De Silva was appointed Professor of Medicine, University of Kelaniya in 1996, and was Dean of Medicine (1997-2006), and a member of the University Grants Commission (2008-2011).
De Silva was appointed Professor of Medicine, University of Kelaniya in 1996. De Silva was Dean of Medicine (1997-2006). De Silva was Dean of a member of the University Grants Commission (2008-2011).