Uplift visuals on 20 PowerPoint slides

I am looking for a freelancer to uplift the visuals on 20 PowerPoint slides. The specific changes I want to see include redesigning the layout, pictures, icons - it should looks good for a business audience. I have specific design guidelines in mind, so the freelancer should adhere to those guidelines. I will provide the original PowerPoint file for the freelancer to work with. Ideal skills and experience for this job include proficiency in PowerPoint, graphic design, and the ability to create visually appealing and modern layouts.