Well I can answer some of Phred's questions ...

WHY are they there??
They are in Lagos because Julie's husband, Warren, was transferred there last year.

Who do they work for - what do they DO there?
I am not sure who her husband works for, but I do know that he works with the Oil and Gas companies to design and implement computer systems. In the past he worked for SUN systems, so it is obviously the big systems he works on.