powerpoint upgrade for biotech company

I'm looking for someone to upgrade my existing PowerPoint presentation for my biotech company. This presentation will be used for pitching a product or idea and so I need it to be visually appealing and organized. I have specific branding and style guidelines which I will provide, so I need someone who can adhere to those guidelines. Specifically, I am seeking help with the visual design and layout of the presentation. I expect the freelancer to help make my presentation more effective with their creative skills, while still following my provided guidelines. Furthermore, I hope the freelancer can also incorporate multimedia elements into the presentation for a stronger impact.