Sivanandamandiram Narayanan Sadasivan (1926–2006) was an Indian author.
Sadasivan wrote various books on public administration, the social history of India and management.
[1] For 14 years from 1964, Sadasivan worked for the Government of India as a teacher of Indian Civil Service trainees in various institutes across India.
[5] Sadasivan also co authored/written chapters of few books on public administration.
[citation needed] Sadasivan died of cancer in 2006.