I have worked in a busy team environment on 4 unique Calvin Klein marketing campaigns, freelancing with ICP (ICP provide premium co-production services to many international clients).
For these campaigns I produced Flash banners, videos, and static images that conformed with different publishers media requirements. These were based on set design briefs and supplied prototypes.
For publishing adverts, I gained experience using the Mediamind and Google Adsense platforms. There were also many bespoke banners that I supplied directly to publishers.