Cummins Inc., the $13 billion engine manufacturer based in Columbus, Ind., promoted Patrick J. Ward to CFO from vice president and engine business controller. He replaces Jean Blackwell, who became head of the Cummins Foundation. Ward, who joined the company in 1987, has held a number of financial leadership roles with increasing responsibility before becoming vice president in 2006. Succeeding Ward is Karen Battin, formerly controller of Cummins' power generation unit. Battin, 51, joined Cummins in 1998.

MF Global Ltd., the $5.7 billion broker of exchange-listed futures and options in Hamilton, Bermuda, named J. Randy MacDonald CFO. MacDonald, 52, replaces interim CFO Ira Polk, who continues in his role as chief administrative officer. MacDonald comes to MF Global from TD Ameritrade Holding Corp., where he served as CFO and treasurer from 2000 to 2006, and COO from 2006 to 2007. Earlier in his career he worked at Salomon Brothers and Deloitte & Touche.

Micron Technology Inc., the $5.7 billion manufacturer of semiconductors based in Boise, Idaho, appointed Ronald C. Foster vice president of finance and CFO. Foster, 57, succeeds Wilbur G. Stover Jr., who retired from the company last year. A member of Micron's board of directors from June 2004 to April 2005, Foster joins the company after three years as CFO of FormFactor Inc. Before that, he spent two years as CFO of JDS Uniphase Corp.