Well, the obvious companies to look at are:
Qatar Foundation
Qil companies ie. Mobile, Oxy, QP, Ras Gas etc etc
Get a list from the American & British embassy for the names of their companies.
Check into the different clubs/associations, I know the British have some men's lunch club/association and you will be able to get a lot of names from there.
The American Women's association
Most club/associations list the name of the company they or their husbands are with.
This way you will get lots and lots of info.
Good luck