This selection of Utility System Construction companies includes established mid-sized firms specializing in various infrastructure projects. The companies cover a broad range of services from energy networks to urban development and waste management. Most of these firms were founded in the 20th century, indicating a sector with a long history.
Among them, SEMI focuses on electricity and industrial sectors with international expansion, while Bernhard provides turnkey energy solutions. Hanab Infra Solutions specializes in cable and pipeline installation in the Netherlands, and CEBAT SpA develops and maintains utility networks in Italy. Ghm, founded in 1837, offers lighting and urban furniture solutions, and Evac Group applies expertise in water and waste technologies globally. A notable pattern is the diverse geographic spread of headquarters, with companies located across Europe, North America, and South America.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
SEMIgruposemi.com
A leading company in the electricity and industrial sector, specializing in international expansion, innovation, and collaboration with universities for new technologies |
1,098 | |||
| 2 |
Bernhardenfrasolutions.com
An established Energy-as-a-Service company providing turnkey solutions for energy projects, with expertise in development, financing, design, construction, and operations |
754 | |||
| 3 |
Hanab Infra Solutionshanab.nl
Specialist in cable and pipeline installation, ensuring sustainable and reliable energy networks for consumers and businesses in the Netherlands. |
721 | |||
| 4 |
Enorsul Serviços em Saneamentoenorsul.com.br
Specializing in automation, operational and commercial development, services and construction, and concessions Providing efficient and productive solutions in various areas |
526 | |||
| 5 | 465 | ||||
| 6 | 420 | ||||
| 7 |
Evac Groupevac.com
With a focus on sustainability, Evac applies expertise in water and waste technologies globally to improve environmental performance for businesses |
411 | |||
| 8 |
Groupe MAÏAgroupe-maia.com
Diverse expertise supporting sustainable territorial development through infrastructure, renewable energy, heritage, biodiversity, and economic and tourism growth projects. |
377 | |||
| 9 |
Summit Line Constructionsummitlineconstruction.com
Leader in Electrical Utility Construction, providing innovative solutions with an ambitious, disciplined, and dedicated team for project needs |
330 | |||
| 10 |
Infravisioninfravision.com.au
Infravision creates connected hardware systems using drones for safer, more cost-effective, and environmentally friendly power line stringing, hardware installation, and monitoring in renewable energy transition |
278 | |||
| 11 |
FAYAT ENTREPRISE TPfayat.com
A subsidiary of FAYAT Group specializing in public works, including excavation, urban development, roads, civil engineering, and pollution control in Aquitaine region |
191 | |||
| 12 |
GRITEC GmbHgritec.com
Offering a range of technical building solutions tailored to meet customer needs, with modular products and comprehensive service from planning to delivery |
186 | |||
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| 13 |
DELPRO A/Sdelpro.dk
Specializes in electrical installations, maintenance, and construction for energy transmission, wind farms, power plants, and cable systems nationwide. |
185 | |||
| 14 |
BILFINGER INDUSTRIAL SERVICES - AUSTRIAbilfinger.com
Leading provider of industrial services in Austria, offering full-service solutions for industries like pipeline construction, power plants, hydropower, turbines, and equipment installation and maintenance |
173 | |||
| 15 |
B&H Construction, LLCbhboring.com
Family-owned underground utility construction company offering directional boring, trenching, welding, testing, inspection services for fiber, water, and natural gas infrastructure with exceptional customer service |
164 | |||
| 16 |
Vector Force Developmentvectorforcedevelopment.com
A Service-Disabled Veteran Owned Business providing construction support services to the energy industry and offering human capital solutions across various industries |
151 | |||
| 17 | 150 | ||||
| 18 |
Leroux & Lotz Technologies (LLT)lerouxlotz.com
Design and manufacture of custom biomass boilers and combustion systems, including maintenance, refurbishment, and complete rebuild services. |
149 | |||
| 19 |
SARC Société ARmoricaine de Canalisationssarcouest.fr
Specializes in potable water supply and sewer pipeline installation with over 40 years of expertise and strong commitment to sustainability. |
123 | |||
| 20 |
Sourcessources.fr
The company is an independent and thriving corporation specializing in water treatment plants and delivery of turnkey units domestically and internationally |
122 | |||
| 21 |
Sustainability Partners LLCsustainability.partners
This company forms partnerships with public entities to convert infrastructure to a monthly service, providing funding, project facilitation, and sustainability solutions |
61 | |||
| 22 |
Crowncrownek.com
Smart glass technology company with DynamicTint™ technology for transitioning between clear and dark states in seconds on various glass surfaces |
31 | |||
| 23 |
FRTP Auvergne-Rhône-Alpesfrtpaura.fntp.fr
Regional professional union for public works, supporting member companies on economic, social, fiscal, legal, and environmental issues. Also promotes workforce training and youth employment. |
18 | |||
| 24 |
GT Morbihangt-morbihan.com
Specializing in energy network infrastructure, urban lighting, telecommunications, and electric mobility solutions, with expertise in design, construction, and installation throughout Morbihan, France |
7 | |||
| 25 |
Ryanco Constructionryancoconstruction.com
Specializing in construction for Hydrogen, CNG, and petroleum infrastructure, this company solves energy industry challenges with professionalism and hard work |
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 12, 2026.
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