Company lists · Data refreshed September 2026

Top 25 Refinery control systems integrators based in the United Kingdom

Name: Refinery control systems integrators based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 304 companies tracked

RevenueBase identified 304 refinery control systems integrators headquartered in the United Kingdom as of September 2026 and tracks 3,926 professional contacts across them, including 1,784 with verified work emails and 264 with mobile numbers. London is the largest hub.

This list covers refinery control systems integrators 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

304Companies

3,926Contacts tracked

1,784Verified emails

264Mobile numbers

Explore all 304 companies → Free signup · no credit card · 500 free credits

The 25 largest refinery control systems integrators based in the United Kingdom

Ranked by team size

Top 25 of 304 refinery control systems integrators based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names refinery control systems integrators: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	ProservPartial evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	501-1,000	924
	“Proserv is the controls technology partner powering progress across the global energy sector.” Source: company website · checked Sep 5, 2026
2	CapulaPartial evidence	Stone, United KingdomHQ checked Sep 5, 2026	201-500	351
	“What we do \| With a focus on operational technology and digital transformation, Capula has been a leader in advanced system integration for decades; optimising efficiency &…” Source: company website · checked Sep 5, 2026
3	DPS GroupIndirect evidence	Glenrothes, United KingdomHQ checked Sep 5, 2026	51-200	139
	“Shaping the future, together.” Source: company website · checked Sep 5, 2026
4	Sella Controls A Hima CompanyStrong evidence	Cheshire, United KingdomHQ checked Sep 5, 2026	51-200	120
	“SELLA CONTROLS - A HIMA Company, is a designer and supplier of integrated safety, control and automation systems and specialises in delivering the following: Process Control and…” Source: company website · checked Sep 5, 2026
5	Orbital GAS Systems Bilfinger NzeroStrong evidence	Stone, United KingdomHQ checked Sep 5, 2026	51-200	109
	“Over the past 30 years, Orbital has grown to become one of the UK's largest independent system integration organisations handling various contracts ranging in value.” Source: company website · checked Sep 5, 2026
6	Adsyst Automation LimitedStrong evidence	Yateley, United KingdomHQ checked Sep 5, 2026	51-200	93
	“As a System Integrator for over 35 years, Adsyst (Automation) Ltd has been providing complex Control Systems for Process Control, Automation and Telemetry to customers worldwide.” Source: company website · checked Sep 5, 2026
7	Denca Controls LTDStrong evidence	Widnes, United KingdomHQ checked Sep 5, 2026	51-200	66
	“Renowned across numerous sectors as 'the systems integrator of choice', we have built a reputation on delivering high quality, value-for-money solutions that enhance production…” Source: company website · checked Sep 5, 2026
8	C&p Engineering Services LTDPartial evidence	Swansea, United KingdomHQ checked Sep 5, 2026	51-200	62
	“Through our integrated electrical, control & instrumentation services we design, construct & deliver complete projects & provide maintenance services to companies throughout the…” Source: company website · checked Sep 5, 2026
9	Fairfield Control Systems LTDStrong evidence	Retford, United KingdomHQ checked Sep 5, 2026	51-200	61
	“Fairfield Control Systems Ltd specialise in the design, manufacture, installation, commissioning and service support of industrial control solutions across a wide range of markets.” Source: company website · checked Sep 5, 2026
10	LCA GroupStrong evidence	Harwarden, United KingdomHQ checked Sep 5, 2026	51-200	58
	“LCA Group is a leading provider of project design, manufacture, installation, commissioning and maintenance of electrical, instrumentation and control systems throughout the UK…” Source: company website · checked Sep 5, 2026
11	ID Systems UKPartial evidence	Cumbernauld, United KingdomHQ checked Sep 5, 2026	51-200	57
	“Since 2002, we have been providing turnkey solutions which bring together our core skills of mechanical, electrical, instrumentation, control and automation, and telemetry…” Source: company website · checked Sep 5, 2026
12	Applied Integration UK LTDStrong evidence	Stokesley, United KingdomHQ checked Sep 5, 2026	11-50	54
	“Applied Integration is one of the UK’s leading independent systems integrators, delivering cutting edge solutions to 21st Century industry.” Source: company website · checked Sep 5, 2026
13	Proeon Systems LTDStrong evidence	Norwich, United KingdomHQ checked Sep 5, 2026	51-200	47
	“Proeon Systems - an independent specialist systems integrator, with +20 years experience supplying control and safety solutions for complex and critical applications across the…” Source: company website · checked Sep 5, 2026
14	Simkiss Control Systems LTDStrong evidence	Middleton, United KingdomHQ checked Sep 5, 2026	51-200	47
	“Simkiss Control Systems, part of United Infrastructure Group, is a trusted name in the field of industrial automation and control systems.” Source: company website · checked Sep 5, 2026
15	MCS Control Systems LTDPartial evidence	Coventry, United KingdomHQ checked Sep 5, 2026	51-200	46
	“MCS has continually invested in technology and people to ensure that we provide cost-effective solutions for control applications.” Source: company website · checked Sep 5, 2026
16	OCU Hornbill LTDIndirect evidence	Neath, United KingdomHQ checked Sep 5, 2026	51-200	42
	“Hornbill Together.” Source: company website · checked Sep 5, 2026
17	Core Controls LTDPartial evidence	Ilkeston, United KingdomHQ checked Sep 5, 2026	11-50	37
	“Core Controls, part of Ipsum Group, are pioneers in the integration, control and automation of complex infrastructure.” Source: company website · checked Sep 5, 2026
18	Integro Design Engineering Associates Idea LTDIndirect evidence	Glasgow, United KingdomHQ checked Sep 5, 2026	11-50	35
	“IDEA Ltd.” Source: company website · checked Sep 5, 2026
19	Servelec ControlsStrong evidence	Sheffield, United KingdomHQ checked Sep 5, 2026	51-200	33
	“Servelec Controls develops and integrates bespoke mission-critical systems for national infrastructure by bringing together specialist hardware, software and world-class…” Source: company website · checked Sep 5, 2026
20	Building Technology Systems LTDStrong evidence	Warrington, United KingdomHQ checked Sep 5, 2026	11-50	29
	“Building Technology Systems design and install integrated building control systems for controlling HVAC systems, lighting, door access and CCTV.” Source: company website · checked Sep 5, 2026
21	PromtekPartial evidence	Stoke-on-trent, United KingdomHQ checked Sep 5, 2026	11-50	28
	“Are you manufacturing a product using a recipe to control quality?” Source: company website · checked Sep 5, 2026
22	Cougar Automation LimitedStrong evidence	Waterlooville, United KingdomHQ checked Sep 5, 2026	501-1,000	28
	“Cougar Automation is a leading System Integrator providing automation and control systems to industry, manufacturing and process plants (PLC, SCADA & MES).” Source: company website · checked Sep 5, 2026
23	KigtekStrong evidence	Bellshill, United KingdomHQ checked Sep 5, 2026	11-50	26
	“Kigtek Solutions Limited is an independent systems integrator and specialist provider of process control, management and safety systems solutions and services.” Source: company website · checked Sep 5, 2026
24	Optimal Industrial AutomationIndirect evidence	Bristol & Darlington, United KingdomHQ checked Sep 5, 2026	11-50	26
	“Optimal are now SciY!” Source: company website · checked Sep 5, 2026
25	CETIXStrong evidence	Rotherham, United KingdomHQ checked Sep 5, 2026	11-50	23
	“Cetix is an independent systems integrator and a proud member of the Ulmatec Group, with over 30 years' experience supplying industrial control systems and services.” Source: company website · checked Sep 5, 2026

Showing 25 of 304 refinery control systems integrators based in the United Kingdom

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Refinery control systems integrators based in the United Kingdom at a glance

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 12 HQs

264Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

180

11-50

51-200

201-500

501-1,000

Verified emails by last verification

0–30

1,669

31–60

103

61–90

90–180

180+

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 refinery control systems integrators, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “refinery control systems integrators”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among refinery control systems integrators, 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 an evidence 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, 1,784 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 5, 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 refinery control systems integrators are there based in the United Kingdom?

RevenueBase identified 304 refinery control systems integrators 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?

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

Which city has the most refinery control systems integrators?

London leads with 12 headquartered companies, followed by Sheffield (7) and Aberdeen (6).

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 1,784 verified decision-maker contacts tracked across these 304 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 5, 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.