Aug. 1978 - Dec. 1983
Friedrich-Ebert-Oberschule, Berlin, Germany. General Qualification for University Entrance (Abitur).

Oct. 1984 - Oct. 1990
Student of psychology at the Free University Berlin (Germany).

Apr. 1987 - Mar. 1990
working with Prof. Dr. A.O. Jäger in the project "productive thinking and intelligent behavior" (Produktives Denken - intelligentes Verhalten).

Oct. 1990
Degree in Psychology (Diplom) at the Free University Berlin. Final average grade 1.0 (1 is the highest mark). Thesis: "On the chronometry of intelligence".

Oct. 1990 - Oct. 1995
Ph.D. Student and Academic Assistant (Wissenschaftlicher Mitarbeiter) at the Department of Individual Differences and Personality Psychology at the Free University Berlin; working with Prof. Dr. A.O. Jäger and PD Dr. H.-M. Süß in the project "intelligence and knowledge".

10th May 1996
Ph.D. thesis at the Free University Berlin on oblique factor rotation towards simple structure.

Nov. 1995 to Mar. 2002
Academic Assistant at the Department of Individual Differences and Personality Psychology at the Dresden University of Technology, Germany. Working with Prof. Dr. B. Brocke on psychophysiological and psychometric aspects of individual differences

Apr. 2002 - Sept. 2002
Academic Assistant at the Department of Psychology at the University of Mannheim, Germany. Working with Prof. Dr. W.W. Wittmann on multivariate and psychometric aspects of individual differences

10th July 2002
Habilitation at the Dresden University of Technology on psychometric trait models.

Oct. 2002 - Aug. 2004
Chief Assistant at the Department of Psychology at the University of Mannheim,

Sept. 2004 - Aug. 2006
Deputy Professor for Differential Psychology and Psychological Assessment,
Helmut-Schmidt-University, University of the Federal Armed Forces Hamburg, Germany

Sept. 2006 - Sept. 2009
Professor for Differential Psychology and Psychological Assessment,
Helmut-Schmidt-University, University of the Federal Armed Forces Hamburg, Germany

Oct. 2009 - Sept. 2011
Professor for Differential Psychology and Psychological Assessment,
University of Hamburg, Germany

Since Oct. 2011
Professor for Psychological Methods, Psychological Assessment, and Evaluation
Rheinische Friedrich-Wilhelms-Universität Bonn, Germany