1. Managing Director, HydroCon GmbH, HefeHof 25, 31785 Hameln, Germany
2. Managing Director, natuerlichSTEIN GmbH & Co. KG, HefeHof 25, 31785 Hameln, Germany
3. Researcher, University of Technology, Sydney, Faculty of Engineering, PO Box 123, Broadway, NSW 2007, Australia
4. Stormwater Manager, City of Canada Bay, Sydney, Australia