| Professor in Microbiology/Department of Microbiology | 2019 to date |
| Head/ Department of Microbiology | 2017 to date |
| Senior Lecturer and Head, Department of Pathology | 2008 to 2011 |
| Acting Head, Department of Pathology | 2006 to 2008 |
| Lecturer, Faculty of Medicine, University of Jaffna, Sri Lanka | 2004 to 2006 |
| Research Student, Faculty of Medicine, University of Peradeniya, Sri Lanka | 2003 to 2004 |
| Lecturer, Faculty of Medicine, University of Peradeniya, Sri Lanka | 2001 to 2003 |