[1] He was Nigeria's Ambassador to the United States from 1999 to 2003 and served as the senator representing Adamawa Central senatorial district from 2003 to 2011.
He was made a Distinguished Fellow of the Nigerian Postgraduate Medical College in 2004.
As a Senator Aminu was appointed to committees on Foreign Affairs, Education, Air Force and Health.
[2] In a mid-term evaluation of Senators in May 2009, ThisDay said that he had not sponsored any bills, but had contributed to debates on some motions.
[3] On 2 January 2010, Aminu was installed the "Bobaselu of The Source" by the Ooni of Ife, Oba Sijuwade.