Air Vice Marshal Rajinth Jayawardena joined to the General Sir John Kotelawala Defence Academy in November 1992 as a cadet officer. After successful completion of the academics and military training he was graduated with degree of BA (Defence Studies) and was commissioned as a Pilot Officer in the Administrative Branch of Sri Lanka Air Force in December 1994.

Subsequently, he has followed Junior Command and Staff Course at Sri Lanka and Coimbatore India in 2004 and successfully completed psc (passed staff college) at Defence Services Command and Staff College, Sapugaskanda in 2010. He possessed a Master of Defence Studies conferred by University of Kelaniya and Master of Science (Defence Studies) in Management at General Sir John Kotelawala Defence University. In 2022, he followed ndc at prestigious National Defence College Dhaka Bangladesh and also recipient of Master of Social Science in Security and Development from Bangladesh University of professionals.

Air Vice Marshal Jayawardena has held numerous key appointments throughout his distinguished career in the Sri Lanka Air Force, encompassing command, training, and staff roles. Notably, he served as the Officer Commanding Personnel Services at three major Air Bases: China Bay, Vavuniya, and Anuradhapura. He has also rendered valuable service as Directing Staff (Admin) and Senior Instructor at the Junior Command and Staff College, SLAF Academy China Bay. In addition, he served as a Directing Staff at the Defence Services Command and Staff College in Sapugaskanda.

At Air Force Headquarters, he held several important positions, including Staff Officer Admin and Acting Air Secretary to the Commander of the Air Force. Furthermore, he served as the Commanding Officer at SLAF Station Weerawila and later as Commanding Officer (Volunteer) at Air Force Headquarters. His leadership capabilities were further demonstrated in his role as Director Personnel Administration and Commanding Officer of the Women’s Wing.

Subsequently, Air Vice Marshal Jayawardena was appointed as Rector of the Metropolitan Campus at General Sir John Kotelawala Defence University. He later assumed the appointments of Acting Base Commander of SLAF Base Katunayake and Provost Marshal, prior to taking up his current role as the Acting Director General Welfare.

In recognition of his exemplary service, he was awarded the Uttama Seva Padakkama (USP).

Beyond his military duties, he has represented the Sri Lanka Air Force in golf, tennis, and squash both as a player and in an official capacity. Presently he serves as the Chairman of the Sri Lanka Air Force Handball Team.

Air Vice Marshal Jayawardena is married to Anoma and they are blessed with a son, Danuj.