

We are Rotan
We tackle every challenge with total dedication
Rotan – Comprehensive solutions that deliver results
Rotan is synonymous with comprehensive solutions in tank farm and plant construction, as well as in control and measurement technology and cleaning technology. With approximately 250 skilled professionals, we work on cutting-edge technologies, uphold the highest quality standards, and find a solution for every challenge – because our motto is: “Nothing is impossible.”
Our strength lies in the combination of scale and flexibility. We are large enough to tackle the most challenging projects, yet agile enough to act quickly and efficiently. Through our dedication and expertise, we lay the foundation for sustainable success –—today and in the future.
Strong Leadership, Family Roots
Strong Leadership, Family Roots
Thomas Holzwarth has served as the sole managing director of Rotan GmbH since 2020. With a degree in engineering and experience working on major international projects under his belt, the son of co-founder Bernd Holzwarth joined the management team at – and has since been ensuring, with passion and expertise, that Rotan remains prepared for the future.
In doing so, he can always rely on his executives from a wide variety of disciplines. Together, they drive the continued development of the family-owned business while remaining true to the ideals of an owner-managed company –, looking ahead to constantly readjust the sails for the right course into the future.
Milestones in a
Successful Development


Rotan was founded in Dannstadt by Messrs. Heil, Hammer, Seegmüller, and Holzwarth as specialists in pipeline construction and tank storage.
Construction of the administrative and workshop building in Dannstadt.
Opening of the Leuna branch, headed by M. Wüsthof.


Launch of the Cleaning Technology Division under the leadership of Wolfgang Haucke.


Construction of the administration and workshop building in Leuna.
Expansion of the workshop building and renovation of a staff quarters wing in Leuna.
Construction and expansion of an administrative and workshop building for the cleaning technology division.


Acquisition of Thönnes+Grimus Rostock and opening of the Rostock branch under the leadership of Volker Zimmer.


Holm Herfurth will take over as head of the Leuna branch.
Thomas Holzwarth joins the management team at – Rotan is run by Bernd and Thomas Holzwarth as an owner-managed family business.


Acquisition of Geritzmann Rohrleitungsbau and opening of the Gelsenkirchen branch.


Thomas Holzwarth will take over as the sole managing director.
Our Team–: The People Behind the Projects
Our Team–: The People Behind the Projects
Passion, technical expertise, and the joy of working together –—that’s what drives our team. We put our hearts and full dedication into every project. Each of us contributes our knowledge and skills so that, together, we can achieve great things.
Close to the Customer–—Ready for Action Anywhere
Close to the Customer–—Ready for Action Anywhere
With our headquarters in Dannstadt and locations in Rostock, Leuna, and Gelsenkirchen, we’re always close to our customers. And even across state lines, the same applies: We’re there wherever our customers need us—–—flexible and ready to go.

Creating Great Things Together

Creating Great Things Together
Whether you’re rolling up your sleeves right on the job or applying your expertise behind the scenes –—with us, you’re the focus. You’ll play an active role in shaping the future, continue to grow, and we’ll support you every step of the way—always in a way that suits you and your strengths.





