[3][4] Akinsanya was born in Badagry, a town and local government area of Lagos State, South-Western Nigeria.
[5] Prior to his employment as a civil servant, Ajose had previously worked as Personnel Programmes Administrator with IBM Nigeria Ltd from 1975 to 1978.
In June 1979, he got employed as an Administrative Officer Grade VI after his deployment to the Civil Service Commission by the Lagos State Government.
In 2004, Ajose was appointed by Bola Tinubu as Lagos State Head of Service till February 2006 when he attained the statutory retirement age.
[5][6] In 2006, Bola Tinubu reappointed Akinsanya Sunny Ajose to serve as his Special Adviser until May 2007 when his tenure elapsed as governor of Lagos State.