Sivanayagam joined the editorial staff of the
Ceylon Daily News in 1953. He later wrote a column in
The Times of Ceylon. He then worked for the
Daily Mirror (1961–69), J. Walter Thompsons (1970–71) and Ceylon Tourist Board. Sivanayagam became the first editor of the
Saturday Review in January 1982. After the
Black July riots of 1983 the Sri Lankan government banned the
Saturday Review and Sivanayagam, fearing arrest, fled to
Madras where he was in charge of the Tamil Information Centre and Tamil Information and Research Institute. He contributed articles to several journals. He became editor of the newly created
Tamil Nation journal in October 1990. After the
assassination Rajiv Gandhi in May 1991 Sivanayagam was arrested under the
National Security Act and imprisoned without charge. He was abused and tortured by the Indian police. After being released Sivanayagam sought asylum in France in 1993. ==Later life==