Ad industry workers should expect concerned clients and bruised egos as the two companies combine. AdvertisementA coming mega-merger is set to make waves across the advertising world, especially among the millions of people employed by ad agencies globally. The deal would create the world's largest advertising agency holding company. They said ad industry workers should expect disruption like job cuts and opportunistic rivals swooping in for concerned clients as the new Omnicom takes shape. Job security in the ad agency world has been increasingly hard to come by.

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Persons: Omnicom, Doug Martin, General Mills, Steve Boehler, Forrester, Martin Sorrell, Sorrell, IPG, John Wren, Wren, Publicis, Maurice Levy couldn't, Shannon Stapleton, creatives, Simon Francis, Jay Wilson, Wilson Organizations: Interpublic Group, General Mills . Industry, IPG, Mercer Island Group, Bureau of Labor Statistics, S4 Capital, WPP, Nike, Reuters, Flock Associates, Gartner Locations: Omnicom