PowerPoint Presentation Enhancement

I need a freelancer to improve the overall look of my 30-slide PowerPoint presentation while keeping the existing content intact(on an urgent basis). The presentation is intended for business clients and should have a clean and professional style.

Key tasks include:
- Adjusting fonts, sizes, and alignment for consistency
- Enhancing the overall visual appeal without altering the content
- Ensuring the design is clean and professional

Ideal skills and experience:
- Proficiency in PowerPoint
- Strong design skills with a focus on professional presentations
- Attention to detail and ability to work on an urgent basis

Please provide samples of previous work, especially business-oriented presentations.