Red will also be responsible for consolidating the programmes being run for Symantec and Symantec.cloud, the former MessageLabs business, which Weber Shandwick has been handling.
Red’s win comes months after losing its eight-year account with rival security firm McAfee, which started a review of its UK and Ireland PR business in the summer.
Symantec, a market leader in anti-virus software with its Norton range, wants Red to expand the company’s reputation in the media and promote it as more that just a security software company.
Katherine James, Symantec’s group public relations manager, UK & Ireland and Nordics, said: ‘Symantec’s business is constantly evolving to meet its customers’ needs in managing the ever-growing amount of information on which they are reliant.
‘As a consequence, its enterprise and corporate public relations programme is evolving in line with this, particularly to factor in communications activities around recent acquisitions.’
Symantec acquired VeriSign’s authentication business in 2010.