Professor of Mathematics, University of Otago Associate Professor of Mathematical Biology, University of Auckland, 2008--10 Senior Lecturer in Mathematical Biology, University of Auckland, 2005-2007 Associate Professor, Dept. Mathematics and Statistics, McGill University, Montreal. 2005 Assistant Professor, School of Computer Science and Department of Mathematics and Statistics, McGill University, Montreal. 2001-2005 Postdoc at LIRMM, Montpellier, with Olivier Gascuel, 2000-2001 Postdoc at CRM, Montreal, with David Sankoff, 1998-2000 Ph.D. (Mathematics) at University of Canterbury with Mike Steel 1994-1997