Interim Chair; Earth Sciences, Dalhousie University, 2015 - present

Full Professor; Earth Sciences, Dalhousie University, 2015 - present

Senior Research Fellow; University of Texas Institute for Geophysics, 2014 - present

Invited Professor; Centre National de la Recherche Scienti que, Nice, France, 2014

Invited Professor; Ecole Normale Superieure, Paris, France, 2013

Invited Professor; Observatoire de la Cote d'Azur, Nice, France, 2012

Associate Editor; Journal of Geophysical Research - Solid Earth, 2008 - present

Associate Chair; Earth Sciences, Dalhousie University, 2008 - 2010, 2014-2015

Canada Research Chair in Geophysics; Earth Sciences, Dalhousie University, 2006 - present

Associate Professor; Earth Sciences, Dalhousie University, 2006 - 2015

Adjunct Research Scientist; LDEO of Columbia University 2006 - present

Doherty Associate Research Scientist; LDEO of Columbia University 2004 - 2006

Post Doctoral Research Scientist; LDEO of Columbia University 2002 - 2004

Visiting Fellow; Pacific Geoscience Centre, 2000 - 2002

Geophysicist; NIS-NAFTAGAS Petroleum Corporation, 1991 - 1993