We are delighted and proud to announce that Holtmann+ has been officially certified according to ISO 20121 since May.

What began as a vision became reality through teamwork, commitment, and a clear focus on sustainable processes. From the first workshop to the final audit, it was a joint effort, marked by countless meetings, intensive preparations, and the passion of our entire team for greener management.

Special thanks go to our sustainability team, who contributed significantly to this success with their extraordinary commitment, expertise, and passion. We would also like to thank GutCert for their support during the certification process.

However, certification is not the goal for us, but rather an important step on our journey. Now it's time to keep going, continue developing, and live up to our high standards in our daily activities. Together, we want to design innovative projects that protect the environment and enable a sustainable future.

ISO 20121 is our promise – for today and tomorrow.