Powerpoint strategy presentation

I need a graphic designer to create a set of fully editable powerpoint slides for a strategy presentation (about 5-10 slides). The format will be 1 main overall slide/image, and the remaining slides would need to be designed in a way that the presentation steps through relevant parts of that overall image, but with space to fill in additional relevant content for that part of the picture. I have already drafted the mock-up but require graphic design skills to make it look more professional etc.