Approved certification bodies
This is what auditors say:
Oliver Brendle, ZNU-Auditor for TÜV Rheinland Cert GmbH
The Improved Business Sustainability topic is not only relevant to me as a ZNU-auditor, but privately it is also close to my heart. Therefore I am pleased every time with the numerous audits that companies deal with this topic systematically with the goal of continuous improvement in all sustainability-related business processes.
Dr. Carolin Kollowa-Mahlow, Managing Director of ARS PROABTA GmbH
Improved Business Sustainability always entails "continuous learning". The annual ZNU audits makes this process visible to customers, staff and management.
Britta Ungruh, ZNU-Auditor for PCU Deutschland GmbH
The ZNU Standard - driving sustainable change is like a hall of mirrors. It reflects the variety of sustainability issues within the company - from existing potentials through to the focusing of certain relevant topics amongst many, to the discovery of new areas and opportunities - to a single mirror image of Improved Business Sustainability.