The Zenith Optimedia chief executive, Perriss, will chair the Media Lions jury, while Offen, the chief executive of global operations at Media Planning Group, is a UK judge.
George Gallate, the chief executive of Euro RSCG Interaction, will be the Cyber Lions jury president. The UK judges will be Jason Goodman, the former president of Tribal DDB, and Jon Bains, the chairman of Lateral.
Malcolm Speed, the chief executive of RAPP Collins Worldwide, will be the Direct jury president.
Steve Harrison, a creative partner of Harrison Troughton Wunderman, and Mark Fiddes, a creative partner of KLP Euro RSCG, will be the UK judges.
This year the first Cannes Lions Direct show has been moved into the main event and runs on 20 and 21 June.