President Barack Obama on Monday evening moved to fill three key Treasury positions, announcing his intent to nominate Neal Wolin to be deputy Treasury secretary and Lael Brainard to be undersecretary of Treasury for international affairs.Obama also said that Stuart Levey, the undersecretary for terrorism and financial intelligence, will remain in that position.The appointments would fill three of the four most senior Senate-confirmed Treasury Department positions beneath Secretary Timothy Geithner, who has been criticized for failing to quickly put in place his senior staff. Wolin served as general counsel at Treasury from 1999 to 2001 and as deputy general counsel from 1995 to 1999. He most recently served briefly in the Obama White House as an economic policy adviser.Brainard is a scholar at the Brookings Institution and was the chief White House international economics adviser to former President Bill Clinton. Levey is a Bush administration holdover who was confirmed by the Senate on July 21, 2004. His appointment does not require reconfirmation.