Company lists · Data refreshed September 2026

Top 25 Defence consulting firms based in the United Kingdom

Name: Defence consulting 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 21, 2026 278 companies tracked

RevenueBase identified 278 defence consulting firms headquartered in the United Kingdom as of September 2026 and tracks 4,080 professional contacts across them, including 719 with verified work emails. London is the largest hub.

This list covers defence consulting 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 21, 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 21, 2026 86% judged on-target in blind review

278Companies

4,080Contacts tracked

719Verified emails

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The 25 largest defence consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 278 defence consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to defence consulting 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	Sibylline	Indirect evidence	Global, United KingdomHQ checked Sep 21, 2026	201-500	289 contacts →
	Indirect evidence “Sibylline is the world’s leading private consultancy for geopolitical risk, intelligence, and strategic insight, dedicated to helping leaders and organisations anticipate change…” Source: RevenueBase Database · checked Sep 21, 2026
2	Inzpire	Partial evidence	Lincoln, United KingdomHQ checked Sep 21, 2026	201-500	277 contacts →
	Partial evidence “Inzpire is a leading provider of defence consultancy and cutting-edge training solutions, delivering mission-critical services to the UK Armed Forces and international allies.” Source: RevenueBase Database · checked Sep 21, 2026
3	CDS Defence & Security	Partial evidence	Cheltenham, United KingdomHQ checked Sep 21, 2026	51-200	156 contacts →
	Partial evidence “CDS Defence & Security is a technical consultancy working to enhance operational effectiveness and bring about behavioural change in the defence sector.” Source: RevenueBase Database · checked Sep 21, 2026
4	AKE International	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	89 contacts →
	Indirect evidence “We are proud of our unique track record.” Source: RevenueBase Database · checked Sep 21, 2026
5	Black Onyx Concepts	Indirect evidence	Stoke-on-trent, United KingdomHQ checked Sep 21, 2026	51-200	71 contacts →
	Indirect evidence “MITIGATING THREATS TO YOUR BUSINESS • We offer an array of security support services aligned to individual client requirements and reflective of our holistic, systematic and…” Source: RevenueBase Database · checked Sep 21, 2026
6	Quanta Training	Indirect evidence	Worcester, United KingdomHQ checked Sep 21, 2026	51-200	67 contacts →
	Indirect evidence “Since 1991 Quanta has offered an unparalleled training experience.” Source: RevenueBase Database · checked Sep 21, 2026
7	Company X Consulting LTD	Partial evidence	Swindon, United KingdomHQ checked Sep 21, 2026	51-200	54 contacts →
	Partial evidence “We are a Small to Medium Enterprise (SME) Consultancy Company, formed in 2013, and recruit very high calibre, predominantly ex-military (or defence) professionals.” Source: RevenueBase Database · checked Sep 21, 2026
8	Shephard Group	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	43 contacts →
	Partial evidence “Shephard Group delivers trusted insight and marketing solutions to support informed decisions across the global defence ecosystem.” Source: RevenueBase Database · checked Sep 21, 2026
9	Minerva Elite LTD	Indirect evidence	Hereford, United KingdomHQ checked Sep 21, 2026	11-50	40 contacts →
	Indirect evidence “Minerva Elite is a niche consultancy providing high quality bespoke security and risk management solutions to its clients.” Source: RevenueBase Database · checked Sep 21, 2026
10	Vedette Consulting	Indirect evidence	Maidenhead, United KingdomHQ checked Sep 21, 2026	11-50	39 contacts →
	Indirect evidence “Vedette is a boutique consultancy that enables our clients to make optimised decisions to deliver productivity, efficiency, resilience and agility.” Source: RevenueBase Database · checked Sep 21, 2026
11	Aviation Requirements	Partial evidence	Sherborne, United KingdomHQ checked Sep 21, 2026	51-200	33 contacts →
	Partial evidence “Aviation Requirements (AR) is an established Defence Consultancy providing specialist support to the UK Ministry of Defence (MoD) and Defence Sector Industries.” Source: RevenueBase Database · checked Sep 21, 2026
12	Othrys	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	33 contacts →
	Indirect evidence “Othrys is a global strategic and risk advisory firm founded in 2016.” Source: RevenueBase Database · checked Sep 21, 2026
13	Universal Defence And Security Solutions	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	29 contacts →
	Partial evidence “Defence and security services consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
14	Se24	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	24 contacts →
	Indirect evidence “A core member of the Chelsea Group Security & Crisis Management Division, Security Exchange is dedicated to the provision of specialist consultancy on a worldwide basis…” Source: RevenueBase Database · checked Sep 21, 2026
15	Anotherday	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	21 contacts →
	Strong evidence “AnotherDay is a new kind of defence & security consulting firm established to bring the power of effective intelligence and strategy to the challenge of safeguarding individuals…” Source: RevenueBase Database · checked Sep 21, 2026
16	EWS EW Solutions LTD	Indirect evidence	Long Bennington, United KingdomHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “EWS is a unique global consultancy unlike any other.” Source: RevenueBase Database · checked Sep 21, 2026
17	OSG Service Group	Indirect evidence	Wolverhampton, United KingdomHQ checked Sep 21, 2026	201-500	19 contacts →
	Indirect evidence “OSG Service Group is a first class professional service provider with a difference.” Source: RevenueBase Database · checked Sep 21, 2026
18	D J Goode & Associates LTD	Partial evidence	Alpheton, United KingdomHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “We are a leading firm of consulting & test engineers, specialising in the provision of counter terrorism advice, security design, blast and ballistic engineering, weapons effects…” Source: RevenueBase Database · checked Sep 21, 2026
19	Shield Reply	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	17 contacts →
	Partial evidence “Shield Reply specialises in driving technology-led transformational change for Defence and Security customers through the design and delivery of cloud-based services and solutions…” Source: RevenueBase Database · checked Sep 21, 2026
20	Steen Associates	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1-10	16 contacts →
	Partial evidence “Steen Associates is an independent mergers and acquisitions advisory firm specialising in cross-border transactions in the aerospace & defence and industrials sectors.” Source: RevenueBase Database · checked Sep 21, 2026
21	Fortice	Partial evidence	Bristol, United KingdomHQ checked Sep 21, 2026	11-50	15 contacts →
	Partial evidence “Fortice is an independent, purpose-driven recruitment & search business working across Defence, National Security and Dual-Use Technology.” Source: RevenueBase Database · checked Sep 21, 2026
22	Soteria Defence And Security LTD	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1-10	13 contacts →
	Partial evidence “Soteria Defence and Security Limited was formed in 2013 to provide a specialised and dynamic consultancy services to global industry customers and the UK Ministry of Defence.” Source: RevenueBase Database · checked Sep 21, 2026
23	Umbra International Group	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1-10	11 contacts →
	Indirect evidence “At UMBRA, we believe that true security extends far beyond protection.” Source: RevenueBase Database · checked Sep 21, 2026
24	CMS Strategic	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “We are a specialist communications consultancy for the defence, aerospace, and security sectors.” Source: RevenueBase Database · checked Sep 21, 2026
25	SGW Consulting Group	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “SGW work with planning authorities, architects, property developers, real estate management professionals, transportation and public sector clients to help create safe and secure…” Source: RevenueBase Database · checked Sep 21, 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: defence consulting 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 defence consulting firms.
Partial evidence: Its own public description names part of defence consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defence consulting 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 278 defence consulting firms based in the United Kingdom

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Defence consulting firms based in the United Kingdom at a glance

As of Sep 21, 2026

17.6%Verified-email coverage

14.7Average contacts per company

1-10Median size (employees)

36.3%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

206

11-50

51-200

201-500

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 278 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 defence consulting 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 “defence consulting 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 defence consulting 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 defence consulting 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, 719 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 21, 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.

Defence consulting firms by metro

Defence consulting firms in London101

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 defence consulting 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 defence consulting firms are there based in the United Kingdom?

RevenueBase identified 278 defence consulting 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?

Sibylline, headquartered in Global, tops this list with the largest team on record.

Which city has the most defence consulting firms?

London leads with 101 headquartered companies, followed by Bristol (11) and Bath (5).

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 719 verified decision-maker contacts tracked across these 278 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 21, 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.