Okoli is a Millwall academy graduate, having captained both their under-18 and under-21 sides. His first taste of senior football came when he was loaned to then-National League side Torquay United for a month in October 2022.
Returning to Millwall after making three starts, Okoli then joined Bromley on loan following a brief trial period in July 2023, enjoying a successful spell with 18 starts, scoring twice against Rochdale and Eastleigh as Bromley would go on to be promoted via the playoffs. Okoli himself was recalled by Millwall in January 2024.
The defender was then loaned out to Sutton United in September, making six starts and nine appearances in total, including being named as the club’s player of the month for September, before being recalled by Millwall.
