Who we are

Specialist construction company & post-tensioning expert

We are a global specialist construction company and a recognized expert in post-tensioning and structural technologies. With 70 years of experience, we help build, preserve, and transform some of the world’s most ambitious structures, from bridges and high-rises to tanks and wind towers. As a subsidiary of Bouygues Construction,
we operate in 25+ countries, combining creative engineering, proprietary systems, and full-scope execution to
deliver durable, high-performance solutions.

Who we are

We are a specialist construction company and a pioneer in post-tensioning, stay cables, foundations, and ground engineering. We help design, build, maintain, and upgrade major engineered structures. We make the most complex projects achievable. We bring together design, technology, and execution across four key areas.

Core to VSL’s DNA, these technologies enhance strength, performance,
and durability while enabling bold and efficient designs.

From bridges to energy facilities and wind towers, we take on projects where precision, durability, and innovation are critical.

We analyze, reinforce, and secure the ground to support structures safely and sustainably.

We inspect, maintain, and repair structures to extend their service life and ensure satety and compliance.

What we do

Here’s how we support you across the lifecycle of your structure:

  • Design & Engineering: We support you with in-house structural design, value engineering, and feasibility studies.
  • Execution: We install specialized technologies and deliver on-site works safely and efficiently.
  • Maintenance & Repair: We help keep your assets in top condition through inspections, strengthening works, and upgrades.

We operate with strict quality controls, certified systems, and highly trained teams, backed by a culture of innovation and technical leadership.

VSL in numbers

From patents to projects, people to presence, our numbers tell the story of a company built on innovation, scale, and trust.
25+
countries of operation
3800
employees worldwide
6
technical centers in Europe and Asia
3
proprietary equipment plants
€530M
turnover (2024)
370
patents filed
25+
countries of operation
3800
employees worldwide
6
technical centers in Europe and Asia
3
proprietary equipment plants
€530M
turnover (2024)
370
patents filed

Why clients
trust VSL

70
years that customers trust us

Proven Technologies, In-House Expertise

We design and manufacture our own systems, test them rigorously, and deliver on site with unmatched operational skills.

A 360° Project Approach

From engineering to execution, our integrated model brings speed, safety, and cost efficiency to our clients.

Quality, Safety & Compliance

VSL operates under strict international standards, with certified workers and a strong safety culture. Our internal "Be More" program ensures continuous improvement and client satisfaction.

Innovation & Sustainability

We invest significantly in R&D and collaborate with academic and industry partners. Our carbon roadmap targets 20% to 40% reductions in emissions, aligned with Bouygues Construction's net-zero ambitions.

Our values and commitments

Safety First
Nothing matters more than ensuring every person goes home safely. VSL enforces rigorous site protocols and promotes a culture of vigilance through tools like the VSL Vigilance App.
Innovation with Purpose
From BIM-led engineering to AI-enhanced inspections, innovation is part of our DNA. We never stop pushing for better, in technologies, methods, and outcomes.
Trust and Ethics
Our teams operate with fairness, transparency, and responsibility. We work with integrity and respect, building trust every day with our clients, partners, and colleagues.
People-Centric Culture
We invest in our people through global mobility, lifelong learning, and a strong sense of purpose. VSL Academy, headquartered in Bangkok, trains hundreds of employees annually.
Sustainability
We are committed to reducing our carbon emissions by 30% by 2030, through more sustainable design, materials, and execution practices. Learn more.

FAQs about VSL
and How We Work

Discover more about who we are, what we do, and how we support complex infrastructure projects worldwide.

We provide design, supply, construction, maintenance, and retrofitting services in four core areas: post-tensioning and stay cables, civil works, ground engineering and foundations, and structural repair and strengthening.

Yes. Our engineers and specialists support feasibility studies, structural design, and method development. We tailor every solution to fit the geometry, constraints, and performance goals of your structure.

We operate under certified systems (including ISO standards), rigorous inspection protocols, and strong in-house R&D. Compliance with local and international codes is ensured at every stage.

Safety is at the heart of our culture. Our teams are trained, qualified, and regularly upskilled. We follow Bouygues Construction’s global safety standards and empower all workers to take an active role in risk prevention.

Contact us early in your planning process. We’ll support you from the first steps with technical advice, design input, and tailored construction methods.

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Get in Touch! Let’s talk about your next challenge.

Whether you’re designing a new bridge, upgrading a tower, or inspecting aging infrastructure, we’re here to help.