is a freelance consultant in Wiesbaden. He studied biochemistry in Tübingen and completed his doctorate at the Max Planck Institute for Biology in Tübingen. In the following 25 years he worked in leading positions in production and quality assurance in the IVD industry. During this time, many Excel applications related to production and logistics were created and used in everyday manufacturing. These applications were all validated according to GMP standards. Since 2015, he has been working as a freelance consultant in the field of Excel applications in the pharmaceutical, medical device and IVD industries. His activities include both, the creation and validation of Excel applications, as well as the training of employees in the GMP-compliant use of Excel.