# The 50 largest Engineering Services companies in England
Tamtam tracks 58 Engineering Services companies headquartered in England. This list ranks the 50 largest by number of employees on LinkedIn, led by Petrofac, Atkins and PRIME GROUP. Their median headcount is 321. Half of them were founded in 1991 or later. The most common headquarters are London (10), Cambridge (3) and Bristol (2).
These engineering services companies in England include large, established firms. Petrofac specializes in energy infrastructure, while Atkins focuses on global infrastructure and energy systems. Ricardo provides strategic, environmental, and engineering solutions for sustainability, and ABL offers expertise in renewables, maritime, and oil and gas.
A notable concentration of these companies, including PRIME GROUP, Ricardo, ABL, ALTEN LTD - UK, and Genesis, have their headquarters in London. Many of these firms were founded in the latter half of the 20th century, with several, like Ricardo (1915) and Marshall (1909), having a long history.
π¬π§ England Β· 50 companies Β· Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Petrofac](https://www.tamtam.ai/c/petrofac) (petrofac.com)
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 | π¬π§ London | 14,616 | 1981 |
| 2 | [Atkins](https://www.tamtam.ai/c/atkins) (atkinsrealis.com)
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 | π¬π§ Epsom | 9,798 | |
| 3 | [PRIME GROUP](https://www.tamtam.ai/c/prime-group) (weareprimegroup.com)
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 | π¬π§ London | 3,359 | |
| 4 | [Ricardo](https://www.tamtam.ai/c/ricardo) (ricardo.com)
Global consulting firm providing strategic, environmental, and engineering solutions focused on transport, energy, and climate for sustainability. | Engineering Services | π¬π§ London | 2,888 | 1915 |
| 5 | [Bilfinger UK](https://www.tamtam.ai/c/bilfinger-uk) (bilfinger.com)
A leading engineering and maintenance provider with 4,000 employees in the UK, part of Europe's largest industrial services group | Engineering Services | π¬π§ Warrington | 2,688 | 1973 |
| 6 | [Cavendish Nuclear](https://www.tamtam.ai/c/cavendish-nuclear) (cavendishnuclear.com)
A leading nuclear services provider with international presence, specializing in innovative solutions across the nuclear energy life cycle | Engineering Services | π¬π§ Birchwood | 1,908 | |
| 7 | [ABL](https://www.tamtam.ai/c/abl) (abl-group.com)
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 | π¬π§ London | 1,687 | 1856 |
| 8 | [Marshall](https://www.tamtam.ai/c/marshall) (marshallgroup.com)
Specializes in military aircraft maintenance, repair, overhaul, precision manufacturing, and bespoke mission conversions for global defense and aerospace clients. | Engineering Services | π¬π§ Cambridge | 1,273 | 1909 |
| 9 | [TWI](https://www.tamtam.ai/c/twi) (twi-global.com)
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 | π¬π§ Cambridge | 930 | 1968 |
| 10 | [RED Engineering Design](https://www.tamtam.ai/c/red-engineering-design) (red-eng.com)
Specialist building services and ICT engineers providing technical expertise to enable digital infrastructure and achieve zero carbon built environments globally. | Engineering Services | π¬π§ London | 862 | 2004 |
| 11 | [Briggs Equipment UK Ltd](https://www.tamtam.ai/c/briggs-equipment-uk-ltd) (briggsequipment.co.uk)
Unique engineering and equipment provider offering Hyster and Yale materials handling products, full servicing, finance, rental, and asset management support. | Engineering Services | π¬π§ Cannock | 700 | 2006 |
| 12 | [Aktrion Group](https://www.tamtam.ai/c/aktrion-group) (aktrion.com)
The company provides fully managed quality support solutions for the automotive industry, including remarketing centers and optimizing product quality and efficiency | Engineering Services | π¬π§ Telford | 601 | 1992 |
| 13 | [Protec Fire and Security Group](https://www.tamtam.ai/c/protec-fire-and-security-group) (protec.co.uk)
A leading life safety systems integrator with 55 years of experience, offering reliable products and services across diverse building sectors globally | Engineering Services | π¬π§ Nelson | 584 | 1968 |
| 14 | [ALTEN LTD - UK](https://www.tamtam.ai/c/alten-ltd-uk) (alten.co.uk)
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 | π¬π§ London | 563 | 1988 |
| 15 | [Genesis](https://www.tamtam.ai/c/genesis-london) (genesisenergies.com)
A market-leading advisory company specializing in providing technical and advisory services for the energy industry, focused on sustainability and innovation | Engineering Services | π¬π§ London | 531 | |
| 16 | [Quartzelec Limited](https://www.tamtam.ai/c/quartzelec-limited) (quartzelec.com)
A leading independent electrical engineering group offering solutions and services for industrial, infrastructure, commercial sectors, with 100+ years of experience worldwide | Engineering Services | π¬π§ Rugby | 508 | |
| 17 | [SMD](https://www.tamtam.ai/c/smd-wallsend) (smd.co.uk)
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 | π¬π§ Wallsend | 495 | 1971 |
| 18 | [Fichtner Consulting Engineers Ltd](https://www.tamtam.ai/c/fichtner-consulting-engineers-ltd) (fichtner.co.uk)
Independent engineering consultancy firm providing technical advisory and project management services in various sectors, with a focus on impartiality and client interests | Engineering Services | π¬π§ Stockport | 449 | 1991 |
| 19 | [TEAM, Inc. UK, Africa, Caspian](https://www.tamtam.ai/c/team-inc-uk-africa-caspian) (teaminc.com)
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 | π¬π§ Kendal | 439 | 1929 |
| 20 | [TR, part of the Trifast plc group](https://www.tamtam.ai/c/tr-part-of-the-trifast-plc-group) (trfastenings.com)
An international specialist in industrial fastenings & components, providing design, engineering, manufacturing, & distribution services to global assembly industries worldwide | Engineering Services | π¬π§ Walsall | 424 | 1973 |
| 21 | [Capula](https://www.tamtam.ai/c/capula) (capula.com)
A leader in system integration for industrial environments, focusing on digital transformation and operational technology to optimize efficiency, performance, and safety | Engineering Services | π¬π§ Stone | 412 | 1969 |
| 22 | [adi Group](https://www.tamtam.ai/c/adi-group) (linktr.ee)
Specializing in engineering services, the company supports manufacturing sectors in the UK & Ireland, offering a wide range of solutions | Engineering Services | π¬π§ Kings Norton | 379 | 1990 |
| 23 | [BMSI](https://www.tamtam.ai/c/bmsi) (bmsi.co.uk)
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 | π¬π§ Maidenhead | 338 | 1999 |
| 24 | [Rainham Industrial Services Ltd](https://www.tamtam.ai/c/rainham-industrial-services-ltd) (rainhamis.com)
Specialist industrial services company in the UK, offering installation, maintenance, refurbishment, and decommissioning for various sectors with a focus on innovative solutions | Engineering Services | π¬π§ Essex | 325 | 2002 |
| 25 | [Juru](https://www.tamtam.ai/c/juru) (juru.org)
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 | π¬π§ London | 321 | 2015 |
| 26 | [NIS Ltd](https://www.tamtam.ai/c/nis-ltd) (nisltd.com)
An engineering organization providing bespoke design and manufacturing services to quality-driven clients, aiming to deliver excellence while delighting customers | Engineering Services | π¬π§ Lancashire | 233 | 1983 |
| 27 | [Actemium UK](https://www.tamtam.ai/c/actemium-uk) (actemium.co.uk)
Delivers bespoke electrical, automation, and mechanical engineering solutions across various industries, critical infrastructure, and manufacturing, supporting operational efficiency and resilience. | Engineering Services | π¬π§ Birmingham | 229 | 1907 |
| 28 | [Cambridge Design Partnership](https://www.tamtam.ai/c/cambridge-design-partnership) (cambridge-design.com)
Innovative end-to-end partner for global brands and start-ups, creating breakthrough products and services through interdisciplinary collaboration and employee ownership | Engineering Services | π¬π§ Cambridge | 204 | 1996 |
| 29 | [Longitude Engineering](https://www.tamtam.ai/c/longitude-engineering) (longitude-engineering.com)
Specialist design and engineering services for marine, energy, and defence markets globally, with a client-focused approach and agile responsiveness | Engineering Services | π¬π§ London | 190 | 2006 |
| 30 | [Heyne Tillett Steel](https://www.tamtam.ai/c/heyne-tillett-steel) (hts.uk.com)
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 | π¬π§ London | 175 | 2007 |
| 31 | [24-7 Group](https://www.tamtam.ai/c/24-7-group) (24-7group.co.uk)
Integrated facilities management, engineering, and technical services delivering M&E projects, steelwork, fit-out, renewables, cabling, and fire systems nationwide. | Engineering Services | π¬π§ Knutsford | 155 | 2010 |
| 32 | [Consult Red](https://www.tamtam.ai/c/consult-red) (consult.red)
A technology consulting firm specializing in intelligent device and system development, offering expertise in product design, hardware, embedded, and cloud technology | Engineering Services | π¬π§ Shipley | 152 | 2003 |
| 33 | [Hyde Group Limited](https://www.tamtam.ai/c/hyde-group-limited) (hydegroup.com)
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 | π¬π§ Dukinfield | 117 | 1968 |
| 34 | [Orano Limited](https://www.tamtam.ai/c/orano-limited) (orano.group)
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 | π¬π§ Abingdon | 116 | |
| 35 | [Nova Systems International](https://www.tamtam.ai/c/nova-systems-international) (novasystems.com)
Global engineering services and technology solutions company, specializing in keeping nations and people safe through defense, essential services, and cybersecurity partnerships worldwide | Engineering Services | π¬π§ Bristol | 105 | 2012 |
| 36 | [Synoptix](https://www.tamtam.ai/c/synoptix) (synoptix.co.uk)
Engineering solutions provider offering high-quality systems engineering support, access to scarce-skills experts, and expertise in systems, safety, and reliability engineering across industries | Engineering Services | π¬π§ Bristol | 86 | 2011 |
| 37 | [Rolton](https://www.tamtam.ai/c/rolton) (rolton.com)
A company specializing in innovative and sustainable design solutions, delivering projects with expertise, collaboration, and a focus on client satisfaction Engineering the Futureβ’ | Engineering Services | π¬π§ Higham Ferrers | 69 | 1981 |
| 38 | [City Science](https://www.tamtam.ai/c/city-science) (cityscience.com)
City Science specializes in using science and data to help organizations reduce carbon emissions, improve quality of life, and achieve sustainable carbon reduction targets | Engineering Services | π¬π§ Exeter | 68 | 2015 |
| 39 | [Laird](https://www.tamtam.ai/c/laird) (laird-assessors.com)
Providing automotive intelligence through expert witness reports with AI automation & human expertise, delivering fair, honest, efficient service with advanced tech solutions | Engineering Services | π¬π§ Wirral | 59 | 2000 |
| 40 | [Hydrotechnik UK Test Engineering Limited](https://www.tamtam.ai/c/hydrotechnik-uk-test-engineering-limited) (hydrotechnik.co.uk)
Distributor and manufacturer of hydraulic test points, sensors, dataloggers, and accessories for fluid and gas system analysis and testing. | Engineering Services | π¬π§ Nottingham | 31 | 1990 |
| 41 | [The Rockwood Group](https://www.tamtam.ai/c/the-rockwood-group) (rockwoodcomposites.com)
Specializing in composite component manufacturing using various processes for a range of industries, with a focus on precision, high performance, and cost-effective solutions | Engineering Services | π¬π§ Newton Abbot | 24 | 2010 |
| 42 | [ITP Group Ltd](https://www.tamtam.ai/c/itp-group-ltd) (itpgroup.co.uk)
A global leader in providing automotive styling solutions with over 40 years of experience, offering complete styling environments and digital design solutions to top automotive companies worldwide | Engineering Services | π¬π§ Rugby | 22 | 1978 |
| 43 | [ACEPP UK](https://www.tamtam.ai/c/acepp-uk) (heverett.com)
Assembles experienced teams for successful transfer of complex infrastructures to operators, applying expertise from construction engineering to testing, turning needs into tangible realities. | Engineering Services | π¬π§ | 19 | 2003 |
| 44 | [Enertechnos](https://www.tamtam.ai/c/enertechnos) (enertechnos.com)
A clean-tech innovator revolutionizing power delivery with Capacitive Transfer System technology for reduced losses, cost-effective solutions, and increased renewable energy utilization | Engineering Services | π¬π§ Kingston upon Thames | 17 | 2014 |
| 45 | [Helix Precision Machining Ltd](https://www.tamtam.ai/c/helix-precision-machining-ltd) (helixprecision.co.uk)
A precision machining company specializing in manufacturing components and special machines for various industries, with a focus on quality, customer satisfaction, and continuous improvement | Engineering Services | π¬π§ Hull | 13 | 2003 |
| 46 | [BIBBY PRECISION ENGINEERING LIMITED](https://www.tamtam.ai/c/bibby-precision-engineering-limited) (bibbyengineering.co.uk)
Specialized engineering and manufacturing company with 75 years of experience, offering precision parts, fabrication, and welding services to various industries | Engineering Services | π¬π§ Wirral | 13 | 1948 |
| 47 | [Gordon Murray Technologies](https://www.tamtam.ai/c/gordon-murray-technologies) (gordonmurraytechnologies.com)
Innovative company focused on bringing environmentally-friendly innovations to the mobility sector, prioritizing sustainability and reducing CO2 emissions in vehicles | Engineering Services | π¬π§ Guildford | 11 | |
| 48 | [Bradford Lifts Ltd](https://www.tamtam.ai/c/bradford-lifts-ltd) (bradfordlifts.com)
An independent and accredited lift company in the UK, specializing in maintenance, repairs, installations, and examinations with multiple accreditations and industry memberships | Engineering Services | π¬π§ Bradford | 9 | 2018 |
| 49 | [JVD Engineering Ltd](https://www.tamtam.ai/c/jvd-engineering-ltd) (jvdengineering.co.uk)
A Leeds-based sub-contract precision engineering company specializing in machining and fabrication of various materials, from mild steel to superalloys, with a focus on customer satisfaction | Engineering Services | π¬π§ Morley | 8 | 1991 |
| 50 | [O-Sport Design Limited](https://www.tamtam.ai/c/o-sport-design-limited)
Specializing in composite and plastics design, manufacturing, tooling, and 3D scanning with a new production facility for prototyping and low-medium volume capabilities | Engineering Services | π¬π§ Croughton | 7 | 2017 |
## 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 England
- [The largest companies in England](https://www.tamtam.ai/l/largest-companies-england) (32,641)
- [Retail chains in England](https://www.tamtam.ai/l/retail-chains-england) (2,917)
- [Manufacturers in England](https://www.tamtam.ai/l/manufacturers-england) (1,794)
- [Companies with in-house R&D in England](https://www.tamtam.ai/l/r-and-d-companies-england) (1,703)
- [Retail companies in England](https://www.tamtam.ai/l/retail-companies-england) (1,415)
- [Hotel and hospitality groups in England](https://www.tamtam.ai/l/hospitality-groups-england) (1,273)
- [Education providers in England](https://www.tamtam.ai/l/education-companies-england) (1,081)
- [Hardware manufacturers in England](https://www.tamtam.ai/l/hardware-companies-england) (1,067)
- [Wellness and Fitness Services companies in England](https://www.tamtam.ai/l/wellness-and-fitness-services-companies-england) (1,032)
- [Critical infrastructure operators in England](https://www.tamtam.ai/l/critical-infrastructure-operators-england) (1,029)
- [Hospitality companies in England](https://www.tamtam.ai/l/hospitality-companies-england) (1,025)
- [Family-owned companies in England](https://www.tamtam.ai/l/family-owned-companies-england) (1,014)
- [Distributors and wholesalers in England](https://www.tamtam.ai/l/distributors-and-wholesalers-england) (938)
- [Healthcare providers in England](https://www.tamtam.ai/l/healthcare-providers-england) (810)
- [Insurance companies in England](https://www.tamtam.ai/l/insurance-companies-england) (699)
- [Consumer goods companies in England](https://www.tamtam.ai/l/consumer-goods-companies-england) (671)
- [Construction companies in England](https://www.tamtam.ai/l/construction-companies-england) (667)
- [Hospitals and Health Care companies in England](https://www.tamtam.ai/l/hospitals-and-health-care-companies-england) (649)
- [Public sector organisations in England](https://www.tamtam.ai/l/public-sector-organisations-england) (638)
- [Food and beverage companies in England](https://www.tamtam.ai/l/food-and-beverage-companies-england) (635)
- [Food and Beverage Services companies in England](https://www.tamtam.ai/l/food-and-beverage-services-companies-england) (606)
- [Food and Beverage Manufacturing companies in England](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-england) (582)
- [Corporate groups and holding companies in England](https://www.tamtam.ai/l/holding-companies-england) (578)
- [Restaurants companies in England](https://www.tamtam.ai/l/restaurants-companies-england) (506)
## The same list elsewhere in United Kingdom
- [Engineering Services companies in the United Kingdom](https://www.tamtam.ai/l/engineering-services-companies-united-kingdom) (77)
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Source: https://www.tamtam.ai/l/engineering-services-companies-england