I can really only speak to Brazzaville, not so much Pointe Noire, although I don't expect it to be too different.
There doesn't seem to be a lot of aviation in Brazzaville. The flag carrier is operated and staffed by PrivatAir (Switzerland). The smaller turboprops that I've seen were operated under contract (Kasas Ltd of Kenya provides Dornier 228 on charter from Brazza to Odzala National Park). Other small operations (have seen 1 or 2 Caravans) seem to be contracts with South African companies & crews. Small bizjet ops seem to mostly be staffed by French pilots.
Really not much potential jobs - at least that I've seen - in the country. If they developed their tourism industry (beautiful country, so much potential) they could have a lot more bush opportunities. But for the time being, no joy.