Specializing in prefabrication, welding, skids, steel structures, and piping installation, we deliver high-quality, reliable solutions across industries. Our expert team ensures precision, safety, and timely project completion.
Who we are
Bringing practical expertise to global projects
OSS was established in 2007 in Plungė, Lithuania. Since its early days, OSS has been setting high goals and implementing ambitious projects. Having started its activities in Lithuania, the company has expanded throughout 15 countries over the last 19 years. Currently, OSS has established representative offices in Sweden, Finland and Norway.
Become our partner!
Experience you can rely on
At OSS, our goal is to provide long-term value. With 19 years of experience, we’ve built a strong team of skilled professionals who handle complex projects in international markets. We’re ready to share our knowledge and help you succeed.
More than
years of experience
Over
Projects Implemented
and more than
millions euro turnover in 2025
Our Clients
We Work with Top and Trusted Brands
Our Portfolio
Projects We Built
Testimonial
What They Say About OSS
Certificates and Awards
Certified by
