Olisa started his police career at Surrey Constabulary in south-east England after leaving university in 1982.
In June 2015 he was one of five Borough Commanders in the Metropolitan Police from a black or ethnic minority background.
[3] Olisa joined Surrey Police in 1982 after graduating from Royal Holloway, University of London.
He transferred to the Metropolitan Police on promotion to superintendent working in the London Borough of Southwark.
"With all the issues around the inquest hearing of the Mark Duggan shooting, that puts Haringey in a different perspective to Bexley.