2002- present : Massman Chair of the Department of Civil Engineering and Geological Sciences, University of Notre Dame.
2007-present : Concurrent Professor of Chemistry and Biochemistry
2002- present : Professor of Civil Engineering and Geological Sciences, University of Notre Dame.
2000-2002 : Massman Associate Professor of Civil Engineering and Geological Sciences, Department of Civil Engineering and Geological Sciences, University of Notre Dame.
1999-2002 : Director of Graduate Studies, Department of Civil Engineering and Geological Sciences, University of Notre Dame.
1999-2002 : Associate Professor of Civil Engineering and Geological Sciences, University of Notre Dame.
1997-1999 : Assistant Professor of Civil Engineering and Geological Sciences, University of Notre Dame.
1996-1997 : Visiting Assistant Professor, Department of Geology, University of Illinois in Urbana-Champaign.
1995-1996 : NSERC Post-Doctoral Fellow, Department of Earth and Planetary Sciences, University of New Mexico
Topic: Structural hierarchy of U6+ phases: applications to the disposal of nuclear Waste.
1994-1995 : NSERC Post-Doctoral Fellow, Department of Earth Sciences, University of Cambridge
Topic: Phase transitions and microstructures of minerals.
1994-1995 : Research Fellow, Clare Hall College, University of Cambridge
1990-1994 : Lecturer and Teaching Assistant, Department of Geological Sciences, University of Manitoba
1988-1989 : Teaching Assistant, Department of Geology, University of Western Ontario
1986-1988 : Teaching Assistant, Department of Geology, University of New Brunswick
1986 Research Assistant, Department of Geology, University of New Brunswick
