U.S. Treasury Secretary Timothy Geithner, who had considered stepping down after the government borrowing limit was raised, confirmed on Sunday that he will remain at his post at President Barack Obama's request. "I love my work. And I think if a president asks you to serve, you have to do it," Geithner told NBC/CNBC in an interview. With the U.S. unemployment rate above nine percent and the economy still scarred by crisis, "we still have a lot of work to do," he added.