Complex sentence: In 1976 he became professor at the Wuppertal University, and in 1978 the University of Mainz 1994 to 2002 he was director of the Mathematical Research Institute in Oberwolfach.
Split into simpler sentences: In 1976 he became professor at the Wuppertal University, and in 1978 he moved to the University of Mainz. From 1994 to 2002 he was director of the Mathematical Research Institute in Oberwolfach.