American Express Co., the biggest U.S. credit-card issuer by customer purchases, named McKesson Corp.'s Jeffrey C. Campbell as chief financial officer.

Campbell, 52, succeeds Dan Henry, 64, who announced in May that he was retiring after more than 20 years with AmEx, the New York-based lender said today in statement.

Campbell is currently CFO of San Francisco-based McKesson, the biggest U.S. health-care services company. Before joining McKesson in 2003, he served as CFO of American Airlines parent AMR Corp.

"Jeff is among the most respected leaders in finance, with deep experience as the CFO of large organizations in complex industries," AmEx Chief Executive Officer Kenneth I. Chenault, 62, said in the statement. "He knows how to generate shareholder value, facilitate growth, develop strong teams and build flexible financial models."

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