| From April 2000 | 
					
						Professor of Botany (Systematics) at the University of Hamburg, Germany
						 
						  
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					| 1997-2000 | 
					
						Heisenberg-fellowship of the Deutsche Forschungsgemeinschaft (DFG), University of Mainz, Germany
						 
						  
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					| 1998 | 
					
						Venia Legendi by the University of Mainz, Germany
						 
						  
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					| 1996 | 
					
						Habilitation and Venia Legendi by the University of Heidelberg, Germany
						 
						  
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					| 1991-1997 | 
					
						Scientific Assistant (equivalent to Assistant Professor) in the group of Prof. Dr. Peter Leins, University of Heidelberg, Germany
						 
						  
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					| 1989-1990 | 
					
						Scientific employee of Prof. Dr. Klaus Kubitzki, University of Hamburg, Germany
						 
						  
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					| 1986-1989 | 
					
						Postdoctoral fellowship by the Deutsche Forschungsgemeinschaft (DFG), University of Hamburg, Germany, and Missouri Botanical Garden, St. Louis, U.S.A.
						 
						  
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					| 1986-1987 | 
					
						Postdoc at the Missouri Botanical Garden, St. Louis, U.S.A.
						 
						  
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					| 1982-1986 | 
					
						Scientific employee of Prof. Dr. Klaus Kubitzki, University of Hamburg, Germany
						 
						  
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					| 1986 | 
					
						PhD in Botany under the supervision Prof. Dr. Klaus Kubitzki, University of Hamburg, Germany
						 
						  
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					| 1982 | 
					
						Diploma in Biology under the supervision of Prof. Dr. Klaus Kubitzki, University of Hamburg, Germany
						 
          
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