* 1978; studied law at Johannes Gutenberg University Mainz; studied business law at Mainz University of Applied Sciences, legal traineeship at Koblenz Higher Regional Court (focus on tax law), 2007-2009 research assistant at the Chair of Private International Law and Comparative Law at Johannes Gutenberg University Mainz, 2010 Examinations Office at FB03 of the Johannes Gutenberg University Mainz, 2011-2013 Managing Director at Mainz University of Music, 2013-2020 Head of Department Human Resources Services & Organisation at University of Music and Performing Arts, 2020-2023 Legal Advisor at University of Music and Performing Arts.
Sonja Diegmüller has been administrative director and budget officer of the Leibniz Institute of European History (IEG) in Mainz since 2023.