His leadership during pivotal moments in the war and his oversight of critical projects in war-torn regions exemplified his commitment to national defense and recovery.

He is renowned for volunteering to dismantle an explosive device placed under a bridge by the LTTE during Operation Sath Jaya, an act that saved numerous lives.

His work on the Piduruthalagala Transmission Tower road and projects in the Puttalam and Mannar regions further highlighted his contributions beyond the military sphere.

During his final years of service, he constructed several water reservoirs and dams, which were indispensable for supporting fauna, flora, and agriculture in the dry regions of the country.

[7] In 2012, Dissanayake also served in international peacekeeping operations under the guidance of the United Nations, where he oversaw the maintenance of an airfield in Chad during his deployment to the Central African Republic as part of a UN mission.