Create collage jpgs

I am looking to have someone create jpgs which are simple collages of groups of images that we have. These are going to be used on our website to represent different categories of products. Each image will need to have our logo or company name and will consist of no more than 6 images to form the collage. The copyrights of the created images are to remains solely with our company. Total number of images to create are 20 for this project. Worker will provide 2 jpg images - one with white background as one with a transparent background.