About us

Our entrepreneurial spirit, combined with our expertise and our experience with complex underwater assignments, have earned us a leading global position in our sector. In the field of contracting and implementing complete concrete tanking projects with underwater concrete, working in depressurised spaces and immersing caissons pneumatically, OTN is operating at the very top of the market. And that’s where we intend to stay.

With our experienced employees, we can give our clients exactly what they need as far as knowledge, innovation and craftsmanship are concerned. And we back up our professional ‘partnership’, creativity and talent for solving problems with transparent estimates and calculations. Our experienced and ambitious employees are more than capable of devising innovative ideas and putting them into practice. We always like to take the initiative. And with more than fifty years of experience, we’re ready to take on any challenge that comes our way.