Walmart announced new CEO appointments for both its U.S. enterprise and Vice Chairman of Walmart Eduardo Castro-Wright has been appointed as Global’s president and CEO, while Bill Simon (pictured above) is Walmart’s new U.S. president and CEO.

Castro-Wright will maintain his seat as vice chairman, while both men report to Walmart’s President and CEO Mike Duke. Simon, previously Walmart’s COO, starts his new position immediately, whereas Castro-Wright takes over August 1.