In 1993, he became chief editor of Saamana, at the time owned by the founder of Shiv Sena, Bal Thackeray.

[citation needed] He opened the 2013–14 budget debate for Congress Party in Parliament.

Sanjay Nirupam lost to BJP candidate Gopal Shetty in the 2014 Lok Sabha elections.

[citation needed] He was appointed as President of Mumbai Regional Congress Committee in 2015.

[citation needed] After another poor showing at the polls, this time in the BMC elections in 2017, Nirupam tendered in his resignation as the head of the Congress Party for Mumbai.