# The 25 largest Engineering Services companies in Italy

Tamtam tracks 25 Engineering Services companies headquartered in Italy. This list ranks all of them by number of employees on LinkedIn, led by Saipem, MAIRE and Renco. Their median headcount is 371. Half of them were founded in 1988 or later. The most common headquarters are Milan (7) and Turin (2).

These Italian engineering services companies specialize in diverse fields, ranging from large-scale energy and infrastructure projects to advanced technology solutions. Many firms, such as Saipem, a global leader in energy and infrastructure engineering, and MAIRE, focused on energy transition technologies, operate internationally. Other significant players include Renco, which provides cost-effective solutions in energy and civil infrastructure, and CESI SpA, a technical consulting company in the energy sector.

A notable pattern among these companies is their strong presence in traditional industrial sectors like oil and gas, alongside a growing emphasis on renewable energies and sustainable solutions. Several companies also focus on cutting-edge technologies, with Teoresi Group specializing in Smart Mobility and AI, and Intecs in aerospace and defense applications. Milan emerges as a prominent hub for these engineering services firms.

🇮🇹 Italy · 25 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Saipem](https://www.tamtam.ai/c/saipem) (saipem.com)<br>Global leader in engineering and construction for energy and infrastructure projects worldwide, offering offshore and onshore services with a focus on sustainability and innovation | Engineering Services | 🇮🇹 Milan | 32,000 | 1957 |
| 2 | [MAIRE](https://www.tamtam.ai/c/maire) (groupmaire.com)<br>A technology and engineering group focused on enabling the Energy Transition, offering Sustainable Technology and E&C Solutions in various sectors worldwide | Engineering Services | 🇮🇹 Milan | 3,897 | 2005 |
| 3 | [Renco](https://www.tamtam.ai/c/renco) (renco.it)<br>An Italian company offering cost-effective solutions in energy, oil & gas, and civil infrastructure sectors through consulting, technical staffing, engineering, and construction services globally | Engineering Services | 🇮🇹 Pesaro | 2,022 | 1979 |
| 4 | [CESI SpA](https://www.tamtam.ai/c/cesi-spa) (cesi.it)<br>A global technical consulting company specializing in energy sectors such as transmission, renewables, testing, and environmental impact assessments for various clients worldwide | Engineering Services | 🇮🇹 Milan | 1,423 | 1956 |
| 5 | [Teoresi Group](https://www.tamtam.ai/c/teoresi-group) (teoresigroup.com)<br>A global engineering group specializing in cutting-edge technologies for Smart Mobility, Artificial Intelligence, Life Sciences, promoting innovation and sustainable practices for societal impact | Engineering Services | 🇮🇹 Turin | 1,021 | 1987 |
| 6 | [Fagioli](https://www.tamtam.ai/c/fagioli) (fagioli.com)<br>Specializing in global transport, logistics, heavy-lift transport, and engineering for various industries, offering door-to-door project cargo shipping services with over 50 years of experience | Engineering Services | 🇮🇹 Sant'Ilario d'Enza | 640 | 1955 |
| 7 | [AYES - Management & Technology Consulting](https://www.tamtam.ai/c/ayes-management-and-technology-consulting) (ayes.it)<br>International engineering & technology consulting company specializing in Automotive, Aerospace, Defense, Railway, Energy, Pharma & Life Science industries, with global support and a focus on innovation and human resources | Engineering Services | 🇮🇹 Milan | 616 | 2015 |
| 8 | [TXT E-TECH](https://www.tamtam.ai/c/txt-e-tech) (txtgroup.com)<br>The company offers software solutions, products, and services to industries facing global competition, focusing on performance, quality, efficiency, and compliance | Engineering Services | 🇮🇹 Cologno Monzese | 504 |  |
| 9 | [ESA engineering](https://www.tamtam.ai/c/esa-engineering) (esa-engineering.com)<br>International consultancy firm offering MEP design, technical arch engineering, project management, and sustainability services for buildings worldwide ISO certified for quality and environmental standards | Engineering Services | 🇮🇹 Sesto Fiorentino | 459 | 1994 |
| 10 | [Power Project Consulting](https://www.tamtam.ai/c/power-project-consulting) (ppcsrl.com)<br>A global engineering company specializing in Oil & Gas and Power Generation projects, offering EPC services and utilizing cutting-edge technologies for competitiveness | Engineering Services | 🇮🇹 Melilli | 417 | 2002 |
| 11 | [Intecs](https://www.tamtam.ai/c/intecs) (intecs.it)<br>International leader in design and development of applications, tools, software, hardware components and products for various critical markets including Aerospace, Defense, and Automotive. | Engineering Services | 🇮🇹 Rome | 413 | 1974 |
| 12 | [Eagleprojects S.p.A.](https://www.tamtam.ai/c/eagleprojects-s-p-a) (eagleprojects.it)<br>Design and development of advanced digital solutions for inspection, monitoring, and intelligent management of infrastructure systems. | Engineering Services | 🇮🇹 Perugia | 390 | 2016 |
| 13 | [SIPAL S.p.A.](https://www.tamtam.ai/c/sipal-s-p-a) (sipal.it)<br>A leading engineering company providing flexible, rapid, and competitive solutions to both civilian and military markets with over 40 years of experience | Engineering Services | 🇮🇹 Turin | 371 | 1978 |
| 14 | [Enereco S.p.A.](https://www.tamtam.ai/c/enereco-s-p-a) (enereco.com)<br>An independent engineering company providing customized and quality engineering services for oil, infrastructure, energy, and environmental projects with a focus on sustainability | Engineering Services | 🇮🇹 Fano | 353 | 1988 |
| 15 | [PES Group](https://www.tamtam.ai/c/pes-group) (pes-eng.net)<br>A global provider of multidisciplinary engineering, service, and service management in industries such as Oil & Gas, Renewable Energies, Petrochemical, and Automotive | Engineering Services | 🇮🇹 Rosignano Marittimo | 188 | 1979 |
| 16 | [TurinTech SpA](https://www.tamtam.ai/c/turintech-spa) (turintech.it)<br>Industrial engineering firm focusing on innovation and customized solutions for clients in various sectors, through consulting, engineering services, and Automotive project development | Engineering Services | 🇮🇹 Moncalieri | 185 | 2000 |
| 17 | [TEKNE SpA - Società Benefit](https://www.tamtam.ai/c/tekne-spa-societa-benefit) (teknespa.it)<br>A multidisciplinary firm specializing in engineering, architecture, and construction management, offering comprehensive services for public and private sector projects | Engineering Services | 🇮🇹 Milan | 171 | 1875 |
| 18 | [SMARTENGINEERING S.p.A.](https://www.tamtam.ai/c/smartengineering-s-p-a) (sengineering.it)<br>An industrial engineering firm specializing in mechanical and mechatronic engineering, with expertise in automation, packaging, automotive, and assembly machines Emphasizes innovation and R&D collaboration | Engineering Services | 🇮🇹 Rovereto | 171 | 2020 |
| 19 | [INCICO s.p.a](https://www.tamtam.ai/c/incico-s-p-a) (incico.com)<br>A multidisciplinary engineering company providing technical services for feasibility studies, design, and project management in the energy and industrial sectors | Engineering Services | 🇮🇹 Ferrara | 169 | 1980 |
| 20 | [Deerns Italia](https://www.tamtam.ai/c/deerns-italia) (deerns.com)<br>DEERNS is an international engineering consultancy excelling in sustainable design for built environments, providing expertise in mechanical, electrical, and sustainability systems | Engineering Services | 🇮🇹 Milan | 153 | 1928 |
| 21 | [ClarineT](https://www.tamtam.ai/c/clarinet) (clari-net.eu)<br>A private service company providing consultancy, design, technical services, commissioning, O&M, and training for various sectors globally through affiliated companies and partners | Engineering Services | 🇮🇹 Assago | 150 | 2007 |
| 22 | [RE:LAB s.r.l.](https://www.tamtam.ai/c/re-lab-s-r-l) (re-lab.it)<br>A leader in designing, developing, and evaluating Human-Machine Interfaces (HMI) through Interaction Engineering, with a user-centered, user-experience driven approach to improve technology interactions | Engineering Services | 🇮🇹 Reggio Emilia | 132 | 2005 |
| 23 | [INOPROD 🇫🇷🇨🇭](https://www.tamtam.ai/c/inoprod) (inoprod.com)<br>Inoprod provides consulting, expertise, and engineering services to help SMEs innovate products and processes, focusing on product development, optimization, and internal organization | Engineering Services | 🇮🇹 Milan | 27 | 2011 |
| 24 | [L.T. CALCOLI S.R.L.](https://www.tamtam.ai/c/l-t-calcoli-s-r-l) (ltcalcoli.it)<br>This company provides virtual prototyping services using CAE, develops customized software solutions, conducts training courses, and supports engineering projects internationally | Engineering Services | 🇮🇹 Merate | 14 | 1996 |
| 25 | [3E Ingegneria srl](https://www.tamtam.ai/c/3e-ingegneria-srl) (3eingegneria.it)<br>An engineering firm specializing in electric and thermal power systems, focusing on energy saving, environmental compatibility, and innovative energy management solutions | Engineering Services | 🇮🇹 Pisa | 12 |  |

## 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 12, 2026.

## More company lists in Italy

- [The largest companies in Italy](https://www.tamtam.ai/l/largest-companies-italy) (10,708)
- [Multinational companies in Italy](https://www.tamtam.ai/l/multinational-companies-italy) (2,339)
- [Manufacturers in Italy](https://www.tamtam.ai/l/manufacturers-italy) (1,879)
- [Companies with in-house R&D in Italy](https://www.tamtam.ai/l/r-and-d-companies-italy) (1,418)
- [Retail chains in Italy](https://www.tamtam.ai/l/retail-chains-italy) (1,320)
- [Family-owned companies in Italy](https://www.tamtam.ai/l/family-owned-companies-italy) (803)
- [Consumer goods companies in Italy](https://www.tamtam.ai/l/consumer-goods-companies-italy) (783)
- [Hardware manufacturers in Italy](https://www.tamtam.ai/l/hardware-companies-italy) (765)
- [Food and Beverage Manufacturing companies in Italy](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-italy) (671)
- [Critical infrastructure operators in Italy](https://www.tamtam.ai/l/critical-infrastructure-operators-italy) (622)
- [Retail Apparel and Fashion companies in Italy](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-italy) (608)
- [Financial services firms in Italy](https://www.tamtam.ai/l/financial-services-firms-italy) (588)
- [Food and beverage companies in Italy](https://www.tamtam.ai/l/food-and-beverage-companies-italy) (587)
- [Corporate groups and holding companies in Italy](https://www.tamtam.ai/l/holding-companies-italy) (561)
- [IT services companies in Italy](https://www.tamtam.ai/l/it-services-companies-italy) (499)
- [E-commerce companies in Italy](https://www.tamtam.ai/l/ecommerce-companies-italy) (495)
- [Luxury brands in Italy](https://www.tamtam.ai/l/luxury-brands-italy) (474)
- [Software Development companies in Italy](https://www.tamtam.ai/l/software-development-companies-italy) (456)
- [IT Services and IT Consulting companies in Italy](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-italy) (440)
- [Transportation, Logistics, Supply Chain and Storage companies in Italy](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-italy) (409)
- [Professional services firms in Italy](https://www.tamtam.ai/l/professional-services-firms-italy) (398)
- [Contract manufacturers in Italy](https://www.tamtam.ai/l/contract-manufacturers-italy) (395)
- [Companies with a mobile app in Italy](https://www.tamtam.ai/l/companies-with-mobile-app-italy) (394)
- [Public sector organisations in Italy](https://www.tamtam.ai/l/public-sector-organisations-italy) (392)

## The same list elsewhere

- [Engineering Services companies in the world](https://www.tamtam.ai/l/engineering-services-companies-in-the-world) (1,150)
- [Engineering Services companies in Europe](https://www.tamtam.ai/l/engineering-services-companies-in-europe) (623)

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