[1] Originally from Kota Setar, Kedah, Ayob Khan joined the police force in 1993 at the age of 27.
As Head of the Bukit Aman Special Branch Counter Terrorism Division (E8) from 2013 to 2019, Ayob Khan led the operations against many terrorist and militant groups which were active ranging from the Islamic State (ISIS) to Abu Sayyaf.
He led the operations to success by arresting recruits, middle men of the groups and prevented their plotted attacks in Malaysia.
On 20 June 2023, Minister of Home Affairs Saifuddin Nasution Ismail had an audience with Yang di-Pertuan Agong Abdullah to present the names of candidates for the Inspector-General of Police (IGP) and DIG positions.
It was reported that Ayob Khan, Director of the Bukit Aman Internal Security and Public Order Department Hazani Ghazali, Director of the Bukit Aman NCID Mohd Kamaruddin Md Din and an unknown were the candidates for the DIG position.