since 2010: 
Mason Professor of Mathematics at the University of Birmingham

2010: 
Senior Lecturer at the University of Birmingham

20042010: 
Lecturer at the University of Birmingham

20032004: 
Postdoctoral researcher at the Free University Berlin

2003: 
Habilitation (Hamburg)

20012003: 
Postdoctoral researcher at the University of Hamburg

2001: 
Ph.D. (Hamburg, supervisor: Reinhard Diestel)

1998: 
Diploma in Mathematics (Chemnitz)

1997: 
Certificate of Advanced Studies in Mathematics (Cambridge)
