Citigroup Inc. has hired Jud Linville to be chief executive of its credit-card business, succeeding Paul Galant, who was named CEO of a new unit called new Global Enterprise Payments.

Linville has been president and CEO of American Express Co.'s U.S. Consumer Services operations.

Galant, who has been at Citi for more than a decade, has led Citi Cards since April 2009. Before that, he ran the banking giant's transaction-services business for institutional clients.

In his new role, Galant will oversee the design, marketing and implementation of comprehensive business-to-consumer and consumer-to-business payments solutions for the world's largest global corporations and financial institutions as well as governments. He will report to Manuel Medina-Mora, Citi's CEO of consumer banking for the Americas, and John Havens, CEO of Citi's Institutional Clients Group.

Medina-Mora has been parceling out duties in recent days after eight months on the job. The banking giant said Monday that it has hired Cecilia Stewart, the former retail chief at fallen banking powerhouse Wachovia Corp., to run its U.S. retail-bank operations.

Linville will run Citi's North America branded-cards business and work closely with the heads of its regional-cards businesses. He, too, will report to Medina-Mora.

During his 20 years at American Express, Linville was responsible for all U.S. cardmember, small-business and merchant-customer services.

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