For a man who says, "The worst thing in the world for me would be if I were chained to a desk all day and couldn't leave - I like to roam around," becoming a bank regulator seems an odd career choice.

Mark A. Nishan, chief of staff at the Office of the Comptroller of the Currency, has few open spaces to wander in the OCC's offices on E Street in southwest Washington. So he appeases his restlessness by roaming the building's hallways and offices, talking with employees and generally keeping a finger on the agency's pulse. "I think you find out a lot that way," he says.

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