He held an honors degree in physics from Punjab University and LLB from PULC and an LL.M in corporate law from the London School of Economics (LSE), UK.
[1] Aminullah joined Civil Service of Pakistan (CSP) in 1967 and held wide spectrum of secretarial and field appointments.
After the coup d'état of General Pervaiz Musharraf, Aminullah was immediately sacked from his position and was arrested and put in solitary confinement.
Aminullah, along with the Prime Minister Sharif and other senior officials had to face plane hi-jacking case by military government in a Pakistani trial court.
Later, he gave testimony, that he had received Sharif's orders to waylay the Musharrafs plane and got acquitted from the case by becoming a state witness and approver.