Deputy Head of the Research Unit "Marine Biogeochemistry" and the Research Unit "Marine Geosystems" at GEOMAR. In the last 5 years, Mr. Eisenhauer has raised approx. 4 million euros in third-party funding and published more than 120 publications in renowned journals including Nature, Science and PNAS. In particular, Mr. Eisenhauer is interested in isotope systems which, due to their "dual use" character, can also be applied in medicine and the life sciences. In this field, Mr Eisenhauer has generated several patents. Prof. Eisenhauer is founder and shareholder of osteolabs.