The company, which has 550 stores around the UK, is making changes to 13 roles out of 27 in its high street team, and asking staff to reapply for the jobs.
WH Smith insists that the restructure is not designed to reduce overall staffing levels in the marketing department and said there would not be mass redundancies.
The restructure will see disciplines such as advertising and promotions being brought together in one team, while local events and PR will also be amalgamated. Another role, focusing on online activity relating to Clubcard, will be created.
WH Smith brand director for UK retail Muriel Stirling said the restructure was designed "to ensure we have the best resources in place to deliver world-class marketing".
Stirling said the review of roles, undertaken by marketing unit director Nigel Leahy, was ongoing and should be completed next month.