About us
We are an independent testing body (validation and verification body) for environmental information on (construction) products. Our mission is to put data to the test—so that ecological decisions can be made on a reliable, transparent, and legally compliant foundation.
Because a sustainable (construction) industry needs reliable facts. Following the principle "What you can’t measure, you can’t manage," we create the basis for credible environmental data.
Manufacturers, planners, auditors, and other stakeholders benefit from our assessments, which meet the highest professional and methodological standards. This ensures that anyone working with our verified data can rely on quality, transparency, and substance.
Our team
Our work is driven by a dedicated team of seven experts:
- one managing director
- three sustainability managers
- two verifiers
- one working student
Stefan Zwerenz
Managing Director
Marco Muhl
Verifier
Martina Bender
Verifier
Anna Katharina Maute
Sustainability Manager
Marta Standio-Briasco
Sustainability Manager
Felicitas Gebreselassie
Sustainability Manager
Mia Schütt
Working Student
We combine expertise, independence, and a passion for sustainable solutions.

