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1971-1973: Postdoctoral fellow at ETH Zürich (with Prof. K.J.Hsü)
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1971-1972: 9-month visit at Imperial College London (with Prof. J. Ramsay and Dr. E.H. Rutter)
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1974-1976: Postdoctoral fellow at the Australian National University Canberra (with Prof. M.S. Paterson)
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1976-1977: Postdoctoral Fellow of the Deutsche Forschungsgemeinschaft at the Institut für Geophysik und Meteorologie Frankfurt (with Prof. H. Berckhemer)
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1977-1989: Oberassistent, since 1982 Privatdozent and Titularprofessor at Geologisches Institut ETH Zürich (with Prof. J. Ramsay)
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1989-2008: chair of Geology (Ordinariat) and chairman of Geologisch- Paläontologisches Institut at University Basel
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1998-1999: Dean of the Faculty of Narural Sciences University Basel
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2001-2002: Head of the Department of Earth Sciences University Basel
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2008: Retirement from Chair of Geology (Ordinariat) at University Basel
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2008-2010: Guest professor at FU Berlin (Alexander von Humboldt Forschungspreis)
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since 2010: Emeritus at Institut für Geophysik ETH Zürich