Pradhan was a member of the Sikkim Legislative Assembly for two consecutive terms from 1984 to 1994 representing Central Pendam constituency from Sikkim Sangram Parishad.
He was born into the erstwhile aristocratic Newar Taksari family.
His paternal grandmother Kanti Pradhan was the granddaughter of Taksari Chandrabir Maskey of Pakyong, an erstwhile Sikkimese feudal lord of many estates in Sikkim.
He was elected from Central Pendam constituency for two consecutive terms(1984 to 1994).
Later he joined Sikkim Democratic Front and served in various capacities as treasurer, general secretary and senior vice president.