[1] The under secretary leads the department's policy on the issues of domestic finance, fiscal policy, fiscal operations, government assets, government liabilities, and other related economic and fiscal matters.

[3][4] Matthew Rutherford served as acting Under Secretary until January 30, 2015.

[5] President Barack Obama nominated Antonio Weiss for the position on November 13, 2014.

[6] Weiss was never confirmed by the Senate, and withdrew his nomination on January 12, 2015.

[7] On April 22, 2021 President Joe Biden nominated economist Nellie Liang for Senate confirmation in the position.