There are lots of jobs around, especially for the UN and other NGO's however most of those contracts are held by South African companies, and the time on type requirements set by the UN etc are pretty high so you end up working as a Van p2 for awhile. On the bright side, there is alot of flying and it is really good "on your toes flying"
As for MAF, make sure you know everything about them before you agree to anything.