Hi,
there is a German Operator out of NUE who is working on contract for the UN at 3 different locations in Africa. Not always fun locations, be advised (the lastest of which is Kinshasa, if I'm informed correcctly)!
This company is not advisable to be employed by (if you know what I mean
), but for a free-lancer the conditions ($$$) are above standard. Aircraft to be operated are LJs (35, 55 and 60). Good luck!