| iCORE Professor of Quantum Information Science | Department of Physics & Astronomy | University of Calgary | 2003 - Present |
| Adjunct Professor of Quantum Information Science | Department of Physics | Macquarie University | 2003 - Present |
| Professor and Head of Physics | Department of Physics | Macquarie University | 2001 - 2003 |
| A/Professor and Head of Physics | Department of Physics | Macquarie University | 1997 - 2001 |
| Senior Lecturer | Department of Physics | Macquarie University | 1993 - 1996 |
| Lecturer | Department of Physics | Macquarie University | 1991 - 1992 |
| Part-time Lecturer | Department of Physics | The University of Queensland | 1991 |
| ARC Research Associate | Department of Physics | The University of Queensland | 1990-91 |
| UGS Postdoctoral Fellow | Department of Physics & Electronic Engineering | University of Waikato | 1989-90 |
| ARC Research Associate | Department of Physics | The University of Queensland | 1988-89 |
| ARGS Research Associate | Department of Physics and Theoretical Physics | The Australian National University | 1987-88 |
| NSERC Summer Research Assistant | Department of Mathematics and Statistics | University of Calgary | 1983, 1984 |
| Vice President (Academic) | Students' Union | University of Calgary | 1982-83 |
| NSERC Summer Research Assistant | Department of Physics | University of Calgary | 1981 |
| Instructional Aide | Department of Mathematics | Bishop Carroll High School, Calgary | 1980 |