Company lists · Data refreshed September 2026

Top 25 Process engineering firms based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 678 companies tracked

RevenueBase identified 678 process engineering firms headquartered in the United Kingdom as of September 2026 and tracks 21,656 professional contacts across them, including 3,271 with verified work emails. London is the largest hub.

This list covers process engineering firms headquartered in the United Kingdom, 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 17, 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 17, 2026 86% judged on-target in blind review

678Companies

21,656Contacts tracked

3,271Verified emails

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The 25 largest process engineering firms based in the United Kingdom

Ranked by team size

Top 25 of 678 process engineering firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to process engineering 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	Amec Foster Wheeler	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	10001+	14,368 contacts →
	Partial evidence “Wood Group has combined with Amec Foster Wheeler to form a new global leader in the delivery of project, engineering and technical services to energy and industrial markets.” Source: RevenueBase Database · checked Sep 17, 2026
2	KBR Granherne	Partial evidence	Leatherhead, United KingdomHQ checked Sep 17, 2026	501-1,000	648 contacts →
	Partial evidence “KBR Consulting is one of the world's foremost engineering consultancies specializing in the hydrocarbon and energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
3	MES	Partial evidence	Leatherhead, United KingdomHQ checked Sep 17, 2026	201-500	403 contacts →
	Partial evidence “Monaco Engineering Solutions (MES) is a specialised technical consultancy with a focus in the Oil & Gas, Petrochemical and Refining, Renewable & Clean Energy, Chemical…” Source: RevenueBase Database · checked Sep 17, 2026
4	MARCH	Indirect evidence	Multiple Locations Uk-wide, United KingdomHQ checked Sep 17, 2026	1,001-5,000	273 contacts →
	Indirect evidence “We are March.” Source: RevenueBase Database · checked Sep 17, 2026
5	Actemium UK	Partial evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	501-1,000	190 contacts →
	Partial evidence “At Actemium UK, we are expert electrical, automation and mechanical engineers delivering bespoke engineering solutions across industry, infrastructure and beyond.” Source: RevenueBase Database · checked Sep 17, 2026
6	Blackrow Group	Partial evidence	Grimsby, United KingdomHQ checked Sep 17, 2026	201-500	182 contacts →
	Partial evidence “For over 45 years, Blackrow Engineering has been delivering high-quality engineering, fabrication, and site services to clients across the UK and worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
7	Briggs Of Burton	Partial evidence	Burton-On-Trent, United KingdomHQ checked Sep 17, 2026	201-500	175 contacts →
	Partial evidence “Briggs are experienced Process Engineers, operating in the Brewing and Distilling sector since 1732 and responsible for some of the most high profile work of the last decade.” Source: RevenueBase Database · checked Sep 17, 2026
8	Zeeco Europe LTD	Indirect evidence	Rutland, United KingdomHQ checked Sep 17, 2026	51-200	171 contacts →
	Indirect evidence “The World Leader in Combustion and Environmental Systems Zeeco, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
9	Zeppelin Systems UK	Indirect evidence	Nottingham, United KingdomHQ checked Sep 17, 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 17, 2026
10	Scitech	Indirect evidence	Godalming, United KingdomHQ checked Sep 17, 2026	51-200	117 contacts →
	Indirect evidence “Specialist spaces demand specialist understanding.” Source: RevenueBase Database · checked Sep 17, 2026
11	Unitbirwelco	Indirect evidence	Elba Crescent, United KingdomHQ checked Sep 17, 2026	201-500	117 contacts →
	Indirect evidence “As a leading expert in thermal equipment, UnitBirwelco is dedicated to delivering excellence in design, project management, manufacturing, fabrication, construction, and…” Source: RevenueBase Database · checked Sep 17, 2026
12	MII Engineering	Partial evidence	Bedwas, United KingdomHQ checked Sep 17, 2026	201-500	104 contacts →
	Partial evidence “Being a dynamic, customer focused Engineering company enables us to tailor each of our services to particular clients.” Source: RevenueBase Database · checked Sep 17, 2026
13	ECS Engineering Services LTD	Strong evidence	Sutton In Ashfield, United KingdomHQ checked Sep 17, 2026	51-200	99 contacts →
	Strong evidence “ECS Engineering Services are a diverse mechanical, electrical, and process engineering contractor with over 35 years of experience.” Source: RevenueBase Database · checked Sep 17, 2026
14	Petrex Energy Services Limited	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	11-50	99 contacts →
	Partial evidence “Innovative Engineering Excellence for the energy sector through our engineering design & field development divisions.” Source: RevenueBase Database · checked Sep 17, 2026
15	Allied Protek	Partial evidence	Grimsby, United KingdomHQ checked Sep 17, 2026	51-200	96 contacts →
	Partial evidence “Allied Protek are a multidisciplinary design, engineering and project management company with bases in Grimsby and Runcorn, delivering capital projects across various sectors…” Source: RevenueBase Database · checked Sep 17, 2026
16	Intelect	Strong evidence	Middlesbrough, United KingdomHQ checked Sep 17, 2026	201-500	92 contacts →
	Strong evidence “At Intelect we have extensive experience providing engineering expertise to process industries involved in food & beverages manufacturing, utilities, heavy industry and renewable…” Source: RevenueBase Database · checked Sep 17, 2026
17	Katoni Engineering	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	51-200	90 contacts →
	Partial evidence “Katoni provides consulting, engineering, optimisation and emissions reduction support for the Energy Sector.” Source: RevenueBase Database · checked Sep 17, 2026
18	Wright Engineering	Partial evidence	Worksop, United KingdomHQ checked Sep 17, 2026	51-200	86 contacts →
	Partial evidence “For over 40 years, Wright Engineering has delivered complex industrial engineering projects that keep some of the UK's most demanding industries moving.” Source: RevenueBase Database · checked Sep 17, 2026
19	K Home International	Partial evidence	Stockton-on-tees, United KingdomHQ checked Sep 17, 2026	51-200	80 contacts →
	Partial evidence “With over 50 years of continued success, K Home International (KHI) is a family-owned, multi-discipline engineering design and construction company, based in Thornaby…” Source: RevenueBase Database · checked Sep 17, 2026
20	TDC Aberdeen	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	201-500	74 contacts →
	Indirect evidence “At TDC we focus on two fundamental areas of business; our customers and our people.” Source: RevenueBase Database · checked Sep 17, 2026
21	JBA Engineering	Partial evidence	Wynyard, United KingdomHQ checked Sep 17, 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 17, 2026
22	Technica LTD	Partial evidence	Grimsby, United KingdomHQ checked Sep 17, 2026	51-200	57 contacts →
	Partial evidence “Technica provide a range of services from front end design, detailed design, project management, project engineering, construction, commissioning and the supply of professional…” Source: RevenueBase Database · checked Sep 17, 2026
23	Sycamore Process Engineering LTD	Partial evidence	Yeovil, United KingdomHQ checked Sep 17, 2026	51-200	57 contacts →
	Partial evidence “At Sycamore, we are proudly known as the go-to experts in end-to-end process solutions.” Source: RevenueBase Database · checked Sep 17, 2026
24	Bendalls Engineering	Partial evidence	Carlisle, United KingdomHQ checked Sep 17, 2026	51-200	48 contacts →
	Partial evidence “Bendalls Engineering has a strong reputation in engineering, located in Carlisle, Cumbria.” Source: RevenueBase Database · checked Sep 17, 2026
25	KGD Industrial Services	Partial evidence	Hereford, United KingdomHQ checked Sep 17, 2026	51-200	48 contacts →
	Partial evidence “We provide in-house comprehensive engineering for all disciplines such as mechanical (3d modelling), electrical & instrumentation.” Source: RevenueBase Database · checked Sep 17, 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: process engineering 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 process engineering firms.
Partial evidence: Its own public description names part of process engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name process engineering 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 678 process engineering firms based in the United Kingdom

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Process engineering firms based in the United Kingdom at a glance

As of Sep 17, 2026

15.1%Verified-email coverage

31.9Average contacts per company

1-10Median size (employees)

6.3%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

412

11-50

174

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 678 companies.

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 process engineering 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.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “process engineering 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 process engineering 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 process engineering firms, 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, 3,271 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 17, 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.

Process engineering firms by metro

Process engineering firms in London43
Process engineering firms in Aberdeen27

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 process engineering 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 process engineering firms are there based in the United Kingdom?

RevenueBase identified 678 process engineering firms headquartered in the United Kingdom 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?

Amec Foster Wheeler, headquartered in Aberdeen, tops this list with the largest team on record.

Which city has the most process engineering firms?

London leads with 43 headquartered companies, followed by Aberdeen (27) and Manchester (16).

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 3,271 verified decision-maker contacts tracked across these 678 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 17, 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 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.