Jürgen Karl-Josef Hescheler (born 2 May 1959) is a German physician and stem cell researcher. He is director to the Institute for Neurophysiology and a university professor at the University of Cologne. Prof. Hescheler is one of the most eminent and the most productive stem cell researchers worldwide[according to whom?], averaging more than 1000 citations of his publications per year. Hescheler has been working with embryonic stem cells since the late 80’s. He became the first researcher to accomplish an electrophysiological characterisation of stem cells and was also among the first scientists in Germany obtaining permission to do research on human embryonic stem cells.[citation needed] Furthermore, he is founder and chairman to the German Society for Stem Cell Research (GSZ).