Company lists · Data refreshed September 2026
Top 25 Systems engineering consultants based in the United Kingdom
RevenueBase identified 1,206 systems engineering consultants headquartered in the United Kingdom as of September 2026 and tracks 14,948 professional contacts across them, including 6,164 with verified work emails. London is the largest hub.
This list covers systems engineering 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 18, 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.
The 25 largest systems engineering consultants based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,437 contacts → | ||||
Strong evidence “With offices in the UK and Australia, Frazer-Nash is a leading systems, engineering and technology company.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,103 contacts → | ||||
Strong evidence “We are an award-winning engineering consultancy with a creative team of engineers, designers, and technical specialists.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 3 | 437 contacts → | ||||
Indirect evidence “Welcome to Fairhurst: Fairhurst is a Limited Liability Partnership (LLP) of Consulting Engineers practicing in the UK, employing circa 400 staff in 16 principal offices.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 4 | 313 contacts → | ||||
Strong evidence “Morson Projects are a reputable multi-disciplinary engineering consultancy with over 40 years’ experience and 950 personnel across the UK and overseas.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 5 | 168 contacts → | ||||
Strong evidence “We’re a specialist engineering consultancy working nationally to deliver industry-leading engineering services and creative engineering designs that work for today and for future…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 6 | 163 contacts → | ||||
Partial evidence “Connecting You Across the UK and Worldwide Our team of accredited engineers and consultants cover a broad range of technologies, enabling us to deliver innovative solutions.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 7 | 156 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 8 | 146 contacts → | ||||
Indirect evidence “Harley Haddow are Civil, Structural, Mechanical, Electrical, Building Performance & Sustainability and Geotechnical Consulting Engineers.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 9 | 116 contacts → | ||||
Strong evidence “Nova Systems is a leading global engineering services and technology solutions company with more than employees working from strategically located offices around the world…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 10 | 106 contacts → | ||||
Strong evidence “NMSI specialises in systems, design and engineering, logistics, procurement and project management to deliver innovative solutions designed for purpose with low operating costs.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 11 | 96 contacts → | ||||
Indirect evidence “Crouch Waterfall is an established firm of Civil, Structural and Geotechnical Consulting Engineers with extensive experience of Railways, Buildings, Roads, Bridges and Waterways.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 12 | 93 contacts → | ||||
Partial evidence “Founded in 1953, Doran Consulting offers a wealth of expertise and experience in the creation of economic, innovative and sustainable engineering solutions.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 13 | 91 contacts → | ||||
Partial evidence “Pennant International Group plc was established over 65 years ago is a market-leading provider of systems support, technical services and training solutions that support the…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 14 | 91 contacts → | ||||
Partial evidence “GGP Consult is a privately-owned multidisciplinary Consulting Engineering Company which was established in 1994.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 15 | 89 contacts → | ||||
Indirect evidence “Narro is a team of Consulting Structural & Civil Engineers with offices in Edinburgh, Glasgow, Stirling, Inverness, Aberdeen, Newcastle, and London.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 16 | 88 contacts → | ||||
Partial evidence “Mechanical, Electrical, Design and Construction Services Since 1977, Picow Engineering has been delivering a cost-effective engineering service to a growing number of blue chip…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 17 | 79 contacts → | ||||
Strong evidence “At Burroughs, we believe our success as an engineering and project management consultancy stems from our core values of Quality, Integrity, and Experience.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 18 | 78 contacts → | ||||
Strong evidence “Principle One provides Systems Engineering, Architecture and Business Consulting services within the Law Enforcement, National Security, Health and wider public sector.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 19 | 77 contacts → | ||||
Indirect evidence “Will Rudd are Consulting Civil & Structural Engineers with an excellent track record in delivering a quality product.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 20 | 76 contacts → | ||||
Partial evidence “Bitwise enabling innovation with software engineering excellence.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 21 | 75 contacts → | ||||
Strong evidence “Eastwood Consulting Engineers are recognised as a leading Engineering Consultancy specialising in Civil, Structural, Geotechnical and Geo-environmental Engineering.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 22 | 75 contacts → | ||||
Partial evidence “Tessella is now Capgemini Engineering.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 23 | 75 contacts → | ||||
Partial evidence “Synoptix was formed in 2011 to provide engineering solutions across various technical industries.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 24 | 73 contacts → | ||||
Indirect evidence “Delap & Waller Mechanical and Electrical Building Services Engineers was founded in 1911, and to this day we remain a leader in the field of Mechanical and Electrical Building…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 25 | 68 contacts → | ||||
Strong evidence “JDP is a Building Services Engineering Consultancy with offices in Reading, employing engineers with practical design skills.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
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: systems engineering 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 systems engineering consultants.
- Partial evidence
- Its own public description names part of systems engineering consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name systems engineering 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 1,206 systems engineering consultants based in the United Kingdom
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Systems engineering consultants based in the United Kingdom at a glance
As of Sep 18, 2026Companies by employee count
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 1,206 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 systems engineering 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 “systems engineering 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 systems engineering 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 systems engineering 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, 6,164 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 18, 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.
Systems engineering consultants by metro
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 systems engineering 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 systems engineering consultants are there based in the United Kingdom?
RevenueBase identified 1,206 systems engineering 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?
Frazer-Nash Consultancy, headquartered in Leatherhead, tops this list with the largest team on record.
Which city has the most systems engineering consultants?
London leads with 161 headquartered companies, followed by Bristol (31) and Manchester (29).
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 6,164 verified decision-maker contacts tracked across these 1,206 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 18, 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.
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