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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Petrofacpetrofac.com
International energy service provider specializing in designing, building, managing, and maintaining oil, gas, refining, and renewable energy infrastructure for leading energy companies worldwide |
14,616 | |||
| 2 |
Atkinsatkinsrealis.com
World-class engineering services and nuclear organization connecting people, data, and technology to transform global infrastructure and energy systems through design and management. |
9,798 | |||
| 3 |
PRIME GROUPweareprimegroup.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 |
3,359 | |||
| 4 |
Ricardoricardo.com
Global consulting firm providing strategic, environmental, and engineering solutions focused on transport, energy, and climate for sustainability. |
2,888 | |||
| 5 |
Bilfinger UKbilfinger.com
A leading engineering and maintenance provider with 4,000 employees in the UK, part of Europe's largest industrial services group |
2,688 | |||
| 6 |
Cavendish Nuclearcavendishnuclear.com
A leading nuclear services provider with international presence, specializing in innovative solutions across the nuclear energy life cycle |
1,908 | |||
| 7 |
ABLabl-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 |
1,687 | |||
| 8 |
Marshallmarshallgroup.com
Specializes in military aircraft maintenance, repair, overhaul, precision manufacturing, and bespoke mission conversions for global defense and aerospace clients. |
1,273 | |||
| 9 |
TWItwi-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 |
930 | |||
| 10 |
RED Engineering Designred-eng.com
Specialist building services and ICT engineers providing technical expertise to enable digital infrastructure and achieve zero carbon built environments globally. |
862 | |||
| 11 |
Briggs Equipment UK Ltdbriggsequipment.co.uk
Unique engineering and equipment provider offering Hyster and Yale materials handling products, full servicing, finance, rental, and asset management support. |
700 | |||
| 12 |
Aktrion Groupaktrion.com
The company provides fully managed quality support solutions for the automotive industry, including remarketing centers and optimizing product quality and efficiency |
601 | |||
| 13 |
Protec Fire and Security Groupprotec.co.uk
A leading life safety systems integrator with 55 years of experience, offering reliable products and services across diverse building sectors globally |
584 | |||
| 14 |
ALTEN LTD - UKalten.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. |
563 | |||
| 15 |
Genesisgenesisenergies.com
A market-leading advisory company specializing in providing technical and advisory services for the energy industry, focused on sustainability and innovation |
531 | |||
| 16 |
Quartzelec Limitedquartzelec.com
A leading independent electrical engineering group offering solutions and services for industrial, infrastructure, commercial sectors, with 100+ years of experience worldwide |
508 | |||
| 17 | 495 | ||||
| 18 |
Fichtner Consulting Engineers Ltdfichtner.co.uk
Independent engineering consultancy firm providing technical advisory and project management services in various sectors, with a focus on impartiality and client interests |
449 | |||
| 19 |
TEAM, Inc. UK, Africa, Caspianteaminc.com
A leading industrial services company specializing in construction, maintenance, and monitoring of pressurized piping systems for various industries worldwide ISO9001 and ISO14001 accredited |
439 | |||
| 20 |
TR, part of the Trifast plc grouptrfastenings.com
An international specialist in industrial fastenings & components, providing design, engineering, manufacturing, & distribution services to global assembly industries worldwide |
424 | |||
| 21 |
Capulacapula.com
A leader in system integration for industrial environments, focusing on digital transformation and operational technology to optimize efficiency, performance, and safety |
412 | |||
| 22 | 379 | ||||
| 23 |
BMSIbmsi.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 |
338 | |||
| 24 |
Rainham Industrial Services Ltdrainhamis.com
Specialist industrial services company in the UK, offering installation, maintenance, refurbishment, and decommissioning for various sectors with a focus on innovative solutions |
325 | |||
| 25 | 321 | ||||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
NIS Ltdnisltd.com
An engineering organization providing bespoke design and manufacturing services to quality-driven clients, aiming to deliver excellence while delighting customers |
233 | |||
| 27 |
Actemium UKactemium.co.uk
Delivers bespoke electrical, automation, and mechanical engineering solutions across various industries, critical infrastructure, and manufacturing, supporting operational efficiency and resilience. |
229 | |||
| 28 |
Cambridge Design Partnershipcambridge-design.com
Innovative end-to-end partner for global brands and start-ups, creating breakthrough products and services through interdisciplinary collaboration and employee ownership |
204 | |||
| 29 |
Longitude Engineeringlongitude-engineering.com
Specialist design and engineering services for marine, energy, and defence markets globally, with a client-focused approach and agile responsiveness |
190 | |||
| 30 |
Heyne Tillett Steelhts.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 |
175 | |||
| 31 |
24-7 Group24-7group.co.uk
Integrated facilities management, engineering, and technical services delivering M&E projects, steelwork, fit-out, renewables, cabling, and fire systems nationwide. |
155 | |||
| 32 |
Consult Redconsult.red
A technology consulting firm specializing in intelligent device and system development, offering expertise in product design, hardware, embedded, and cloud technology |
152 | |||
| 33 |
Hyde Group Limitedhydegroup.com
A UK-based engineering company with expertise in designing and manufacturing tooling solutions for commercial, defense, and nuclear industries, offering complete engineering services |
117 | |||
| 34 |
Orano Limitedorano.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 |
116 | |||
| 35 |
Nova Systems Internationalnovasystems.com
Global engineering services and technology solutions company, specializing in keeping nations and people safe through defense, essential services, and cybersecurity partnerships worldwide |
105 | |||
| 36 |
Synoptixsynoptix.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 |
86 | |||
| 37 |
Roltonrolton.com
A company specializing in innovative and sustainable design solutions, delivering projects with expertise, collaboration, and a focus on client satisfaction Engineering the Future™ |
69 | |||
| 38 |
City Sciencecityscience.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 |
68 | |||
| 39 |
Lairdlaird-assessors.com
Providing automotive intelligence through expert witness reports with AI automation & human expertise, delivering fair, honest, efficient service with advanced tech solutions |
59 | |||
| 40 |
Hydrotechnik UK Test Engineering Limitedhydrotechnik.co.uk
Distributor and manufacturer of hydraulic test points, sensors, dataloggers, and accessories for fluid and gas system analysis and testing. |
31 | |||
| 41 |
The Rockwood Grouprockwoodcomposites.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 |
24 | |||
| 42 |
ITP Group Ltditpgroup.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 |
22 | |||
| 43 |
ACEPP UKheverett.com
Assembles experienced teams for successful transfer of complex infrastructures to operators, applying expertise from construction engineering to testing, turning needs into tangible realities. |
19 | |||
| 44 |
Enertechnosenertechnos.com
A clean-tech innovator revolutionizing power delivery with Capacitive Transfer System technology for reduced losses, cost-effective solutions, and increased renewable energy utilization |
17 | |||
| 45 |
Helix Precision Machining Ltdhelixprecision.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 |
13 | |||
| 46 |
BIBBY PRECISION ENGINEERING LIMITEDbibbyengineering.co.uk
Specialized engineering and manufacturing company with 75 years of experience, offering precision parts, fabrication, and welding services to various industries |
13 | |||
| 47 |
Gordon Murray Technologiesgordonmurraytechnologies.com
Innovative company focused on bringing environmentally-friendly innovations to the mobility sector, prioritizing sustainability and reducing CO2 emissions in vehicles |
11 | |||
| 48 |
Bradford Lifts Ltdbradfordlifts.com
An independent and accredited lift company in the UK, specializing in maintenance, repairs, installations, and examinations with multiple accreditations and industry memberships |
9 | |||
| 49 |
JVD Engineering Ltdjvdengineering.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 |
8 | |||
| 50 |
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 |
7 | |||
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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 32,641
- Retail chains in England 2,917
- Manufacturers in England 1,794
- Companies with in-house R&D in England 1,703
- Retail companies in England 1,415
- Hotel and hospitality groups in England 1,273
- Education providers in England 1,081
- Hardware manufacturers in England 1,067
- Wellness and Fitness Services companies in England 1,032
- Critical infrastructure operators in England 1,029
- Hospitality companies in England 1,025
- Family-owned companies in England 1,014
- Distributors and wholesalers in England 938
- Healthcare providers in England 810
- Insurance companies in England 699
- Consumer goods companies in England 671
- Construction companies in England 667
- Hospitals and Health Care companies in England 649
- Public sector organisations in England 638
- Food and beverage companies in England 635
- Food and Beverage Services companies in England 606
- Food and Beverage Manufacturing companies in England 582
- Corporate groups and holding companies in England 578
- Restaurants companies in England 506