Walmart has revealed another key executive change in the US.

Bill Simon, recently appointed as president and chief executive of Walmart US, has announced that chief merchandising officer John Fleming has made a personal decision to leave the company.

As a result, Simon has asked Jack Sinclair, executive vice-president and general manager, grocery, to lead food as well as the health and wellness merchandising teams, and John Westling, executive vice-president, planning, pricing and replenishment, to lead the general merchandising and replenishment teams.