Professional Slideshow Creation with Narration

I'm looking for a skilled freelancer to create a professional online slideshow with narration. The content is educational, aimed at adults, focusing on professional skills. All the slides are done, they just need to have a more professional look. The video will be circulated to candidates as a precursor to them understanding their results. It will take 10 to 15 minutes to present.

Requirements:
- Engaging and informative slides (material provided)
- Clear, professional narration (prefer the option to have the Principal talking in the background)
- Suitable for adult learners

Ideal Skills & Experience:
- Experience in creating educational slideshows
- Strong presentation design skills
- Background in professional development content

Please provide samples of previous work and a brief outline of your approach.