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PeopleSoft last week announced that George Ahn, an ex-marketing executive at rival Siebel Systems, was named group vice president and general manager of its CRM business. Ahn replaces Joe Davis, who left PeopleSoft last month to be president and CEO of Coremetrics.

Ahn comes to PeopleSoft from TIBCO Software, where he had been executive vice president and chief marketing officer. Prior to that, Ahn worked at Siebel, overseeing the company’s midmarket and sales force automation group.

At PeopleSoft, Ahn will oversee strategy, product development, global marketing and customer support for the CRM software business.