S3/Cloud Content Delivery Network

We are a non-profit group that records our convention speakers and once a year. We are going to share the approx. 70 mp3 recondings (125MB each or 10GB total) with the 4000 convention attendees via Blazing CDN. We need help with origin file setup and CDN configuration. We nee a resource asap.
Contract duration of 1 to 3 months. with 30 hours per week.
Mandatory skills: Content Delivery Network setup, Blazing CDN, S3/Cloud