[5] After his term as governor, Aminu became an instructor at the Armed Forces Command and Staff College, Jaji.

[8] He was in competition with air commodore Emeka Omeruah to be selected as the next president of the West Africa Football Union (WAFU) in 1999.

[9] In March 1999, the head of Ghana Football Association gave his tacit support to Aminu's bid, provided he showed clear interest in the job.

[13] Aminu ran for governor of Katsina State in April 2003, but lost out to the incumbent Umaru Musa Yar'Adua, who later went on to become President of Nigeria.

[13] In June 2007, Aminu joined the race to succeed Bala Bawa Ka'oje as the chairman of the National Sports Commission.