Constellation Energy Group Inc. has named John R. Collins CFO of the $19.3 billion electricity provider, which is based in Baltimore. Collins, who is currently senior vice president and chief risk officer, succeeds E. Follin Smith, who stepped down to spent more time with her family. Smith will serve as a consultant to ensure a smooth transition. Collins joined Constellation in 1988, and in 1997, he was named CFO of Constellation Commodities Group, a subsidiary. Collins was named executive vice president and chief risk officer in 2002 and two years later, became senior vice president.

ITT Corp. the $7.8 billion advanced technology products supplier, with headquarters in White Plains, has appointed Denise L. Ramos CFO. Ramos, 50, succeeds George E. Minnich who has announced his retirement. Most recently Ramos served as CFO of Furniture Brands International from February 2005. Previously, she spent five years as senior vice president and corporate treasurer of Yum! Brands Inc. as well as CFO of KFC Corp. Earlier, Ramos served for 21 years at Atlantic Richfield Co. (ARCO) in various finance positions.

Lenovo Group Ltd. appointed Wong Wai Ming CFO of the $13.3 billion personal computer maker, which is based in Hong Kong. Ming, 49, succeeds Mary Ma who has retired and will take on the new role of Non-Executive Chairman. Ming most recently served on Lenovo's Board of Directors and as chairman of the audit committee. Prior to joining the company, Ming spent 15 years in investment banking in various senior positions.

Visteon Corp. has appointed Michael J. Widgren vice president, corporate controller and chief accounting officer of the $11.4 billion global automotive supplier, which is based in Van Buren Township, Mich. Widgren, 39, succeeds William G. Quigley, who was promoted to CFO in March. Widgren arrived at Visteon in 2005 as assistant controller. Prior to joining the company, he served as chief accounting officer at Federal-Mogul Corp. Before that he spent part of his career at Coopers & Lybrand LLP.

Gerdau Ameristeel Corp. has appointed treasurer Barbara R. Smith as CFO of the $4.5 billion mini-mill steel producer in North America, which is based in Tampa. She succeeds Tom J. Landa, who is retiring. Smith came to Gerdau as Treasurer in July 2006. Prior to Gerdau, she was senior vice president and CFO of Faro Technologies Inc. Previously she spent 23 years with Alcoa Inc. where she served various financial roles, including Group CFO for Aerospace, Automotive and Commercial Transportation Group, CFO Alcoa Fujikura Ltd. and Director of Internal Audit.

Ashland Inc. announced the election of new treasurer J. Kevin Willis for the $7.3 billion global chemical maker, with headquarters in Covington, Ky. Willis, replaces Daragh L. Porter, who is retiring after dedicating 31 years to Ashland. Prior to the new election, Willis served as general auditor for 3 years. Willis joined Ashland in 1987 as an associate auditor in the internal audit department.

Platinum Underwriters Holdings Ltd. has named James A. Krantz CFO and executive vice president of the $1.5 billion provider of property, casualty and finite risk reinsurance coverage, based in Hamilton, Bermuda. Krantz, 47, is replacing Joseph F. Fisher who will be leaving at the end of his contract to pursue other interests. Krantz has served as executive officer since August 2006 and was CFO, senior vice president and treasurer of Platinum Underwriters Reinsurance Inc. from March 2003 through August 2006. Earlier, he spent nine years with KPMG LLP.

Aon Corp., the $9.0 billion Chicago-based provider of risk management services, has announced the resignation of CFO and Chief Administrative Officer David P. Bolger. Prior to joining the company in January 2003 Bolger, 49, held various senior positions at Bank One Corp. and its predecessor companies, America National Bank and First Chicago Bank. He will stay with the company until a successor is named to ensure a smooth transition.

School Specialty Inc., the $1 billion education company, which is based in Greenville, Wis., has announced the resignation of CFO and treasurer David G. Gomach. Gomach, 48, has resigned to pursue personal and professional interests. Prior to joining School Specialty in August 2006, he had retired as CFO from Chicago Mercantile Exchange Holdings, Inc in November 2004. The company has in initiated a search to find a successor.

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