[5] Following Niger's first multiparty elections in 1993, a coalition government headed by Mahamadou Issoufou was named on 23 April 1993; it included Massaoudou as Minister of Communication, Culture, Youth and Sports.

[6] He served in that position until Prime Minister Issoufou resigned in late September 1994 and the PNDS left the ruling coalition, with a new government being named on 5 October 1994.

[7] Following the military coup led by Ibrahim Baré Maïnassara on 27 January 1996, Massaoudou was arrested on 13 July 1996 and tortured while in detention, with mock executions being used.

[14][15] Massaoudou served as Director of the Cabinet for over two years before being appointed to the government as Minister of the Interior, Public Security, Decentralization, and Customary and Religious Affairs on 13 August 2013.

[18] In the wake of the 2023 Nigerien coup d'état, Hassoumi Massaoudou remained loyal to President Mohamed Bazoum and denounced the military junta that overthrew him.