Sudhamoy was the eldest of ten siblings born to the Bengali Tili Pramanik family in 1884 in Shantipur, Nadia.

Later he obtained a degree in law from the University of Calcutta and practised in Raiganj and the Sealdah courts as an advocate.

[10] Raigunj celebrated Independence day (Purna Swaraj) on 26 January 1930 against the British Raj - he and Umeshchandra Bhowmik were the Congress leaders enacting the historic Lahore resolution of the CWC.

On 15 April, on the occasion of the Bengali New Year, Sudhamoy presided over public meetings in Raigunj as a part of the Civil Disobedience Movement in blatant violation of the Salt Laws.

Braving arrests by the British, volunteers from all over the district, including women, paraded the streets of Raigunj.