Nedumangad Sivanandan was born to the harmonist-vocalist Neyyanttinkara Vasudevan Pillai and Dakshayani Amma in Neyyatinkara in Trivandrum district of Kerala.
Since then Sivanandan has been performing on stage, as well as teaching the art of Carnatic violin to numerous disciples, many of whom have achieved professional excellence with the instrument.
[citation needed] Nedumanagad Sivandan is a well-known accompanying artiste, soloist, teacher, and resource person for numerous music-related activities.
Nedumanagad Sivanandan has accompanied numerous senior vocalists including V. Dakshinamurthy, Neyyattinkara Vasudevan, Parassala Ponnammal, Padmashree K J Yesudas, Sudha Raghunathan, M.G.
His disciples, together with art lovers in the region, celebrated his 80th birthday on 28 June 2015 as "Sivananda Lahari", a day-long get-together with classical recitals and a public meeting.