Rear Admiral Jayantha Kularatne is a proud product of Mahanama College, Colombo. He joined the Sri Lanka Navy in 1987 as an Officer Cadet of 16th intake, in the Executive branch. On successful completion of his basic training from the Naval and Maritime Academy, Trincomalee, he was commissioned as a Sub Lieutenant in 1989. The senior officer has completed his Sub Lieutenant Technical Course at the Naval and Maritime Academy in 1990 and has specialized Long Navigation and Directions at the Navigation and Operations School, Pakistan Navy in 1999. Progressing steadily in his career, the senior officer elevated to the rank of Rear Admiral on 07th August 2020.

Rear Admiral Jayantha Kularatne has commanded many ships, craft and shore establishments during his distinguished career. Among other appoints he held, Deputy Director Naval Administration, Commodore Sea Training, Head of Naval Research Wing, Director Naval Training, Deputy Area Commander (East) and Port Facility Security Officer (Trincomalee) Director Naval Welfare, Director General Services, Director General Training and Commander Northwestern and Eastern Naval Areas were prominent.

The senior officer was appointed Deputy Chief of Staff of Sri Lanka Navy with effect from 12th October 2022, whilst he was holding the office as Commander Eastern Naval Area.