Company lists · Data refreshed September 2026

Top 25 Industrial control system security consultants based in the United Kingdom

Name: Industrial control system security consultants based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 658 companies tracked

RevenueBase identified 658 industrial control system security consultants headquartered in the United Kingdom as of September 2026 and tracks 6,660 professional contacts across them, including 2,445 with verified work emails. London is the largest hub.

This list covers industrial control system security consultants 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 28, 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 28, 2026 86% judged on-target in blind review

658Companies

6,660Contacts tracked

2,445Verified emails

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The 25 largest industrial control system security consultants based in the United Kingdom

Ranked by team size

Top 25 of 658 industrial control system security consultants based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to industrial control system security consultants: 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	Trinity Fire & Security Systems	Indirect evidence	Exeter, United KingdomHQ checked Sep 28, 2026	501-1,000	386 contacts →
	Indirect evidence “Trinity’s mission statement is simple - to provide high quality design, installation, commissioning and long term after care of Fire Detection, Fire Suppression, Life Safety and…” Source: RevenueBase Database · checked Sep 28, 2026
2	Bridewell	Partial evidence	Reading, United KingdomHQ checked Sep 28, 2026	201-500	303 contacts →
	Partial evidence “Bridewell is the trusted cyber security partner for organisations operating within Critical National Infrastructure (CNI), as well as companies who want the highest standard of…” Source: RevenueBase Database · checked Sep 28, 2026
3	Obrela	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	242 contacts →
	Strong evidence “Obrela Security Industries is a global provider of cyber security services.” Source: RevenueBase Database · checked Sep 28, 2026
4	Sapphire	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 28, 2026	51-200	168 contacts →
	Partial evidence “Sapphire delivers comprehensive cyber solutions tailored to your needs, spanning across consultancy, managed services, IT/OT and beyond.” Source: RevenueBase Database · checked Sep 28, 2026
5	Cyberfort	Strong evidence	Thatcham, United KingdomHQ checked Sep 28, 2026	51-200	159 contacts →
	Strong evidence “At Cyberfort we are passionate about the cyber security services we deliver for our customers which keeps their people, data, systems and technology infrastructure secure…” Source: RevenueBase Database · checked Sep 28, 2026
6	Trpglobal	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	126 contacts →
	Indirect evidence “We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Source: RevenueBase Database · checked Sep 28, 2026
7	Caretower An Integrity360 Company	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	97 contacts →
	Partial evidence “As an independent IT security specialist, Caretower provide comprehensive solutions to individual problems, thus allowing our recommendations to be unbiased.” Source: RevenueBase Database · checked Sep 28, 2026
8	ITC Secure	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	87 contacts →
	Partial evidence “ITC Secure is an advisory-led cyber security services company.” Source: RevenueBase Database · checked Sep 28, 2026
9	Amethyst Risk Management	Partial evidence	Basingstoke, United KingdomHQ checked Sep 28, 2026	11-50	85 contacts →
	Partial evidence “Amethyst Risk Management is a leading cybersecurity consultancy supplying expert services and support to the UK Government, Defence, Operators of Essential Services, and the…” Source: RevenueBase Database · checked Sep 28, 2026
10	Reliance Cyber	Indirect evidence	Waterloo, United KingdomHQ checked Sep 28, 2026	51-200	80 contacts →
	Indirect evidence “At Reliance Cyber, we believe in truly partnering with our customers.” Source: RevenueBase Database · checked Sep 28, 2026
11	Synoptix	Partial evidence	Bristol, United KingdomHQ checked Sep 28, 2026	51-200	75 contacts →
	Partial evidence “Synoptix was formed in 2011 to provide engineering solutions across various technical industries.” Source: RevenueBase Database · checked Sep 28, 2026
12	Saepio Information Security	Partial evidence	High Wycombe, United KingdomHQ checked Sep 28, 2026	51-200	74 contacts →
	Partial evidence “Saepio increase awareness, reduce risk and improve security in a continually evolving threat landscape.” Source: RevenueBase Database · checked Sep 28, 2026
13	Dionach By Nomios	Partial evidence	Oxford, United KingdomHQ checked Sep 28, 2026	51-200	73 contacts →
	Partial evidence “Dionach by Nomios has over 25 years of expertise in information security, supporting organisations in building resilience against ever‑evolving cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026
14	C&p Engineering Services LTD	Partial evidence	Swansea, United KingdomHQ checked Sep 28, 2026	51-200	62 contacts →
	Partial evidence “Through our integrated electrical, control & instrumentation services we design, construct & deliver complete projects & provide maintenance services to companies throughout the…” Source: RevenueBase Database · checked Sep 28, 2026
15	Evalian	Indirect evidence	Southampton, United KingdomHQ checked Sep 28, 2026	51-200	60 contacts →
	Indirect evidence “Many organisations are dealing with multiple frameworks, overlapping tools, disconnected ownership, and increasing pressure from regulators, customers, and boards.” Source: RevenueBase Database · checked Sep 28, 2026
16	Daintta	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	60 contacts →
	Indirect evidence “We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Source: RevenueBase Database · checked Sep 28, 2026
17	SQR Group Security Solutions LTD	Indirect evidence	Barnet, United KingdomHQ checked Sep 28, 2026	501-1,000	58 contacts →
	Indirect evidence “In today’s advanced, interconnected world, protecting the infrastructure that allows society to function is crucial.” Source: RevenueBase Database · checked Sep 28, 2026
18	Cyberlab	Strong evidence	Alderley Edge, United KingdomHQ checked Sep 28, 2026	51-200	57 contacts →
	Strong evidence “CyberLab is the UK-leading cyber security consultancy and managed services provider, trusted by over 1,200 enterprise businesses, government departments, and household names to…” Source: RevenueBase Database · checked Sep 28, 2026
19	Applied Integration UK LTD	Partial evidence	Stokesley, United KingdomHQ checked Sep 28, 2026	11-50	54 contacts →
	Partial evidence “Applied Integration is one of the UK’s leading independent systems integrators, delivering cutting edge solutions to 21st Century industry.” Source: RevenueBase Database · checked Sep 28, 2026
20	Simkiss Control Systems LTD	Strong evidence	Middleton, United KingdomHQ checked Sep 28, 2026	51-200	47 contacts →
	Strong evidence “Simkiss Control Systems, part of United Infrastructure Group, is a trusted name in the field of industrial automation and control systems.” Source: RevenueBase Database · checked Sep 28, 2026
21	Cornerstone	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	44 contacts →
	Partial evidence “CornerStone is an award winning, independent, security and digital building consulting firm with headquarters in the UK.” Source: RevenueBase Database · checked Sep 28, 2026
22	Computer Network Defence LTD CND	Strong evidence	Corsham, United KingdomHQ checked Sep 28, 2026	11-50	39 contacts →
	Strong evidence “Computer Network Defence Ltd are a UK based cyber security consultancy with an extremely broad spectrum of capability.” Source: RevenueBase Database · checked Sep 28, 2026
23	Omerta	Partial evidence	Saffron Walden, United KingdomHQ checked Sep 28, 2026	51-200	38 contacts →
	Partial evidence “Omerta - A Global Security Technology and Services Company.” Source: RevenueBase Database · checked Sep 28, 2026
24	Core Controls LTD	Partial evidence	Ilkeston, United KingdomHQ checked Sep 28, 2026	11-50	37 contacts →
	Partial evidence “Core Controls, part of Ipsum Group, are pioneers in the integration, control and automation of complex infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
25	Secarma LTD	Indirect evidence	Manchester, United KingdomHQ checked Sep 28, 2026	11-50	36 contacts →
	Indirect evidence “Secarma exists to keep the world safe.” Source: RevenueBase Database · checked Sep 28, 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: industrial control system security consultants. 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 industrial control system security consultants.
Partial evidence: Its own public description names part of industrial control system security consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial control system security consultants. 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 658 industrial control system security consultants based in the United Kingdom

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Industrial control system security consultants based in the United Kingdom at a glance

As of Sep 28, 2026

36.7%Verified-email coverage

10.1Average contacts per company

1-10Median size (employees)

33.4%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

432

11-50

170

51-200

201-500

501-1,000

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 658 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 industrial control system security consultants, 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 “industrial control system security consultants”. 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 industrial control system security consultants), 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 industrial control system security consultants, 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, 2,445 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 28, 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.

Industrial control system security consultants by metro

Industrial control system security consultants in London220

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 industrial control system security consultants, 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 industrial control system security consultants are there based in the United Kingdom?

RevenueBase identified 658 industrial control system security consultants 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?

Trinity Fire & Security Systems, headquartered in Exeter, tops this list with the largest team on record.

Which city has the most industrial control system security consultants?

London leads with 220 headquartered companies, followed by Manchester (20) and Bristol (11).

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 2,445 verified decision-maker contacts tracked across these 658 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 28, 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.