If an environmental management system is established in an organization, it must permanently be checked and developed further. This activity can be supported by an auditor. I have taken part successfully in a special training programme for operational environmental auditor with final examination at the technological academy Heilbronn. The contents of this examination were: European and German environmental law, certification and accreditation systems of the EU, organization of the operational environmental protection, introduction of an environmental management system, execution of environmental government audits, technical environmental protection, importance of business economics of the environmental management, liability questions in the environmental protection, risk precautions by handling hazardous materials according to standards.