Walmart Stores, the Arkansas-based retailer with $408 billion in 2009 revenue, promoted Charles Holley to CFO. He replaces Tom Schoewe, who is retiring. Holley, 54, had been executive vice president of finance and treasurer. Since joining Walmart in 1994, he has served as senior vice president of finance, controller, and CFO of Walmart International. Earlier, Holley was director of finance for international operations at Tandy Corp. and managing director for its European Memorex division.

Verizon Communications, the $108 billion telecommunications company, named Francis Shammo CFO and executive vice president. He succeeds John Killian, the CFO for New York City-based Verizon since March 2009, who is retiring. Shammo, 49, has been president of Verizon Telecom and Business since 2009, and before that served as president of Verizon Business. Earlier, he was CFO for Verizon Business. Shammo joined Verizon predecessor Bell Atlantic Mobile as general manager for accounting operations in 1989.

ConocoPhillips, the oil company with $149 billion in 2009 revenue, named Jeff Sheets CFO and senior vice president of finance. He replaces Sigmund Cornelius, who recently retired, along with several other executives. Sheets, 52, was previously senior vice president of commercial planning and strategy, as well as treasurer. He began working at Houston-based ConocoPhillips in 1980 as a process engineer, joined the treasury in 1990 as staff finance director, and was named assistant treasurer in 1998.