Brian Cornell has stepped down as Sam’s Club president and CEO, and has been replaced by Rosalind Brewer, who previously served as president of the Walmart U.S. East business unit. Walmart also named Rollin Ford chief administrative officer with responsibility for information systems, global sourcing, global business processes, global shared services and global customer insights. Ford was most recently chief information officer; Karenann Terrell replaced Ford as CIO. Gisel Ruis was named EVP and COO of Walmart U.S., responsible for U.S.