Joachim Ullrich studied geophysics and physics at Frankfurt University. He held positions at GSI, Darmstadt, at the Kansas State University, the University of Missouri, was chair of Experimental Physics at the University of Freiburg, before he was appointed a Director at the Max-Planck Institute for Nuclear Physics in Heidelberg. From 2012 to 2022 he was the President of the German National Metrology Institute, PTB. He has published more than 610 research papers and received several awards. Among them the Leibniz Award of the Deutsche Forschungsgemeinschaft (DFG), the David Bates Medal of the London Institute of Physics and the Stern-Gerlach Medal of the German Physical Society (DPG). He is a Fellow of the American Physical Society, Scientific Member of the Max-Planck Society, member of the German Academy of Science and Engineering, and member of the Berlin-Brandenburg Academy of Sciences and Humanities. In 2012 he became a member of the International Committee for Weights and Measures (CIPM) of the Meter Convention, was elected Vice President of the CIPM in 2015 and is the President of the Consultative Committee for the International Units (CCU). 2017 Joachim Ullrich was awarded the Federal Cross of Merit, 1st class for his achievements as a worldwide renowned scientist and research manager. Since 2022 he is the President of the German Physical Society.