Hi Rotorwind,
A few years ago, I helped setup an ATR cargo operator for DHL Africa, the contractor for DHL was Solenta Aviation. They are located in Johannesburg Lanseria Airport, but main bases are in west africa for operating crew, namely Abidjan, Libreville, and some others, maybe Malabo, Cotonou, Lome or Dakar, but I am not current on this.
Although I do not know anyone there anymore (that was 8/9 years ago), I know they are still operating on various contracts.
It might be worth going on their website to have a look. African aviation is challenging, demanding, but starting on a DHL contract is a good thing when it comes to seriousness and operating/maintenance standards (compared to the rest of Africa, not NASA...)
Typically, Solenta used to recruit on a regular basis, since many pilots would go to better climes as soon as they would get 1500 hours TT, or a better job opportunity.
If you are married with children, it might not be the best option, since the bases are not garanteed, you could be shifting from one place to another at short notice.
Good luck,
Flex