Sri Lankan diplomat Hamilton Shirley Amerasinghe did not hold any UN positions.
Amerasinghe was appointed Ceylon's Permanent Representative to the UN in 1967, a post he would hold until 1980. At the UN he held several key positions. These included Chairmanship of the United Nations Ad Hoc Committee on the Peaceful Uses of the Sea-Bed and the Ocean Floor beyond the Limits of National Jurisdiction, President of the United Nations Conference on the Law of the Sea and chairman United Nations Sea-Bed Committee. 
