WASHINGTON — President Obama has chosen three people to join the senior ranks of the Treasury Department.

The White House yesterday said Obama is nominating David S. Cohen to be assistant secretary in dealing with terrorist financing, Alan B. Krueger as assistant secretary for economic policy and Kim N. Wallace as assistant secretary for legislative affairs.

Each nominee is already serving as a counselor to Treasury Secretary Timothy Geithner. All three are now subject to Senate confirmation.

Geithner has been criticized for getting his department up to full staff too slowly, with few people authorized to make decisions or represent the agency in outside meetings. Treasury officials, however, say that the pace of its top staffing is not behind that of recent administrations. The agency says it has been aggressive in dealing with a financial crisis, a struggling auto industry and a wave of home foreclosures.