Alter some Images

We need a resource who can create images of our service offerings for - "Cloud Computing, DevOps, BigData, Mobile Solutions, Staffing services" These will be included into photo slider on the home page. We want them images to align in sizes perfectly with our full page desktop/mobile websites and logo design. Anyone who is experienced with image and stock photos editing should only bid. People with access to their own stockphotos are preferred. We will be providing only design feedback and reference help. Timely delivery and effective communication is needed. No plagiarism please!!