Joining the force in May 1992 as a cadet Inspector, Mba quickly distinguished himself as the best cadet academically at the Nigeria Police Academy, Kano.
Throughout his career, he held key positions in operations, investigations, administration, and public relations.
He served as Commissioner of Police in Ogun State and was in charge of the Border Patrol Force at Force Headquarters.
His operational roles included serving as an Area Commander in Ajah and Festac, Lagos.
Internationally, he represented Nigeria in United Nations peacekeeping missions in Liberia (2006-2007).
A trained lawyer, Mba earned his law degree from the University of Lagos and was called to the Nigerian Bar in 2002 after completing the Nigerian Law School in Abuja.
He also holds a Master of Laws with distinction from the University of Dundee, Scotland.
Additionally, he attended various international professional courses, including the FBI National Academy in Quantico, U.S., and leadership programs at Harvard University and Oxford.
Following these retirements, seven Assistant Inspectors-General of Police are expected to be promoted to the rank of Deputy Inspector-General.
The officers are AIG Margreth Ochalla, AIG Kenechukwu Onwuemelie, AIG Ishiaku Mohammed, AIG Zachariah Fera, AIG Zango Ibrahim, AIG Umar Shehu Nadada, and AIG Muhammed Abdul Sulaiman.
They are scheduled for promotion interviews at the Police Service Commission headquarters in Abuja on Friday.
