Mr. Kushan Sampath Jayaratne has served in the Sri Lanka Navy from 1994 to 2007. In particular, he has engaged in the operations affiliated to the Fast Attack Craft Flotilla for a long-time during duty. Later in the year 2007, he joined the service of the Parliament of Sri Lanka as an Assistant Serjeant-at-Arms and then in 2018 he was promoted to the position of Deputy Serjeant-at-Arms. Accordingly, he served in his capacity as the Deputy Serjeant-at-Arms till yesterday (30).