Design Needed for Sales Brochure/Powerpoint

We are putting together a sales presentation/PDF using powerpoint for layout and then converting to PDF. We have all the writing that we need for each slide/page but we need someone to make the presentation look really good, create visual design for each page, font, word layout, etc. Designer MUST have experience with sales presentations. It will be approximately 30-35 pages but much of the same design will be applied to each page so the job is very simple. Certain percentages in the presentation should be made into graphs to include visual appeal to the design. The existing presentation just needs to be laid out to look visually appealing and persuasive and go along with our branding.