Colleen O'Sullivan has been promoted to CFO,treasurer and senior vice president of Career EducationCorp., a $1.9 billion Shaumburg, Ill.-based provider ofpostsecondary education. She succeeds MichaelGraham, 52, who is leaving to become CFO of JMC SteelGroup. O'Sullivan, 45, at right, most recently served as thecompany's chief accounting officer, corporate controller and seniorvice president. She previously worked in senior finance positionsat Hewitt Associates, Sears Holdings and Arthur Andersen.

Big Lots, the $5.2 billion Columbus, Ohio-basedcloseout retailer, appointed Timothy Johnson CFOand senior vice president. He succeeds Joe Cooper,who will concentrate on his role as president of the company'sCanadian unit. Johnson has served as Big Lots' senior vicepresident of finance since July 2011. Since joining the company in2000, he has also served as director of strategic planning and vicepresident of strategic planning and investor relations.

Frontier Communications, the $5.2 billionStamford, Conn.-based phone, Internet and satellite televisionprovider, appointed Robert Starr treasurer andsenior vice president. He succeeds David Whitehouse, who left topursue another opportunity. Starr, 52, joinsFrontier from Lazard Freres & Co., where he was globaltreasurer. He previously served as corporate treasurer at AmbacFinancial and as first vice president of treasury at Salomon SmithBarney.