· Fred Harris Endowed Chair in Digital Signal Processing, San Diego State University2023–
· Head of the Institute for Digital Communications, The University of Edinburgh2016–2018
· Professor in Digital Communications and Signal Processing, The University of Edinburgh2015–
· Various Positions, Queen's University Belfast2004–2012
· Various Positions, University of Ottawa2002–2004
· Various Positions, Nortel Networks1998–2002
· Various Positions, McMaster University1997–1998