# List of Engineering Services companies in the United Kingdom

Tamtam tracks 77 Engineering Services companies headquartered in the United Kingdom. This list ranks the 50 largest by number of employees on LinkedIn, led by Petrofac, Atkins and PRIME GROUP. Their median headcount is 439. Half of them were founded in 1988 or later. The most common headquarters are London (10), Aberdeen (5) and Cambridge (3).

These companies in the United Kingdom are primarily large engineering services firms, many with a long history. They offer a broad range of specialized services, from energy infrastructure to digital systems. Petrofac, for example, is an international energy service provider, while Atkins transforms global infrastructure and energy systems. Ricardo is a global consulting firm focusing on transport, energy, and climate, and PRIME GROUP is an IT consulting and engineering group. Altrad Babcock specializes in construction and aftermarket services for various sectors, and Marshall works on military aircraft maintenance and manufacturing.

The data shows a concentration of headquarters in London, indicating a central hub for these operations. Many of these companies were founded in the 20th century, with several established before World War II, such as Ricardo (1915), Marshall (1909), and ABL (1856), suggesting a mature and established engineering sector.

🇬🇧 United Kingdom · 50 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Petrofac](https://www.tamtam.ai/c/petrofac) (petrofac.com)<br>International energy service provider specializing in designing, building, managing, and maintaining oil, gas, refining, and renewable energy infrastructure for leading energy companies worldwide | Engineering Services | 🇬🇧 London | 14,616 | 1981 |
| 2 | [Atkins](https://www.tamtam.ai/c/atkins) (atkinsrealis.com)<br>World-class engineering services and nuclear organization connecting people, data, and technology to transform global infrastructure and energy systems through design and management. | Engineering Services | 🇬🇧 Epsom | 9,798 |  |
| 3 | [PRIME GROUP](https://www.tamtam.ai/c/prime-group) (weareprimegroup.com)<br>A leading international IT consulting and engineering group with 12 companies, 3100 professionals, and offices across Europe, focusing on consultancy, nearshore, and software development | Engineering Services | 🇬🇧 London | 3,359 |  |
| 4 | [Ricardo](https://www.tamtam.ai/c/ricardo) (ricardo.com)<br>Global consulting firm providing strategic, environmental, and engineering solutions focused on transport, energy, and climate for sustainability. | Engineering Services | 🇬🇧 London | 2,888 | 1915 |
| 5 | [Bilfinger UK](https://www.tamtam.ai/c/bilfinger-uk) (bilfinger.com)<br>A leading engineering and maintenance provider with 4,000 employees in the UK, part of Europe's largest industrial services group | Engineering Services | 🇬🇧 Warrington | 2,688 | 1973 |
| 6 | [Cavendish Nuclear](https://www.tamtam.ai/c/cavendish-nuclear) (cavendishnuclear.com)<br>A leading nuclear services provider with international presence, specializing in innovative solutions across the nuclear energy life cycle | Engineering Services | 🇬🇧 Birchwood | 1,908 |  |
| 7 | [ABL](https://www.tamtam.ai/c/abl) (abl-group.com)<br>Global independent energy and marine consultant de-risking and driving energy transition, offering expertise in renewables, maritime, and oil and gas sectors worldwide | Engineering Services | 🇬🇧 London | 1,687 | 1856 |
| 8 | [Altrad Babcock](https://www.tamtam.ai/c/altrad-babcock) (altradbabcock.com)<br>Specialists in construction, aftermarket, and upgrade services for thermal power, nuclear, oil & gas, petrochemical, and process sectors worldwide | Engineering Services | 🇬🇧 Renfrew | 1,546 | 1891 |
| 9 | [Marshall](https://www.tamtam.ai/c/marshall) (marshallgroup.com)<br>Specializes in military aircraft maintenance, repair, overhaul, precision manufacturing, and bespoke mission conversions for global defense and aerospace clients. | Engineering Services | 🇬🇧 Cambridge | 1,273 | 1909 |
| 10 | [TWI](https://www.tamtam.ai/c/twi) (twi-global.com)<br>Global technology engineering leader offering research and consultancy services to members across various industries, specializing in structural integrity, materials testing, welding, and training | Engineering Services | 🇬🇧 Cambridge | 930 | 1968 |
| 11 | [Aureos](https://www.tamtam.ai/c/aureos) (aureos.com)<br>Multi-disciplinary services, design, engineering, installation, maintenance, crisis response for essential infrastructure across power, renewables, nuclear, railways, highways, local governments. | Engineering Services | 🇬🇧 | 907 |  |
| 12 | [RED Engineering Design](https://www.tamtam.ai/c/red-engineering-design) (red-eng.com)<br>Specialist building services and ICT engineers providing technical expertise to enable digital infrastructure and achieve zero carbon built environments globally. | Engineering Services | 🇬🇧 London | 862 | 2004 |
| 13 | [SES Engineering Services](https://www.tamtam.ai/c/ses-engineering-services) (ses-ltd.co.uk)<br>A design-led M&E provider with a rich history of engineering excellence, focusing on innovative and digital solutions for complex projects | Engineering Services | 🇬🇧 York | 723 | 1961 |
| 14 | [Briggs Equipment UK Ltd](https://www.tamtam.ai/c/briggs-equipment-uk-ltd) (briggsequipment.co.uk)<br>Unique engineering and equipment provider offering Hyster and Yale materials handling products, full servicing, finance, rental, and asset management support. | Engineering Services | 🇬🇧 Cannock | 700 | 2006 |
| 15 | [Altrad Sparrows](https://www.tamtam.ai/c/altrad-sparrows) (altradsparrows.com)<br>Global provider of specialist equipment and engineering services to energy and industrial sectors Offers tailored solutions for lifting, handling, cable laying, and fluid power needs worldwide | Engineering Services | 🇬🇧 Aberdeen | 662 | 1975 |
| 16 | [Aktrion Group](https://www.tamtam.ai/c/aktrion-group) (aktrion.com)<br>The company provides fully managed quality support solutions for the automotive industry, including remarketing centers and optimizing product quality and efficiency | Engineering Services | 🇬🇧 Telford | 601 | 1992 |
| 17 | [Protec Fire and Security Group](https://www.tamtam.ai/c/protec-fire-and-security-group) (protec.co.uk)<br>A leading life safety systems integrator with 55 years of experience, offering reliable products and services across diverse building sectors globally | Engineering Services | 🇬🇧 Nelson | 584 | 1968 |
| 18 | [ALTEN LTD - UK](https://www.tamtam.ai/c/alten-ltd-uk) (alten.co.uk)<br>Leading global engineering and IT consultancy, supporting clients' development strategies with focus on innovation, R&D in various sectors like aerospace, automotive, and IT. | Engineering Services | 🇬🇧 London | 563 | 1988 |
| 19 | [nexos](https://www.tamtam.ai/c/nexos) (nexos.solutions)<br>A diverse workforce providing fully integrated services for Brownfield EPC scopes for offshore assets, focusing on efficiency and cost-effectiveness | Engineering Services | 🇬🇧 Aberdeen | 543 |  |
| 20 | [Genesis](https://www.tamtam.ai/c/genesis-london) (genesisenergies.com)<br>A market-leading advisory company specializing in providing technical and advisory services for the energy industry, focused on sustainability and innovation | Engineering Services | 🇬🇧 London | 531 |  |
| 21 | [Quartzelec Limited](https://www.tamtam.ai/c/quartzelec-limited) (quartzelec.com)<br>A leading independent electrical engineering group offering solutions and services for industrial, infrastructure, commercial sectors, with 100+ years of experience worldwide | Engineering Services | 🇬🇧 Rugby | 508 |  |
| 22 | [SMD](https://www.tamtam.ai/c/smd-wallsend) (smd.co.uk)<br>Global designer and manufacturer of subsea remotely operated and autonomous power and control solutions, specializing in trenching, ROVs, submerged minerals, and vessel deck equipment | Engineering Services | 🇬🇧 Wallsend | 495 | 1971 |
| 23 | [Fichtner Consulting Engineers Ltd](https://www.tamtam.ai/c/fichtner-consulting-engineers-ltd) (fichtner.co.uk)<br>Independent engineering consultancy firm providing technical advisory and project management services in various sectors, with a focus on impartiality and client interests | Engineering Services | 🇬🇧 Stockport | 449 | 1991 |
| 24 | [WGM Engineering Ltd](https://www.tamtam.ai/c/wgm-engineering-ltd) (wgmengineering.co.uk)<br>A Glasgow-based family business offering safe and sustainable engineering solutions including mechanical, electrical, civil engineering, renewable energy, project management, and more | Engineering Services | 🇬🇧 Glasgow | 440 | 1986 |
| 25 | [TEAM, Inc. UK, Africa, Caspian](https://www.tamtam.ai/c/team-inc-uk-africa-caspian) (teaminc.com)<br>A leading industrial services company specializing in construction, maintenance, and monitoring of pressurized piping systems for various industries worldwide ISO9001 and ISO14001 accredited | Engineering Services | 🇬🇧 Kendal | 439 | 1929 |
| 26 | [TR, part of the Trifast plc group](https://www.tamtam.ai/c/tr-part-of-the-trifast-plc-group) (trfastenings.com)<br>An international specialist in industrial fastenings & components, providing design, engineering, manufacturing, & distribution services to global assembly industries worldwide | Engineering Services | 🇬🇧 Walsall | 424 | 1973 |
| 27 | [Capula](https://www.tamtam.ai/c/capula) (capula.com)<br>A leader in system integration for industrial environments, focusing on digital transformation and operational technology to optimize efficiency, performance, and safety | Engineering Services | 🇬🇧 Stone | 412 | 1969 |
| 28 | [adi Group](https://www.tamtam.ai/c/adi-group) (linktr.ee)<br>Specializing in engineering services, the company supports manufacturing sectors in the UK & Ireland, offering a wide range of solutions | Engineering Services | 🇬🇧 Kings Norton | 379 | 1990 |
| 29 | [Retronix Semiconductor](https://www.tamtam.ai/c/retronix-semiconductor) (retronixsemiconductor.com)<br>Global engineering service provider specializing in semiconductor and high-tech manufacturing industries Services include equipment relocation, tool refurbishment, project management, labor support, and surplus parts handling | Engineering Services | 🇬🇧 Bellshill | 341 | 2004 |
| 30 | [BMSI](https://www.tamtam.ai/c/bmsi) (bmsi.co.uk)<br>The company is the UK's leading independent systems integrator of Building Energy Management Systems, helping businesses reduce energy costs and achieve environmental goals | Engineering Services | 🇬🇧 Maidenhead | 338 | 1999 |
| 31 | [Rainham Industrial Services Ltd](https://www.tamtam.ai/c/rainham-industrial-services-ltd) (rainhamis.com)<br>Specialist industrial services company in the UK, offering installation, maintenance, refurbishment, and decommissioning for various sectors with a focus on innovative solutions | Engineering Services | 🇬🇧 Essex | 325 | 2002 |
| 32 | [Juru](https://www.tamtam.ai/c/juru) (juru.org)<br>A leading energy and sustainability consultancy firm specializing in Central Asia and Caucasus, offering a wide range of services in sustainable energy projects | Engineering Services | 🇬🇧 London | 321 | 2015 |
| 33 | [TEXO](https://www.tamtam.ai/c/texo) (texo.co.uk)<br>Dynamic UK-based industrial services provider offering engineering, construction, surveying, design, recruitment, and more to support onshore and offshore projects with a strong focus on people development | Engineering Services | 🇬🇧 Aberdeen | 309 | 2018 |
| 34 | [MacTaggart Scott](https://www.tamtam.ai/c/mactaggart-scott) (mactag.com)<br>Scottish engineering company founded in 1898 specializing in providing equipment for Naval Defence and Marine industry, including lifts, handling systems, and propulsion units | Engineering Services | 🇬🇧 Loanhead | 267 | 1898 |
| 35 | [NIS Ltd](https://www.tamtam.ai/c/nis-ltd) (nisltd.com)<br>An engineering organization providing bespoke design and manufacturing services to quality-driven clients, aiming to deliver excellence while delighting customers | Engineering Services | 🇬🇧 Lancashire | 233 | 1983 |
| 36 | [Actemium UK](https://www.tamtam.ai/c/actemium-uk) (actemium.co.uk)<br>Delivers bespoke electrical, automation, and mechanical engineering solutions across various industries, critical infrastructure, and manufacturing, supporting operational efficiency and resilience. | Engineering Services | 🇬🇧 Birmingham | 229 | 1907 |
| 37 | [Cambridge Design Partnership](https://www.tamtam.ai/c/cambridge-design-partnership) (cambridge-design.com)<br>Innovative end-to-end partner for global brands and start-ups, creating breakthrough products and services through interdisciplinary collaboration and employee ownership | Engineering Services | 🇬🇧 Cambridge | 204 | 1996 |
| 38 | [Longitude Engineering](https://www.tamtam.ai/c/longitude-engineering) (longitude-engineering.com)<br>Specialist design and engineering services for marine, energy, and defence markets globally, with a client-focused approach and agile responsiveness | Engineering Services | 🇬🇧 London | 190 | 2006 |
| 39 | [Heyne Tillett Steel](https://www.tamtam.ai/c/heyne-tillett-steel) (hts.uk.com)<br>Employee-owned engineering firm specializing in structural and civil projects, known for innovative design solutions, rigorous quality assurance, and collaboration with top industry professionals | Engineering Services | 🇬🇧 London | 175 | 2007 |
| 40 | [Apollo](https://www.tamtam.ai/c/apollo-aberdeen) (apollo.engineer)<br>A prominent consultancy specializing in engineering and advisory services for hydrogen, carbon capture, renewables, nuclear, and oil and gas industries Multiple office locations | Engineering Services | 🇬🇧 Aberdeen | 167 | 2010 |
| 41 | [Parker Technical Services - PAGE CLOSED](https://www.tamtam.ai/c/parker-technical-services-page-closed) (march-engineering.com)<br>Parker Technical Services offers tailored technical solutions for the built environment, specializing in project management, energy solutions, and facilities services | Engineering Services | 🇬🇧 Multiple Locations UK-wide | 160 | 1911 |
| 42 | [Drive System Design](https://www.tamtam.ai/c/drive-system-design) (drivesystemdesign.com)<br>Specializing in rapid engineering and development of sustainable electrified propulsion systems, offering expertise in systems integration, simulation design, and development testing | Engineering Services | 🇬🇧 Detroit | 160 | 2007 |
| 43 | [Maritime Developments Limited](https://www.tamtam.ai/c/maritime-developments-limited) (maritimedevelopments.com)<br>Specializing in engineering solutions for global offshore industries, we offer bespoke lifting equipment, project engineering support, modular flex-lay equipment, and expert offshore personnel for successful project execution | Engineering Services | 🇬🇧 Aberdeen | 156 | 1999 |
| 44 | [24-7 Group](https://www.tamtam.ai/c/24-7-group) (24-7group.co.uk)<br>Integrated facilities management, engineering, and technical services delivering M&E projects, steelwork, fit-out, renewables, cabling, and fire systems nationwide. | Engineering Services | 🇬🇧 Knutsford | 155 | 2010 |
| 45 | [ACE Winches an Ashtead Technology company](https://www.tamtam.ai/c/ace-winches-an-ashtead-technology-company) (ashtead-technology.com)<br>Global leader in lifting, pulling, and deploying solutions across energy and civils sectors, offering bespoke equipment packages and unrivaled technical expertise | Engineering Services | 🇬🇧 Aberdeenshire | 155 | 1992 |
| 46 | [Consult Red](https://www.tamtam.ai/c/consult-red) (consult.red)<br>A technology consulting firm specializing in intelligent device and system development, offering expertise in product design, hardware, embedded, and cloud technology | Engineering Services | 🇬🇧 Shipley | 152 | 2003 |
| 47 | [UnitBirwelco](https://www.tamtam.ai/c/unitbirwelco) (unitbirwelco.com)<br>Design, manufacture, and maintenance of thermal equipment including flare systems, fired heaters, and heat exchangers for oil, gas, power, and pharmaceutical industries. | Engineering Services | 🇬🇧 Elba Crescent | 149 | 1892 |
| 48 | [Hyde Group Limited](https://www.tamtam.ai/c/hyde-group-limited) (hydegroup.com)<br>A UK-based engineering company with expertise in designing and manufacturing tooling solutions for commercial, defense, and nuclear industries, offering complete engineering services | Engineering Services | 🇬🇧 Dukinfield | 117 | 1968 |
| 49 | [Orano Limited](https://www.tamtam.ai/c/orano-limited) (orano.group)<br>A global company specializing in transforming nuclear materials to support energy development, offering services throughout the fuel cycle with a focus on safety and innovation | Engineering Services | 🇬🇧 Abingdon | 116 |  |
| 50 | [Nova Systems International](https://www.tamtam.ai/c/nova-systems-international) (novasystems.com)<br>Global engineering services and technology solutions company, specializing in keeping nations and people safe through defense, essential services, and cybersecurity partnerships worldwide | Engineering Services | 🇬🇧 Bristol | 105 | 2012 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

## More company lists in the United Kingdom

- [The largest companies in the United Kingdom](https://www.tamtam.ai/l/largest-companies-united-kingdom) (36,548)
- [Multinational companies in the United Kingdom](https://www.tamtam.ai/l/multinational-companies-united-kingdom) (7,458)
- [Financial services firms in the United Kingdom](https://www.tamtam.ai/l/financial-services-firms-united-kingdom) (3,711)
- [Financial Services companies in the United Kingdom](https://www.tamtam.ai/l/financial-services-companies-united-kingdom) (3,696)
- [Retail chains in the United Kingdom](https://www.tamtam.ai/l/retail-chains-united-kingdom) (3,289)
- [Professional services firms in the United Kingdom](https://www.tamtam.ai/l/professional-services-firms-united-kingdom) (2,706)
- [Software Development companies in the United Kingdom](https://www.tamtam.ai/l/software-development-companies-united-kingdom) (2,600)
- [Manufacturers in the United Kingdom](https://www.tamtam.ai/l/manufacturers-united-kingdom) (2,159)
- [Companies with in-house R&D in the United Kingdom](https://www.tamtam.ai/l/r-and-d-companies-united-kingdom) (1,930)
- [IT Services and IT Consulting companies in the United Kingdom](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-united-kingdom) (1,722)
- [Retail companies in the United Kingdom](https://www.tamtam.ai/l/retail-companies-united-kingdom) (1,596)
- [IT services companies in the United Kingdom](https://www.tamtam.ai/l/it-services-companies-united-kingdom) (1,583)
- [Hotel and hospitality groups in the United Kingdom](https://www.tamtam.ai/l/hospitality-groups-united-kingdom) (1,461)
- [Companies with a mobile app in the United Kingdom](https://www.tamtam.ai/l/companies-with-mobile-app-united-kingdom) (1,411)
- [Consulting firms in the United Kingdom](https://www.tamtam.ai/l/consulting-firms-united-kingdom) (1,298)
- [E-commerce companies in the United Kingdom](https://www.tamtam.ai/l/ecommerce-companies-united-kingdom) (1,246)
- [Hardware manufacturers in the United Kingdom](https://www.tamtam.ai/l/hardware-companies-united-kingdom) (1,239)
- [Family-owned companies in the United Kingdom](https://www.tamtam.ai/l/family-owned-companies-united-kingdom) (1,224)
- [Hospitality companies in the United Kingdom](https://www.tamtam.ai/l/hospitality-companies-united-kingdom) (1,204)
- [Critical infrastructure operators in the United Kingdom](https://www.tamtam.ai/l/critical-infrastructure-operators-united-kingdom) (1,195)
- [Wellness and Fitness Services companies in the United Kingdom](https://www.tamtam.ai/l/wellness-and-fitness-services-companies-united-kingdom) (1,151)
- [Retail Apparel and Fashion companies in the United Kingdom](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-united-kingdom) (1,085)
- [Subscription businesses in the United Kingdom](https://www.tamtam.ai/l/subscription-businesses-united-kingdom) (1,077)
- [Distributors and wholesalers in the United Kingdom](https://www.tamtam.ai/l/distributors-and-wholesalers-united-kingdom) (1,060)

## The same list elsewhere in United Kingdom

- [Engineering Services companies in England](https://www.tamtam.ai/l/engineering-services-companies-england) (58)

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Source: https://www.tamtam.ai/l/engineering-services-companies-united-kingdom