Liza Landsman, Citigroup Inc.'s U.S. head of online and mobile banking, is leaving the company a year after being named to help transform its consumer business with new technologies, said people with knowledge of the matter.

Landsman, 41, tendered her resignation last week, said the people, who requested anonymity because the move had not been announced. She had worked at Citigroup since 2000 and previously was an executive at International Business Machines Corp.

She was appointed to the technology post in August 2009 by then-North American consumer banking chief Teresa "Terri" Dial, 60, who led an effort to transform the business into a "bank of the future." Citigroup Chief Executive Officer Vikram Pandit ousted Dial in January, and her successor, Manuel Medina-Mora, has developed his own strategy.

Citigroup spokeswoman Natalie Riper said Landsman is an employee. Landsman, reached at home, declined to comment.

During Landsman's tenure, Citi Mobile introduced applications for Apple Inc.'s iPhone that let both retail banking customers and credit card users gain access to their account information on their phones. Last month, the bank said its banking application inadvertently saved customer information to users' phones, which may have transferred to computers if the iPhones were synchronized to PCs. Citi issued an update of the application that corrected the problem.

The unit also introduced Citi Shopper, a global-positioning-system-linked application that compares prices and shows maps to nearby retailers, as well as MasterCard Inc. Paypass stickers that can be affixed to the back of mobile devices to make touch-free payments at about 230,000 merchants.

Citi also offers text banking, which lets customers get account information sent to them by text message.

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