With the formation of the
Ceylon Army he was commissioned as lieutenant in the 1st Battalion,
Ceylon Light Infantry in 1950. The year after he was sent to the
Small Arms School Corps at
Netheravon. He participated in NATO manoeuvers with the
British Army of the Rhine, Germany and on his return he was promoted to captain, and appointed adjutant of the battalion in 1955. He transferred to the newly raised
Ceylon Sinha Regiment in 1956 and was appointed company commander in 1957. Having attended a Company Commander's course at the School of Infantry,
Warminster, he was promoted to Major in 1961. Was posted to the Army Training Center, Diyatalawa in 1963, and made acting commander of 1st Battalion,
Gemunu Watch in 1965. He then attended a course in Tactics and Counter- Insurgency at Jungle Training Center,
Canungra and promoted to the rank of lieutenant colonel and served as acting Commanding Officer, 1st Battalion Ceylon Light Infantry in 1967. He was made the commanding officer of the 1st Battalion of the Sri Lanka Sinha Regiment in 1968, and was subsequently sent on a six months' training course in financial management at the
United States Army Financial Management School and training in personnel management at the
United States Army Adjutant General School both in
Fort Benjamin Harrison. Subsequently, took up appointment at
Army HQ Colombo. He was appointed extra
aide-de-camp to President
William Gopallawa and later to Prime Minister
Sirimavo Bandaranaike in 1972. Promoted to Colonel in 1974. Promoted to Brigadier on 5 August 1977. He was appointed chief of staff on 1 December 1977 until his retirement on 18 March 1979. He was acting commander on two occasions, on 18 February 1978 and 16 October 1978, and was the last officer from the Ceylon Defence Force to leave active service. For wartime service in World War II, he had earned the
Defence Medal (United Kingdom) and the
War Medal 1939–1945, and for service in the Ceylon Army, he received the
Queen Elizabeth II Coronation Medal, the
Ceylon Armed Services Long Service Medal, the
Sri Lanka Army 25th Anniversary Medal,
President's Inauguration Medal, and the
Ceylon Armed Services Inauguration Medal. ==Later life==