Prof. Dr Jörn Oliver Sass

Professor for Bioanalytics and Biochemistry


Zur Personenseite
joern.oliver.sass [at]


von-Liebig-Str. 20
Office I 218; Laboratory F 012


Teaching Activities


Methods of Bioanalysis & Laboratory Diagnostics


Clinical Chemistry

• Pathobiochemistry & Metabolic Diseases

• Inborn Errors of Metabolism



Pathobiochemical mechanisms and laboratory diagnostics of inborn errors of metabolism, with special focus on aminoacylases (Aminoacylase 1 deficiency, Canavan disease), on amino acid N-acyltransferases und the metabolism of branched-chain and selected other amino acids (including disorders of ketone body formation and utilization). Development and implementation of bioanalytical methods for laboratory diagnostics. Our research is supported by the state of North Rhine-Westpalia (FH "Zeit für Forschung", FH Struktur "FunForGen") and by several foundations (Heinz und Heide Dürr-Stiftung, Gottfried und Julia Bangerter-Rhyner-Stiftung, Hans Hermann Voss-Stiftung, Fondation Claude et Giuliana).

J.O. Sass is associated with Metabolicum Ruhr and with the European Registry and Network for Intoxication Type Disorders (E-IMD)


Additional functions

  • Substitute member of the Faculty Council

Curriculum vitae

Professional History

1991: Diplom-Biochemiker (M.Sc. equivalent; Free University Berlin)

1991-1995: Research Associate (Free University Berlin)

1991-1993: Postgraduate diploma course in Environmental Protection at the Humboldt-University Berlin

1996: Promotion to Dr. rer. nat. (Ph.D. equivalent; Free University Berlin)

1996-2001: University Assistant at University of Innsbruck (University Hospital of Child and Adolescent Medicine), Austria

2002-2006: Head of the Laboratory of Metabolism of the Center of Child and Adolescent Medicine (ZKJ) of the University Hospital Freiburg; trainer according to the German Vocational Training Act

2005: Habilitation (postdoctoral degree with lecturing qualification) in Clinical Biochemistry (Albert-Ludwigs-University Freiburg)

2006-2012: Head of the Laboratory of Clinical Biochemistry and Metabolism, Administrative Head of the Laboratories of Hematology and Hemostaseology (ZKJ, University Hospital Freiburg)

Since 2009: Apl. Professor (supernumerary professor) of the Albert-Ludwigs-University Freiburg

Since 2010: Communicating Editor/Advisory Board Member of the Journal of Inherited Metabolic Disease

2012-2014: Principal Chemist, University Children’s Hospital Zürich; lecturer at the University of Zürich

Since 2015: Professor of Biology, in particular of Bioanalytics and Biochemistry (Bonn-Rhein-Sieg University of Applied Sciences)

Sep 2017-Aug 2020: Research Professor