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Grey Worldwide Korea - Grey group ranks among the world's top advertising and marketing organizations, serving one-fifth of the FORTUNE 500, in 96 countries. Under the banner of "Grey Famously Effective Since 1917," we continue to break new ground in brand experience across every platform and create lasting consumer connections - Our parent company is WPP, the world leader of communication service - Grey Worldwide Korea was founded in 2000, has been providing the total marketing communication service.