Daniel I. Werfel (born 1970/1971) is a Managing Director and Partner at Boston Consulting Group (BCG). He leads BCG's Public Sector Practice in North America. He formerly served as Acting Commissioner of the Internal Revenue Service of the United States. He served as the Acting Controller of the Office of Management Budget during the Administration of George W. Bush. In August 2009, President Obama nominated him to be the OMB Controller. The U.S. Senate confirmed him for the position of OMB Controller on October 13, 2009. In January 2011, while retaining the responsibilities of OMB Controller, he also took on the responsibilities of the OMB Deputy Director for Management. He worked as the Controller and Acting Deputy Director for Management until May 2013 at which time he was appointed as