2009-present Director, Energy Frontier Research Center 2009-present The Henry Massman Professor of Civil Engineering & Geological Sciences, University of Notre Dame 2002-2009 Massman Chair of the Department of Civil Engineering and Geological Sciences, University of Notre Dame 2007-present Concurrent Professor of Chemistry and Biochemistry, University of Notre Dame 2002-2009 Professor of Civil Engineering and Geological Sciences, University of Notre Dame 2002-present Special Term Appointment, Chemistry Division, Argonne National Laboratory 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