Deshamanya Robin Bradman Weerakoon, CCS (born 20 October 1930) is a Sri Lankan civil servant.

[1] His father, Edmund R. Weerakoon and his mother, a teacher at Princess of Wales College, were both devout Anglicans.

After Sirimavo won the election again in 1970, he was transferred as Government Agent of Batticaloa and later Ampara, since he was deemed untrustworthy having conveyed information to the UNP Dudley Senanayake during Mrs. Bandaranike's previous regime.

In 1984, he rejoined IPPF as its secretary-general in London for one year, which entailed a great deal of travel from China to Africa to Mexico.

Following President Premadasa's assumption of office he was appointed presidential advisor on international affairs during a period when Indo-Lanka relations were at their lowest, following the expulsion of the IPKF.