	Poole, United KingdomHQ checked Sep 6, 2026	51-200	11 contacts →
	Partial evidence “Greens Combustion is a UK-based leader in combustion engineering, with 250+ years of combined expertise.” Source: RevenueBase Database · checked Sep 6, 2026
18	QSL -Quoile Services Limited	Strong evidence	Belfast, United KingdomHQ checked Sep 6, 2026	11-50	11 contacts →
	Strong evidence “QSL are a innovative engineering consultancy providing a broad range of services within the pharmaceutical and chemical manufacturing industries.” Source: RevenueBase Database · checked Sep 6, 2026
19	Busa Engineering	Partial evidence	Pembroke Dock, United KingdomHQ checked Sep 6, 2026	11-50	9 contacts →
	Partial evidence “Engineering for Power, Refining and Process Industries.” Source: RevenueBase Database · checked Sep 6, 2026
20	Charles Thompson Limited	Indirect evidence	Mexborough, United KingdomHQ checked Sep 6, 2026	11-50	9 contacts →
	Indirect evidence “Charles Thompson Limited (CTL) is a specialist designer and manufacturer of process plant equipment to industry sectors including oil & gas, petrochemical, pharmaceutical, agro…” Source: RevenueBase Database · checked Sep 6, 2026
21	Spiro Control	Indirect evidence	Chester, United KingdomHQ checked Sep 6, 2026	11-50	6 contacts →
	Indirect evidence “We are a team of experts in process control and process optimisation.” Source: RevenueBase Database · checked Sep 6, 2026
22	Haden Freeman	Strong evidence	Manchester, United KingdomHQ checked Sep 6, 2026	11-50	5 contacts →
	Strong evidence “Established in 1985 as Freeman Process Systems, a specialist process engineering consultancy serving the chemical and pharmaceutical industries, Haden Freeman Ltd has developed…” Source: RevenueBase Database · checked Sep 6, 2026
23	Pixon Chemie	Indirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	5 contacts →
	Indirect evidence “Pixon Chemie are a global company that focus on creating high-end, special chemistry molecules.” Source: RevenueBase Database · checked Sep 6, 2026
24	DJS Process Consulting LTD	Indirect evidence	Kiln Pit Hill, United KingdomHQ checked Sep 6, 2026	1-10	4 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 6, 2026
25	Paul Murray Catalysis Consulting LTD	Partial evidence	Bristol, United KingdomHQ checked Sep 6, 2026	1-10	3 contacts →
	Partial evidence “Paul Murray Catalysis Consulting helps companies to save money and resources through more efficient chemical processes.” Source: RevenueBase Database · checked Sep 6, 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 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 104 chemical engineering companies based in the United Kingdom

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Chemical engineering companies based in the United Kingdom at a glance

As of Sep 6, 2026

31.5%Verified-email coverage

7.3%Mobile-number coverage

9.5Average contacts per company

1-10Median size (employees)

7.7%Largest-city concentration · London

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

2950–30

1731–60

061–90

090–180

0180+

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 the United Kingdom 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 United Kingdom 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, 312 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 6, 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 104 chemical engineering companies based in the United Kingdom.

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 has the most chemical engineering companies in the directory?

London is the single most-represented city among the chemical engineering companies in the directory.

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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.