| 2010 - 2014 | Dean, Faculty of Physical Sciences and Engineering, University of Southampton |
| 2002 - 2007 | Head of School of Electronics and Computer Science, University of Southampton |
| 1996 - 2002 | EPSRC Senior Research Fellow |
| 1994 - | Professor of Computer Science, Department of Electronics and Computer Science, University of Southampton |
| 1984 - 1994 | Lecturer, then Senior Lecturer, Department of Electronics and Computer Science, University of Southampton |
| 1978 - 1984 | Lecturer, then Senior Lecturer in Mathematics and Computing, La Sainte Union College of H.E., Southampton |
| 1977 - 1978 | Lecturer in Engineering Mathematics, Oxford Polytechnic |