You allude to an MBA. I do not have an MBA, but I do have such verbal acuity and believe that I can write at such a level.
I have a great breadth of knowledge, although I feel that my forte is in the humanities. I have lived in India for the past five years (so I can work cheaply) but I was born, raised and educated well (and attended UC Berkeley) in the United States so my mastery of English (both American and British) is flawless.